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Author SHA1 Message Date
Vitaliy Filippov c414a90abc TRACE 2020-05-28 12:41:08 +03:00
Vitaliy Filippov 36fe7d394b EPOLLLT 2020-05-28 12:41:08 +03:00
Vitaliy Filippov 540137dd23 Submit 2020-05-28 12:41:08 +03:00
164 changed files with 6316 additions and 18498 deletions

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.git
build
packages
mon/node_modules
*.o
*.so
osd
stub_osd
stub_uring_osd
stub_bench
osd_test
dump_journal
nbd_proxy
rm_inode
fio
qemu
rpm/*.Dockerfile
debian/*.Dockerfile
Dockerfile

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.gitignore vendored
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*.o
*.so
package-lock.json
fio
qemu
osd
stub_osd
stub_uring_osd
stub_bench
osd_test
osd_peering_pg_test
dump_journal
nbd_proxy
rm_inode
test_allocator
test_blockstore
test_shit
osd_rmw_test

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.gitmodules vendored
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[submodule "cpp-btree"]
path = cpp-btree
url = ../cpp-btree.git
[submodule "json11"]
path = json11
url = ../json11.git

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cmake_minimum_required(VERSION 2.8)
project(vitastor)
add_subdirectory(src)

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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
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Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
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Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
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The hypothetical commands `show w' and `show c' should show the appropriate
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You should also get your employer (if you work as a programmer) or your
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necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

27
LICENSE
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Copyright (c) Vitaliy Filippov (vitalif [at] yourcmc.ru), 2019+
All server-side code (OSD, Monitor and so on) is licensed under the terms of
Vitastor Network Public License 1.1 (VNPL 1.1), a copyleft license based on
GNU GPLv3.0 with the additional "Network Interaction" clause which requires
opensourcing all programs directly or indirectly interacting with Vitastor
through a computer network and expressly designed to be used in conjunction
with it ("Proxy Programs"). Proxy Programs may be made public not only under
the terms of the same license, but also under the terms of any GPL-Compatible
Free Software License, as listed by the Free Software Foundation.
This is a stricter copyleft license than the Affero GPL.
Please note that VNPL doesn't require you to open the code of proprietary
software running inside a VM if it's not specially designed to be used with
Vitastor.
Basically, you can't use the software in a proprietary environment to provide
its functionality to users without opensourcing all intermediary components
standing between the user and Vitastor or purchasing a commercial license
from the author 😀.
Client libraries (cluster_client and so on) are dual-licensed under the same
VNPL 1.1 and also GNU GPL 2.0 or later to allow for compatibility with GPLed
software like QEMU and fio.
You can find the full text of VNPL-1.1 in the file [VNPL-1.1.txt](VNPL-1.1.txt).
GPL 2.0 is also included in this repository as [GPL-2.0.txt](GPL-2.0.txt).

90
Makefile Normal file
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BLOCKSTORE_OBJS := allocator.o blockstore.o blockstore_impl.o blockstore_init.o blockstore_open.o blockstore_journal.o blockstore_read.o \
blockstore_write.o blockstore_sync.o blockstore_stable.o blockstore_rollback.o blockstore_flush.o crc32c.o ringloop.o
# -fsanitize=address
CXXFLAGS := -g -O3 -Wall -Wno-sign-compare -Wno-comment -Wno-parentheses -Wno-pointer-arith -fPIC -fdiagnostics-color=always
all: $(BLOCKSTORE_OBJS) libfio_blockstore.so osd libfio_sec_osd.so stub_osd stub_bench osd_test dump_journal
clean:
rm -f *.o
crc32c.o: crc32c.c
g++ $(CXXFLAGS) -c -o $@ $<
json11.o: json11/json11.cpp
g++ $(CXXFLAGS) -c -o json11.o json11/json11.cpp
allocator.o: allocator.cpp allocator.h
g++ $(CXXFLAGS) -c -o $@ $<
ringloop.o: ringloop.cpp ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
timerfd_interval.o: timerfd_interval.cpp timerfd_interval.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
timerfd_manager.o: timerfd_manager.cpp timerfd_manager.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
%.o: %.cpp allocator.h blockstore_flush.h blockstore.h blockstore_impl.h blockstore_init.h blockstore_journal.h crc32c.h ringloop.h object_id.h
g++ $(CXXFLAGS) -c -o $@ $<
dump_journal: dump_journal.cpp crc32c.o blockstore_journal.h
g++ $(CXXFLAGS) -o $@ $< crc32c.o
libblockstore.so: $(BLOCKSTORE_OBJS)
g++ $(CXXFLAGS) -o libblockstore.so -shared $(BLOCKSTORE_OBJS) -ltcmalloc_minimal -luring
libfio_blockstore.so: ./libblockstore.so fio_engine.cpp json11.o
g++ $(CXXFLAGS) -shared -o libfio_blockstore.so fio_engine.cpp json11.o ./libblockstore.so -ltcmalloc_minimal -luring
OSD_OBJS := osd.o osd_secondary.o osd_receive.o osd_send.o osd_peering.o osd_flush.o osd_peering_pg.o \
osd_primary.o osd_primary_subops.o etcd_state_client.o cluster_client.o osd_cluster.o http_client.o pg_states.o \
osd_rmw.o json11.o base64.o timerfd_manager.o
base64.o: base64.cpp base64.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_secondary.o: osd_secondary.cpp osd.h osd_ops.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_receive.o: osd_receive.cpp osd.h osd_ops.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_send.o: osd_send.cpp osd.h osd_ops.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_peering.o: osd_peering.cpp osd.h osd_ops.h osd_peering_pg.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_cluster.o: osd_cluster.cpp osd.h osd_ops.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
http_client.o: http_client.cpp http_client.h
g++ $(CXXFLAGS) -c -o $@ $<
etcd_state_client.o: etcd_state_client.cpp etcd_state_client.h http_client.h pg_states.h
g++ $(CXXFLAGS) -c -o $@ $<
cluster_client.o: cluster_client.cpp cluster_client.h osd_ops.h timerfd_manager.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_flush.o: osd_flush.cpp osd.h osd_ops.h osd_peering_pg.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_peering_pg.o: osd_peering_pg.cpp object_id.h osd_peering_pg.h pg_states.h
g++ $(CXXFLAGS) -c -o $@ $<
pg_states.o: pg_states.cpp pg_states.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_rmw.o: osd_rmw.cpp osd_rmw.h xor.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_rmw_test: osd_rmw_test.cpp osd_rmw.cpp osd_rmw.h xor.h
g++ $(CXXFLAGS) -o $@ $<
osd_primary.o: osd_primary.cpp osd_primary.h osd_rmw.h osd.h osd_ops.h osd_peering_pg.h xor.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_primary_subops.o: osd_primary_subops.cpp osd_primary.h osd_rmw.h osd.h osd_ops.h osd_peering_pg.h xor.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd.o: osd.cpp osd.h http_client.h osd_ops.h osd_peering_pg.h ringloop.h
g++ $(CXXFLAGS) -c -o $@ $<
osd: ./libblockstore.so osd_main.cpp osd.h osd_ops.h $(OSD_OBJS)
g++ $(CXXFLAGS) -o osd osd_main.cpp $(OSD_OBJS) ./libblockstore.so -ltcmalloc_minimal -luring
stub_osd: stub_osd.cpp osd_ops.h rw_blocking.o
g++ $(CXXFLAGS) -o stub_osd stub_osd.cpp rw_blocking.o -ltcmalloc_minimal
stub_bench: stub_bench.cpp osd_ops.h rw_blocking.o
g++ $(CXXFLAGS) -o stub_bench stub_bench.cpp rw_blocking.o -ltcmalloc_minimal
rw_blocking.o: rw_blocking.cpp rw_blocking.h
g++ $(CXXFLAGS) -c -o $@ $<
osd_test: osd_test.cpp osd_ops.h rw_blocking.o
g++ $(CXXFLAGS) -o osd_test osd_test.cpp rw_blocking.o -ltcmalloc_minimal
osd_peering_pg_test: osd_peering_pg_test.cpp osd_peering_pg.o
g++ $(CXXFLAGS) -o $@ $< osd_peering_pg.o -ltcmalloc_minimal
libfio_sec_osd.so: fio_sec_osd.cpp osd_ops.h rw_blocking.o
g++ $(CXXFLAGS) -ltcmalloc_minimal -shared -o libfio_sec_osd.so fio_sec_osd.cpp rw_blocking.o -luring
test_blockstore: ./libblockstore.so test_blockstore.cpp timerfd_interval.o
g++ $(CXXFLAGS) -o test_blockstore test_blockstore.cpp timerfd_interval.o ./libblockstore.so -ltcmalloc_minimal -luring
test: test.cpp osd_peering_pg.o
g++ $(CXXFLAGS) -o test test.cpp osd_peering_pg.o -luring -lm
test_allocator: test_allocator.cpp allocator.o
g++ $(CXXFLAGS) -o test_allocator test_allocator.cpp allocator.o

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## Vitastor
[Read English version](README.md)
## Идея
Я всего лишь хочу сделать качественную блочную SDS!
Vitastor - распределённая блочная SDS, прямой аналог Ceph RBD и внутренних СХД популярных
облачных провайдеров. Однако, в отличие от них, Vitastor быстрый и при этом простой.
Только пока маленький :-).
Архитектурная схожесть с Ceph означает заложенную на уровне алгоритмов записи строгую консистентность,
репликацию через первичный OSD, симметричную кластеризацию без единой точки отказа
и автоматическое распределение данных по любому числу дисков любого размера с настраиваемыми схемами
избыточности - репликацией или с произвольными кодами коррекции ошибок.
## Возможности
Vitastor на данный момент находится в статусе предварительного выпуска, расширенные
возможности пока отсутствуют, а в будущих версиях вероятны "ломающие" изменения.
Однако следующее уже реализовано:
- Базовая часть - надёжное кластерное блочное хранилище без единой точки отказа
- Производительность ;-D
- Несколько схем отказоустойчивости: репликация, XOR n+1 (1 диск чётности), коды коррекции ошибок
Рида-Соломона на основе библиотеки jerasure с любым числом дисков данных и чётности в группе
- Конфигурация через простые человекочитаемые JSON-структуры в etcd
- Автоматическое распределение данных по OSD, с поддержкой:
- Математической оптимизации для лучшей равномерности распределения и минимизации перемещений данных
- Нескольких пулов с разными схемами избыточности
- Дерева распределения, выбора OSD по тегам / классам устройств (только SSD, только HDD) и по поддереву
- Настраиваемых доменов отказа (диск/сервер/стойка и т.п.)
- Восстановление деградированных блоков
- Ребаланс, то есть перемещение данных между OSD (дисками)
- Поддержка "ленивого" fsync (fsync не на каждую операцию)
- Сбор статистики ввода/вывода в etcd
- Клиентская библиотека режима пользователя для ввода/вывода
- Драйвер диска для QEMU (собирается вне дерева исходников QEMU)
- Драйвер диска для утилиты тестирования производительности fio (также собирается вне дерева исходников fio)
- NBD-прокси для монтирования образов ядром ("блочное устройство в режиме пользователя")
- Утилита удаления образов/инодов (vitastor-rm)
- Пакеты для Debian и CentOS
- Статистика операций ввода/вывода и занятого места в разрезе инодов
- Именование инодов через хранение их метаданных в etcd
- Снапшоты и copy-on-write клоны
## Планы разработки
- Более корректные скрипты разметки дисков и автоматического запуска OSD
- Другие инструменты администрирования
- Плагины для OpenStack, Kubernetes, OpenNebula, Proxmox и других облачных систем
- iSCSI-прокси
- Таймауты операций и более быстрое выявление отказов
- Фоновая проверка целостности без контрольных сумм (сверка реплик)
- Контрольные суммы
- Оптимизации для гибридных SSD+HDD хранилищ
- Поддержка RDMA и NVDIMM
- Web-интерфейс
- Возможно, сжатие
- Возможно, поддержка кэширования данных через системный page cache
## Архитектура
Так же, как и в Ceph, в Vitastor:
- Есть пулы (pools), PG, OSD, мониторы, домены отказа, дерево распределения (аналог crush-дерева).
- Образы делятся на блоки фиксированного размера (объекты), и эти объекты распределяются по OSD.
- У OSD есть журнал и метаданные и они тоже могут размещаться на отдельных быстрых дисках.
- Все операции записи тоже транзакционны. В Vitastor, правда, есть режим отложенного/ленивого fsync
(коммита), в котором fsync не вызывается на каждую операцию записи, что делает его более
пригодным для использования на "плохих" (десктопных) SSD. Однако все операции записи
в любом случае атомарны.
- Клиентская библиотека тоже старается ждать восстановления после любого отказа кластера, то есть,
вы тоже можете перезагрузить хоть весь кластер разом, и клиенты только на время зависнут,
но не отключатся.
Некоторые базовые термины для тех, кто не знаком с Ceph:
- OSD (Object Storage Daemon) - процесс, который хранит данные на одном диске и обрабатывает
запросы чтения/записи от клиентов.
- Пул (Pool) - контейнер для данных, имеющих одну и ту же схему избыточности и правила распределения по OSD.
- PG (Placement Group) - группа объектов, хранимых на одном и том же наборе реплик (OSD).
Несколько PG могут храниться на одном и том же наборе реплик, но объекты одной PG
в норме не хранятся на разных наборах OSD.
- Монитор - демон, хранящий состояние кластера.
- Домен отказа (Failure Domain) - группа OSD, которым вы разрешаете "упасть" всем вместе.
Иными словами, это группа OSD, в которые СХД не помещает разные копии одного и того же
блока данных. Например, если домен отказа - сервер, то на двух дисках одного сервера
никогда не окажется 2 и более копий одного и того же блока данных, а значит, даже
если в этом сервере откажут все диски, это будет равносильно потере только 1 копии
любого блока данных.
- Дерево распределения (Placement Tree / CRUSH Tree) - иерархическая группировка OSD
в узлы, которые далее можно использовать как домены отказа. То есть, диск (OSD) входит в
сервер, сервер входит в стойку, стойка входит в ряд, ряд в датацентр и т.п.
Чем Vitastor отличается от Ceph:
- Vitastor в первую очередь сфокусирован на SSD. Также Vitastor, вероятно, должен неплохо работать
с комбинацией SSD и HDD через bcache, а в будущем, возможно, будут добавлены и нативные способы
оптимизации под SSD+HDD. Однако хранилище на основе одних лишь жёстких дисков, вообще без SSD,
не в приоритете, поэтому оптимизации под этот кейс могут вообще не состояться.
- OSD Vitastor однопоточный и всегда таким останется, так как это самый оптимальный способ работы.
Если вам не хватает 1 ядра на 1 диск, просто делите диск на разделы и запускайте на нём несколько OSD.
Но, скорее всего, вам хватит и 1 ядра - Vitastor не так прожорлив к ресурсам CPU, как Ceph.
- Журнал и метаданные всегда размещаются в памяти, благодаря чему никогда не тратится лишнее время
на чтение метаданных с диска. Размер метаданных линейно зависит от размера диска и блока данных,
который задаётся в конфигурации кластера и по умолчанию составляет 128 КБ. С блоком 128 КБ метаданные
занимают примерно 512 МБ памяти на 1 ТБ дискового пространства (и это всё равно меньше, чем нужно Ceph-у).
Журнал вообще не должен быть большим, например, тесты производительности в данном документе проводились
с журналом размером всего 16 МБ. Большой журнал, вероятно, даже вреден, т.к. "грязные" записи (записи,
не сброшенные из журнала) тоже занимают память и могут немного замедлять работу.
- В Vitastor нет внутреннего copy-on-write. Я считаю, что реализация CoW-хранилища гораздо сложнее,
поэтому сложнее добиться устойчиво хороших результатов. Возможно, в один прекрасный день
я придумаю красивый алгоритм для CoW-хранилища, но пока нет - внутреннего CoW в Vitastor не будет.
Всё это не относится к "внешнему" CoW (снапшотам и клонам).
- Базовый слой Vitastor - простое блочное хранилище с блоками фиксированного размера, а не сложное
объектное хранилище с расширенными возможностями, как в Ceph (RADOS).
- В Vitastor есть режим "ленивых fsync", в котором OSD группирует запросы записи перед сбросом их
на диск, что позволяет получить лучшую производительность с дешёвыми настольными SSD без конденсаторов
("Advanced Power Loss Protection" / "Capacitor-Based Power Loss Protection").
Тем не менее, такой режим всё равно медленнее использования нормальных серверных SSD и мгновенного
fsync, так как приводит к дополнительным операциям передачи данных по сети, поэтому рекомендуется
всё-таки использовать хорошие серверные диски, тем более, стоят они почти так же, как десктопные.
- PG эфемерны. Это означает, что они не хранятся на дисках и существуют только в памяти работающих OSD.
- Процессы восстановления оперируют отдельными объектами, а не целыми PG.
- PGLOG-ов нет.
- "Мониторы" не хранят данные. Конфигурация и состояние кластера хранятся в etcd в простых человекочитаемых
JSON-структурах. Мониторы Vitastor только следят за состоянием кластера и управляют перемещением данных.
В этом смысле монитор Vitastor не является критичным компонентом системы и больше похож на Ceph-овский
менеджер (MGR). Монитор Vitastor написан на node.js.
- Распределение PG не основано на консистентных хешах. Вместо этого все маппинги PG хранятся прямо в etcd
(ибо нет никакой проблемы сохранить несколько сотен-тысяч записей в памяти, а не считать каждый раз хеши).
Перераспределение PG по OSD выполняется через математическую оптимизацию,
а конкретно, сведение задачи к ЛП (задаче линейного программирования) и решение оной с помощью утилиты
lp_solve. Такой подход позволяет обычно выравнивать распределение места почти идеально - равномерность
обычно составляет 96-99%, в отличие от Ceph, где на голом CRUSH-е без балансировщика обычно выходит 80-90%.
Также это позволяет минимизировать объём перемещения данных и случайность связей между OSD, а также менять
распределение вручную, не боясь сломать логику перебалансировки. В таком подходе есть и потенциальный
недостаток - есть предположение, что в очень большом кластере он может сломаться - однако вплоть до
нескольких сотен OSD подход точно работает нормально. Ну и, собственно, при необходимости легко
реализовать и консистентные хеши.
- Отдельный слой, подобный слою "CRUSH-правил", отсутствует. Вы настраиваете схемы отказоустойчивости,
домены отказа и правила выбора OSD напрямую в конфигурации пулов.
## Понимание сути производительности систем хранения
Вкратце: для быстрой хранилки задержки важнее, чем пиковые iops-ы.
Лучшая возможная задержка достигается при тестировании в 1 поток с глубиной очереди 1,
что приблизительно означает минимально нагруженное состояние кластера. В данном случае
IOPS = 1/задержка. Ни числом серверов, ни дисков, ни серверных процессов/потоков
задержка не масштабируется... Она зависит только от того, насколько быстро один
серверный процесс (и клиент) обрабатывают одну операцию.
Почему задержки важны? Потому, что некоторые приложения *не могут* использовать глубину
очереди больше 1, ибо их задача не параллелизуется. Важный пример - это все СУБД
с поддержкой консистентности (ACID), потому что все они обеспечивают её через
журналирование, а журналы пишутся последовательно и с fsync() после каждой операции.
fsync, кстати - это ещё одна очень важная вещь, про которую почти всегда забывают в тестах.
Смысл в том, что все современные диски имеют кэши/буферы записи и не гарантируют, что
данные реально физически записываются на носитель до того, как вы делаете fsync(),
который транслируется в команду сброса кэша операционной системой.
Дешёвые SSD для настольных ПК и ноутбуков очень быстрые без fsync - NVMe диски, например,
могут обработать порядка 80000 операций записи в секунду с глубиной очереди 1 без fsync.
Однако с fsync, когда они реально вынуждены писать каждый блок данных во флеш-память,
они выжимают лишь 1000-2000 операций записи в секунду (число практически постоянное
для всех моделей SSD).
Серверные SSD часто имеют суперконденсаторы, работающие как встроенный источник
бесперебойного питания и дающие дискам успеть сбросить их DRAM-кэш в постоянную
флеш-память при отключении питания. Благодаря этому диски с чистой совестью
*игнорируют fsync*, так как точно знают, что данные из кэша доедут до постоянной
памяти.
Все наиболее известные программные СХД, например, Ceph и внутренние СХД, используемые
такими облачными провайдерами, как Amazon, Google, Яндекс, медленные в смысле задержки.
В лучшем случае они дают задержки от 0.3мс на чтение и 0.6мс на запись 4 КБ блоками
даже при условии использования наилучшего возможного железа.
И это в эпоху SSD, когда вы можете пойти на рынок и купить там SSD, задержка которого
на чтение будет 0.1мс, а на запись - 0.04мс, за 100$ или даже дешевле.
Когда мне нужно быстро протестировать производительность дисковой подсистемы, я
использую следующие 6 команд, с небольшими вариациями:
- Линейная запись:
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4M -iodepth=32 -rw=write -runtime=60 -filename=/dev/sdX`
- Линейное чтение:
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4M -iodepth=32 -rw=read -runtime=60 -filename=/dev/sdX`
- Запись в 1 поток (T1Q1):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=1 -fsync=1 -rw=randwrite -runtime=60 -filename=/dev/sdX`
- Чтение в 1 поток (T1Q1):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=1 -rw=randread -runtime=60 -filename=/dev/sdX`
- Параллельная запись (numjobs используется, когда 1 ядро CPU не может насытить диск):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=128 [-numjobs=4 -group_reporting] -rw=randwrite -runtime=60 -filename=/dev/sdX`
- Параллельное чтение (numjobs - аналогично):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=128 [-numjobs=4 -group_reporting] -rw=randread -runtime=60 -filename=/dev/sdX`
## Теоретическая максимальная производительность Vitastor
При использовании репликации:
- Задержка чтения в 1 поток (T1Q1): 1 сетевой RTT + 1 чтение с диска.
- Запись+fsync в 1 поток:
- С мгновенным сбросом: 2 RTT + 1 запись.
- С отложенным ("ленивым") сбросом: 4 RTT + 1 запись + 1 fsync.
- Параллельное чтение: сумма IOPS всех дисков либо производительность сети, если в сеть упрётся раньше.
- Параллельная запись: сумма IOPS всех дисков / число реплик / WA либо производительность сети, если в сеть упрётся раньше.
При использовании кодов коррекции ошибок (EC):
- Задержка чтения в 1 поток (T1Q1): 1.5 RTT + 1 чтение.
- Запись+fsync в 1 поток:
- С мгновенным сбросом: 3.5 RTT + 1 чтение + 2 записи.
- С отложенным ("ленивым") сбросом: 5.5 RTT + 1 чтение + 2 записи + 2 fsync.
- Под 0.5 на самом деле подразумевается (k-1)/k, где k - число дисков данных,
что означает, что дополнительное обращение по сети не нужно, когда операция
чтения обслуживается локально.
- Параллельное чтение: сумма IOPS всех дисков либо производительность сети, если в сеть упрётся раньше.
- Параллельная запись: сумма IOPS всех дисков / общее число дисков данных и чётности / WA либо производительность сети, если в сеть упрётся раньше.
Примечание: IOPS дисков в данном случае надо брать в смешанном режиме чтения/записи в пропорции, аналогичной формулам выше.
WA (мультипликатор записи) для 4 КБ блоков в Vitastor обычно составляет 3-5:
1. Запись метаданных в журнал
2. Запись блока данных в журнал
3. Запись метаданных в БД
4. Ещё одна запись метаданных в журнал при использовании EC
5. Запись блока данных на диск данных
Если вы найдёте SSD, хорошо работающий с 512-байтными блоками данных (Optane?),
то 1, 3 и 4 можно снизить до 512 байт (1/8 от размера данных) и получить WA всего 2.375.
Кроме того, WA снижается при использовании отложенного/ленивого сброса при параллельной
нагрузке, т.к. блоки журнала записываются на диск только когда они заполняются или явным
образом запрашивается fsync.
## Пример сравнения с Ceph
Железо - 4 сервера, в каждом:
- 6x SATA SSD Intel D3-4510 3.84 TB
- 2x Xeon Gold 6242 (16 cores @ 2.8 GHz)
- 384 GB RAM
- 1x 25 GbE сетевая карта (Mellanox ConnectX-4 LX), подключённая к свитчу Juniper QFX5200
Экономия энергии CPU отключена. В тестах и Vitastor, и Ceph развёрнуто по 2 OSD на 1 SSD.
Все результаты ниже относятся к случайной нагрузке 4 КБ блоками (если явно не указано обратное).
Производительность голых дисков:
- T1Q1 запись ~27000 iops (задержка ~0.037ms)
- T1Q1 чтение ~9800 iops (задержка ~0.101ms)
- T1Q32 запись ~60000 iops
- T1Q32 чтение ~81700 iops
Ceph 15.2.4 (Bluestore):
- T1Q1 запись ~1000 iops (задержка ~1ms)
- T1Q1 чтение ~1750 iops (задержка ~0.57ms)
- T8Q64 запись ~100000 iops, потребление CPU процессами OSD около 40 ядер на каждом сервере
- T8Q64 чтение ~480000 iops, потребление CPU процессами OSD около 40 ядер на каждом сервере
Тесты в 8 потоков проводились на 8 400GB RBD образах со всех хостов (с каждого хоста запускалось 2 процесса fio).
Это нужно потому, что в Ceph несколько RBD-клиентов, пишущих в 1 образ, очень сильно замедляются.
Настройки RocksDB и Bluestore в Ceph не менялись, единственным изменением было отключение cephx_sign_messages.
На самом деле, результаты теста не такие уж и плохие для Ceph (могло быть хуже).
Собственно говоря, эти серверы как раз хорошо сбалансированы для Ceph - 6 SATA SSD как раз
утилизируют 25-гигабитную сеть, а без 2 мощных процессоров Ceph-у бы не хватило ядер,
чтобы выдать пристойный результат. Собственно, что и показывает жор 40 ядер в процессе
параллельного теста.
Vitastor:
- T1Q1 запись: 7087 iops (задержка 0.14ms)
- T1Q1 чтение: 6838 iops (задержка 0.145ms)
- T2Q64 запись: 162000 iops, потребление CPU - 3 ядра на каждом сервере
- T8Q64 чтение: 895000 iops, потребление CPU - 4 ядра на каждом сервере
- Линейная запись (4M T1Q32): 2800 МБ/с
- Линейное чтение (4M T1Q32): 1500 МБ/с
Тест на чтение в 8 потоков проводился на 1 большом образе (3.2 ТБ) со всех хостов (опять же, по 2 fio с каждого).
В Vitastor никакой разницы между 1 образом и 8-ю нет. Естественно, примерно 1/4 запросов чтения
в такой конфигурации, как и в тестах Ceph выше, обслуживалась с локальной машины. Если проводить
тест так, чтобы все операции всегда обращались к первичным OSD по сети - тест сильнее упирался
в сеть и результат составлял примерно 689000 iops.
Настройки Vitastor: `--disable_data_fsync true --immediate_commit all --flusher_count 8
--disk_alignment 4096 --journal_block_size 4096 --meta_block_size 4096
--journal_no_same_sector_overwrites true --journal_sector_buffer_count 1024
--journal_size 16777216`.
### EC/XOR 2+1
Vitastor:
- T1Q1 запись: 2808 iops (задержка ~0.355ms)
- T1Q1 чтение: 6190 iops (задержка ~0.16ms)
- T2Q64 запись: 85500 iops, потребление CPU - 3.4 ядра на каждом сервере
- T8Q64 чтение: 812000 iops, потребление CPU - 4.7 ядра на каждом сервере
- Линейная запись (4M T1Q32): 3200 МБ/с
- Линейное чтение (4M T1Q32): 1800 МБ/с
Ceph:
- T1Q1 запись: 730 iops (задержка ~1.37ms latency)
- T1Q1 чтение: 1500 iops с холодным кэшем метаданных (задержка ~0.66ms), 2300 iops через 2 минуты прогрева (задержка ~0.435ms)
- T4Q128 запись (4 RBD images): 45300 iops, потребление CPU - 30 ядер на каждом сервере
- T8Q64 чтение (4 RBD images): 278600 iops, потребление CPU - 40 ядер на каждом сервере
- Линейная запись (4M T1Q32): 1950 МБ/с в пустой образ, 2500 МБ/с в заполненный образ
- Линейное чтение (4M T1Q32): 2400 МБ/с
### NBD
NBD - на данный момент единственный способ монтировать Vitastor ядром Linux, но он
приводит к дополнительным копированиям данных, поэтому немного ухудшает производительность,
правда, в основном - линейную, а случайная затрагивается слабо.
NBD расшифровывается как "сетевое блочное устройство", но на самом деле оно также
работает просто как аналог FUSE для блочных устройств, то есть, представляет собой
"блочное устройство в пространстве пользователя".
Vitastor с однопоточной NBD прокси на том же стенде:
- T1Q1 запись: 6000 iops (задержка 0.166ms)
- T1Q1 чтение: 5518 iops (задержка 0.18ms)
- T1Q128 запись: 94400 iops
- T1Q128 чтение: 103000 iops
- Линейная запись (4M T1Q128): 1266 МБ/с (в сравнении с 2800 МБ/с через fio)
- Линейное чтение (4M T1Q128): 975 МБ/с (в сравнении с 1500 МБ/с через fio)
## Установка
### Debian
- Добавьте ключ репозитория Vitastor:
`wget -q -O - https://vitastor.io/debian/pubkey | sudo apt-key add -`
- Добавьте репозиторий Vitastor в /etc/apt/sources.list:
- Debian 11 (Bullseye/Sid): `deb https://vitastor.io/debian bullseye main`
- Debian 10 (Buster): `deb https://vitastor.io/debian buster main`
- Для Debian 10 (Buster) также включите репозиторий backports:
`deb http://deb.debian.org/debian buster-backports main`
- Установите пакеты: `apt update; apt install vitastor lp-solve etcd linux-image-amd64 qemu`
### CentOS
- Добавьте в систему репозиторий Vitastor:
- CentOS 7: `yum install https://vitastor.io/rpms/centos/7/vitastor-release-1.0-1.el7.noarch.rpm`
- CentOS 8: `dnf install https://vitastor.io/rpms/centos/8/vitastor-release-1.0-1.el8.noarch.rpm`
- Включите EPEL: `yum/dnf install epel-release`
- Включите дополнительные репозитории CentOS:
- CentOS 7: `yum install centos-release-scl`
- CentOS 8: `dnf install centos-release-advanced-virtualization`
- Включите elrepo-kernel:
- CentOS 7: `yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm`
- CentOS 8: `dnf install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm`
- Установите пакеты: `yum/dnf install vitastor lpsolve etcd kernel-ml qemu-kvm`
### Установка из исходников
- Установите ядро 5.4 или более новое, для поддержки io_uring. Желательно 5.8 или даже новее,
так как в 5.4 есть как минимум 1 известный баг, ведущий к зависанию с io_uring и контроллером HP SmartArray.
- Установите liburing 0.4 или более новый и его заголовки.
- Установите lp_solve.
- Установите etcd. Внимание: вам нужна версия с исправлением отсюда: https://github.com/vitalif/etcd/,
из ветки release-3.4, так как в etcd есть баг, который [будет](https://github.com/etcd-io/etcd/pull/12402)
исправлен только в 3.4.15. Баг приводит к неспособности Vitastor запустить PG, когда их хотя бы 500 штук.
- Установите node.js 10 или новее.
- Установите gcc и g++ 8.x или новее.
- Склонируйте данный репозиторий с подмодулями: `git clone https://yourcmc.ru/git/vitalif/vitastor/`.
- Желательно пересобрать QEMU с патчем, который делает необязательным запуск через LD_PRELOAD.
См `qemu-*.*-vitastor.patch` - выберите версию, наиболее близкую вашей версии QEMU.
- Установите QEMU 3.0 или новее, возьмите исходные коды установленного пакета, начните его пересборку,
через некоторое время остановите её и скопируйте следующие заголовки:
- `<qemu>/include` &rarr; `<vitastor>/qemu/include`
- Debian:
* Берите qemu из основного репозитория
* `<qemu>/b/qemu/config-host.h` &rarr; `<vitastor>/qemu/b/qemu/config-host.h`
* `<qemu>/b/qemu/qapi` &rarr; `<vitastor>/qemu/b/qemu/qapi`
- CentOS 8:
* Берите qemu из репозитория Advanced-Virtualization. Чтобы включить его, запустите
`yum install centos-release-advanced-virtualization.noarch` и далее `yum install qemu`
* `<qemu>/config-host.h` &rarr; `<vitastor>/qemu/b/qemu/config-host.h`
* Для QEMU 3.0+: `<qemu>/qapi` &rarr; `<vitastor>/qemu/b/qemu/qapi`
* Для QEMU 2.0+: `<qemu>/qapi-types.h` &rarr; `<vitastor>/qemu/b/qemu/qapi-types.h`
- `config-host.h` и `qapi` нужны, т.к. в них содержатся автогенерируемые заголовки
- Установите fio 3.7 или новее, возьмите исходники пакета и сделайте на них симлинк с `<vitastor>/fio`.
- Соберите и установите Vitastor командой `mkdir build && cd build && cmake .. && make -j8 && make install`.
Обратите внимание на переменную cmake `QEMU_PLUGINDIR` - под RHEL её нужно установить равной `qemu-kvm`.
## Запуск
Внимание: процедура пока что достаточно нетривиальная, задавать конфигурацию и смещения
на диске нужно почти вручную. Это будет исправлено в ближайшем будущем.
- Желательны SATA SSD или NVMe диски с конденсаторами (серверные SSD). Можно использовать и
десктопные SSD, включив режим отложенного fsync, но производительность однопоточной записи
в этом случае пострадает.
- Быстрая сеть, минимум 10 гбит/с
- Для наилучшей производительности нужно отключить энергосбережение CPU: `cpupower idle-set -D 0 && cpupower frequency-set -g performance`.
- Пропишите нужные вам значения вверху файлов `/usr/lib/vitastor/mon/make-units.sh` и `/usr/lib/vitastor/mon/make-osd.sh`.
- Создайте юниты systemd для etcd и мониторов: `/usr/lib/vitastor/mon/make-units.sh`
- Создайте юниты для OSD: `/usr/lib/vitastor/mon/make-osd.sh /dev/disk/by-partuuid/XXX [/dev/disk/by-partuuid/YYY ...]`
- Вы можете поменять параметры OSD в юнитах systemd. Смысл некоторых параметров:
- `disable_data_fsync 1` - отключает fsync, используется с SSD с конденсаторами.
- `immediate_commit all` - используется с SSD с конденсаторами.
- `disable_device_lock 1` - отключает блокировку файла устройства, нужно, только если вы запускаете
несколько OSD на одном блочном устройстве.
- `flusher_count 256` - "flusher" - микропоток, удаляющий старые данные из журнала.
Не волнуйтесь об этой настройке, 256 теперь достаточно практически всегда.
- `disk_alignment`, `journal_block_size`, `meta_block_size` следует установить равными размеру
внутреннего блока SSD. Это почти всегда 4096.
- `journal_no_same_sector_overwrites true` запрещает перезапись одного и того же сектора журнала подряд
много раз в процессе записи. Большинство (99%) SSD не нуждаются в данной опции. Однако выяснилось, что
диски, используемые на одном из тестовых стендов - Intel D3-S4510 - очень сильно не любят такую
перезапись, и для них была добавлена эта опция. Когда данный режим включён, также нужно поднимать
значение `journal_sector_buffer_count`, так как иначе Vitastor не хватит буферов для записи в журнал.
- Запустите все etcd: `systemctl start etcd`
- Создайте глобальную конфигурацию в etcd: `etcdctl --endpoints=... put /vitastor/config/global '{"immediate_commit":"all"}'`
(если все ваши диски - серверные с конденсаторами).
- Создайте пулы: `etcdctl --endpoints=... put /vitastor/config/pools '{"1":{"name":"testpool","scheme":"replicated","pg_size":2,"pg_minsize":1,"pg_count":256,"failure_domain":"host"}}'`.
Для jerasure EC-пулов конфигурация должна выглядеть так: `2:{"name":"ecpool","scheme":"jerasure","pg_size":4,"parity_chunks":2,"pg_minsize":2,"pg_count":256,"failure_domain":"host"}`.
- Запустите все OSD: `systemctl start vitastor.target`
- Ваш кластер должен быть готов - один из мониторов должен уже сконфигурировать PG, а OSD должны запустить их.
- Вы можете проверить состояние PG прямо в etcd: `etcdctl --endpoints=... get --prefix /vitastor/pg/state`. Все PG должны быть 'active'.
- Пример команды для запуска тестов: `fio -thread -ioengine=libfio_vitastor.so -name=test -bs=4M -direct=1 -iodepth=16 -rw=write -etcd=10.115.0.10:2379/v3 -pool=1 -inode=1 -size=400G`.
- Пример команды для заливки образа ВМ в vitastor через qemu-img:
```
qemu-img convert -f qcow2 debian10.qcow2 -p -O raw 'vitastor:etcd_host=10.115.0.10\:2379/v3:pool=1:inode=1:size=2147483648'
```
Если вы используете немодифицированный QEMU, данной команде потребуется переменная окружения `LD_PRELOAD=/usr/lib/x86_64-linux-gnu/qemu/block-vitastor.so`.
- Пример команды запуска QEMU:
```
qemu-system-x86_64 -enable-kvm -m 1024
-drive 'file=vitastor:etcd_host=10.115.0.10\:2379/v3:pool=1:inode=1:size=2147483648',format=raw,if=none,id=drive-virtio-disk0,cache=none
-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1,write-cache=off,physical_block_size=4096,logical_block_size=512
-vnc 0.0.0.0:0
```
- Пример команды удаления образа (инода) из Vitastor:
```
vitastor-rm --etcd_address 10.115.0.10:2379/v3 --pool 1 --inode 1 --parallel_osds 16 --iodepth 32
```
## Известные проблемы
- Запросы удаления объектов могут в данный момент приводить к "неполным" объектам в EC-пулах,
если в процессе удаления произойдут отказы OSD или серверов, потому что правильная обработка
запросов удаления в кластере должна быть "трёхфазной", а это пока не реализовано. Если вы
столкнётесь с такой ситуацией, просто повторите запрос удаления.
## Принципы реализации
- Я люблю архитектурно простые решения. Vitastor проектируется именно так и я намерен
и далее следовать данному принципу.
- Если вы пришли сюда за идеальным кодом на C++, вы, вероятно, не по адресу. "Общепринятые"
практики написания C++ кода меня не очень волнуют, так как зачастую, опять-таки, ведут к
излишним усложнениям и код получается красивый... но медленный.
- По той же причине в коде иногда можно встретить велосипеды типа собственного упрощённого
HTTP-клиента для работы с etcd. Зато эти велосипеды маленькие и компактные и не требуют
использования десятка внешних библиотек.
- node.js для монитора - не случайный выбор. Он очень быстрый, имеет встроенную событийную
машину, приятный нейтральный C-подобный язык программирования и развитую инфраструктуру.
## Автор и лицензия
Автор: Виталий Филиппов (vitalif [at] yourcmc.ru), 2019+
Заходите в Telegram-чат Vitastor: https://t.me/vitastor
Лицензия: VNPL 1.1 на серверный код и двойная VNPL 1.1 + GPL 2.0+ на клиентский.
VNPL - "сетевой копилефт", собственная свободная копилефт-лицензия
Vitastor Network Public License 1.1, основанная на GNU GPL 3.0 с дополнительным
условием "Сетевого взаимодействия", требующим распространять все программы,
специально разработанные для использования вместе с Vitastor и взаимодействующие
с ним по сети, под лицензией VNPL или под любой другой свободной лицензией.
Идея VNPL - расширение действия копилефта не только на модули, явным образом
связываемые с кодом Vitastor, но также на модули, оформленные в виде микросервисов
и взаимодействующие с ним по сети.
Таким образом, если вы хотите построить на основе Vitastor сервис, содержаший
компоненты с закрытым кодом, взаимодействующие с Vitastor, вам нужна коммерческая
лицензия от автора 😀.
На Windows и любое другое ПО, не разработанное *специально* для использования
вместе с Vitastor, никакие ограничения не накладываются.
Клиентские библиотеки распространяются на условиях двойной лицензии VNPL 1.0
и также на условиях GNU GPL 2.0 или более поздней версии. Так сделано в целях
совместимости с таким ПО, как QEMU и fio.
Вы можете найти полный текст VNPL 1.1 в файле [VNPL-1.1.txt](VNPL-1.1.txt),
а GPL 2.0 в файле [GPL-2.0.txt](GPL-2.0.txt).

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## Vitastor
[Читать на русском](README-ru.md)
## The Idea
Make Software-Defined Block Storage Great Again.
Vitastor is a small, simple and fast clustered block storage (storage for VM drives),
architecturally similar to Ceph which means strong consistency, primary-replication, symmetric
clustering and automatic data distribution over any number of drives of any size
with configurable redundancy (replication or erasure codes/XOR).
## Features
Vitastor is currently a pre-release, a lot of features are missing and you can still expect
breaking changes in the future. However, the following is implemented:
- Basic part: highly-available block storage with symmetric clustering and no SPOF
- Performance ;-D
- Multiple redundancy schemes: Replication, XOR n+1, Reed-Solomon erasure codes
based on jerasure library with any number of data and parity drives in a group
- Configuration via simple JSON data structures in etcd
- Automatic data distribution over OSDs, with support for:
- Mathematical optimization for better uniformity and less data movement
- Multiple pools
- Placement tree, OSD selection by tags (device classes) and placement root
- Configurable failure domains
- Recovery of degraded blocks
- Rebalancing (data movement between OSDs)
- Lazy fsync support
- I/O statistics reporting to etcd
- Generic user-space client library
- QEMU driver (built out-of-tree)
- Loadable fio engine for benchmarks (also built out-of-tree)
- NBD proxy for kernel mounts
- Inode removal tool (vitastor-rm)
- Packaging for Debian and CentOS
- Per-inode I/O and space usage statistics
- Inode metadata storage in etcd
- Snapshots and copy-on-write image clones
## Roadmap
- Better OSD creation and auto-start tools
- Other administrative tools
- Plugins for OpenStack, Kubernetes, OpenNebula, Proxmox and other cloud systems
- iSCSI proxy
- Operation timeouts and better failure detection
- Scrubbing without checksums (verification of replicas)
- Checksums
- SSD+HDD optimizations, possibly including tiered storage and soft journal flushes
- RDMA and NVDIMM support
- Web GUI
- Compression (possibly)
- Read caching using system page cache (possibly)
## Architecture
Similarities:
- Just like Ceph, Vitastor has Pools, PGs, OSDs, Monitors, Failure Domains, Placement Tree.
- Just like Ceph, Vitastor is transactional (even though there's a "lazy fsync mode" which
doesn't implicitly flush every operation to disks).
- OSDs also have journal and metadata and they can also be put on separate drives.
- Just like in Ceph, client library attempts to recover from any cluster failure so
you can basically reboot the whole cluster and only pause, but not crash, your clients
(I consider this a bug if the client crashes in that case).
Some basic terms for people not familiar with Ceph:
- OSD (Object Storage Daemon) is a process that stores data and serves read/write requests.
- PG (Placement Group) is a container for data that (normally) shares the same replicas.
- Pool is a container for data that has the same redundancy scheme and placement rules.
- Monitor is a separate daemon that watches cluster state and handles failures.
- Failure Domain is a group of OSDs that you allow to fail. It's "host" by default.
- Placement Tree groups OSDs in a hierarchy to later split them into Failure Domains.
Architectural differences from Ceph:
- Vitastor's primary focus is on SSDs. Proper SSD+HDD optimizations may be added in the future, though.
- Vitastor OSD is (and will always be) single-threaded. If you want to dedicate more than 1 core
per drive you should run multiple OSDs each on a different partition of the drive.
Vitastor isn't CPU-hungry though (as opposed to Ceph), so 1 core is sufficient in a lot of cases.
- Metadata and journal are always kept in memory. Metadata size depends linearly on drive capacity
and data store block size which is 128 KB by default. With 128 KB blocks metadata should occupy
around 512 MB per 1 TB (which is still less than Ceph wants). Journal doesn't have to be big,
the example test below was conducted with only 16 MB journal. A big journal is probably even
harmful as dirty write metadata also take some memory.
- Vitastor storage layer doesn't have internal copy-on-write or redirect-write. I know that maybe
it's possible to create a good copy-on-write storage, but it's much harder and makes performance
less deterministic, so CoW isn't used in Vitastor.
- The basic layer of Vitastor is block storage with fixed-size blocks, not object storage with
rich semantics like in Ceph (RADOS).
- There's a "lazy fsync" mode which allows to batch writes before flushing them to the disk.
This allows to use Vitastor with desktop SSDs, but still lowers performance due to additional
network roundtrips, so use server SSDs with capacitor-based power loss protection
("Advanced Power Loss Protection") for best performance.
- PGs are ephemeral. This means that they aren't stored on data disks and only exist in memory
while OSDs are running.
- Recovery process is per-object (per-block), not per-PG. Also there are no PGLOGs.
- Monitors don't store data. Cluster configuration and state is stored in etcd in simple human-readable
JSON structures. Monitors only watch cluster state and handle data movement.
Thus Vitastor's Monitor isn't a critical component of the system and is more similar to Ceph's Manager.
Vitastor's Monitor is implemented in node.js.
- PG distribution isn't based on consistent hashes. All PG mappings are stored in etcd.
Rebalancing PGs between OSDs is done by mathematical optimization - data distribution problem
is reduced to a linear programming problem and solved by lp_solve. This allows for almost
perfect (96-99% uniformity compared to Ceph's 80-90%) data distribution in most cases, ability
to map PGs by hand without breaking rebalancing logic, reduced OSD peer-to-peer communication
(on average, OSDs have fewer peers) and less data movement. It also probably has a drawback -
this method may fail in very large clusters, but up to several hundreds of OSDs it's perfectly fine.
It's also easy to add consistent hashes in the future if something proves their necessity.
- There's no separate CRUSH layer. You select pool redundancy scheme, placement root, failure domain
and so on directly in pool configuration.
## Understanding Storage Performance
The most important thing for fast storage is latency, not parallel iops.
The best possible latency is achieved with one thread and queue depth of 1 which basically means
"client load as low as possible". In this case IOPS = 1/latency, and this number doesn't
scale with number of servers, drives, server processes or threads and so on.
Single-threaded IOPS and latency numbers only depend on *how fast a single daemon is*.
Why is it important? It's important because some of the applications *can't* use
queue depth greater than 1 because their task isn't parallelizable. A notable example
is any ACID DBMS because all of them write their WALs sequentially with fsync()s.
fsync, by the way, is another important thing often missing in benchmarks. The point is
that drives have cache buffers and don't guarantee that your data is actually persisted
until you call fsync() which is translated to a FLUSH CACHE command by the OS.
Desktop SSDs are very fast without fsync - NVMes, for example, can process ~80000 write
operations per second with queue depth of 1 without fsync - but they're really slow with
fsync because they have to actually write data to flash chips when you call fsync. Typical
number is around 1000-2000 iops with fsync.
Server SSDs often have supercapacitors that act as a built-in UPS and allow the drive
to flush its DRAM cache to the persistent flash storage when a power loss occurs.
This makes them perform equally well with and without fsync. This feature is called
"Advanced Power Loss Protection" by Intel; other vendors either call it similarly
or directly as "Full Capacitor-Based Power Loss Protection".
All software-defined storages that I currently know are slow in terms of latency.
Notable examples are Ceph and internal SDSes used by cloud providers like Amazon, Google,
Yandex and so on. They're all slow and can only reach ~0.3ms read and ~0.6ms 4 KB write latency
with best-in-slot hardware.
And that's in the SSD era when you can buy an SSD that has ~0.04ms latency for 100 $.
I use the following 6 commands with small variations to benchmark any storage:
- Linear write:
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4M -iodepth=32 -rw=write -runtime=60 -filename=/dev/sdX`
- Linear read:
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4M -iodepth=32 -rw=read -runtime=60 -filename=/dev/sdX`
- Random write latency (T1Q1, this hurts storages the most):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=1 -fsync=1 -rw=randwrite -runtime=60 -filename=/dev/sdX`
- Random read latency (T1Q1):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=1 -rw=randread -runtime=60 -filename=/dev/sdX`
- Parallel write iops (use numjobs if a single CPU core is insufficient to saturate the load):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=128 [-numjobs=4 -group_reporting] -rw=randwrite -runtime=60 -filename=/dev/sdX`
- Parallel read iops (use numjobs if a single CPU core is insufficient to saturate the load):
`fio -ioengine=libaio -direct=1 -invalidate=1 -name=test -bs=4k -iodepth=128 [-numjobs=4 -group_reporting] -rw=randread -runtime=60 -filename=/dev/sdX`
## Vitastor's Theoretical Maximum Random Access Performance
Replicated setups:
- Single-threaded (T1Q1) read latency: 1 network roundtrip + 1 disk read.
- Single-threaded write+fsync latency:
- With immediate commit: 2 network roundtrips + 1 disk write.
- With lazy commit: 4 network roundtrips + 1 disk write + 1 disk flush.
- Saturated parallel read iops: min(network bandwidth, sum(disk read iops)).
- Saturated parallel write iops: min(network bandwidth, sum(disk write iops / number of replicas / write amplification)).
EC/XOR setups:
- Single-threaded (T1Q1) read latency: 1.5 network roundtrips + 1 disk read.
- Single-threaded write+fsync latency:
- With immediate commit: 3.5 network roundtrips + 1 disk read + 2 disk writes.
- With lazy commit: 5.5 network roundtrips + 1 disk read + 2 disk writes + 2 disk fsyncs.
- 0.5 in actually (k-1)/k which means that an additional roundtrip doesn't happen when
the read sub-operation can be served locally.
- Saturated parallel read iops: min(network bandwidth, sum(disk read iops)).
- Saturated parallel write iops: min(network bandwidth, sum(disk write iops * number of data drives / (number of data + parity drives) / write amplification)).
In fact, you should put disk write iops under the condition of ~10% reads / ~90% writes in this formula.
Write amplification for 4 KB blocks is usually 3-5 in Vitastor:
1. Journal block write
2. Journal data write
3. Metadata block write
4. Another journal block write for EC/XOR setups
5. Data block write
If you manage to get an SSD which handles 512 byte blocks well (Optane?) you may
lower 1, 3 and 4 to 512 bytes (1/8 of data size) and get WA as low as 2.375.
Lazy fsync also reduces WA for parallel workloads because journal blocks are only
written when they fill up or fsync is requested.
## Example Comparison with Ceph
Hardware configuration: 4 nodes, each with:
- 6x SATA SSD Intel D3-4510 3.84 TB
- 2x Xeon Gold 6242 (16 cores @ 2.8 GHz)
- 384 GB RAM
- 1x 25 GbE network interface (Mellanox ConnectX-4 LX), connected to a Juniper QFX5200 switch
CPU powersaving was disabled. Both Vitastor and Ceph were configured with 2 OSDs per 1 SSD.
All of the results below apply to 4 KB blocks and random access (unless indicated otherwise).
Raw drive performance:
- T1Q1 write ~27000 iops (~0.037ms latency)
- T1Q1 read ~9800 iops (~0.101ms latency)
- T1Q32 write ~60000 iops
- T1Q32 read ~81700 iops
Ceph 15.2.4 (Bluestore):
- T1Q1 write ~1000 iops (~1ms latency)
- T1Q1 read ~1750 iops (~0.57ms latency)
- T8Q64 write ~100000 iops, total CPU usage by OSDs about 40 virtual cores on each node
- T8Q64 read ~480000 iops, total CPU usage by OSDs about 40 virtual cores on each node
T8Q64 tests were conducted over 8 400GB RBD images from all hosts (every host was running 2 instances of fio).
This is because Ceph has performance penalties related to running multiple clients over a single RBD image.
cephx_sign_messages was set to false during tests, RocksDB and Bluestore settings were left at defaults.
In fact, not that bad for Ceph. These servers are an example of well-balanced Ceph nodes.
However, CPU usage and I/O latency were through the roof, as usual.
Vitastor:
- T1Q1 write: 7087 iops (0.14ms latency)
- T1Q1 read: 6838 iops (0.145ms latency)
- T2Q64 write: 162000 iops, total CPU usage by OSDs about 3 virtual cores on each node
- T8Q64 read: 895000 iops, total CPU usage by OSDs about 4 virtual cores on each node
- Linear write (4M T1Q32): 2800 MB/s
- Linear read (4M T1Q32): 1500 MB/s
T8Q64 read test was conducted over 1 larger inode (3.2T) from all hosts (every host was running 2 instances of fio).
Vitastor has no performance penalties related to running multiple clients over a single inode.
If conducted from one node with all primary OSDs moved to other nodes the result was slightly lower (689000 iops),
this is because all operations resulted in network roundtrips between the client and the primary OSD.
When fio was colocated with OSDs (like in Ceph benchmarks above), 1/4 of the read workload actually
used the loopback network.
Vitastor was configured with: `--disable_data_fsync true --immediate_commit all --flusher_count 8
--disk_alignment 4096 --journal_block_size 4096 --meta_block_size 4096
--journal_no_same_sector_overwrites true --journal_sector_buffer_count 1024
--journal_size 16777216`.
### EC/XOR 2+1
Vitastor:
- T1Q1 write: 2808 iops (~0.355ms latency)
- T1Q1 read: 6190 iops (~0.16ms latency)
- T2Q64 write: 85500 iops, total CPU usage by OSDs about 3.4 virtual cores on each node
- T8Q64 read: 812000 iops, total CPU usage by OSDs about 4.7 virtual cores on each node
- Linear write (4M T1Q32): 3200 MB/s
- Linear read (4M T1Q32): 1800 MB/s
Ceph:
- T1Q1 write: 730 iops (~1.37ms latency)
- T1Q1 read: 1500 iops with cold cache (~0.66ms latency), 2300 iops after 2 minute metadata cache warmup (~0.435ms latency)
- T4Q128 write (4 RBD images): 45300 iops, total CPU usage by OSDs about 30 virtual cores on each node
- T8Q64 read (4 RBD images): 278600 iops, total CPU usage by OSDs about 40 virtual cores on each node
- Linear write (4M T1Q32): 1950 MB/s before preallocation, 2500 MB/s after preallocation
- Linear read (4M T1Q32): 2400 MB/s
### NBD
NBD is currently required to mount Vitastor via kernel, but it imposes additional overhead
due to additional copying between the kernel and userspace. This mostly hurts linear
bandwidth, not iops.
Vitastor with single-thread NBD on the same hardware:
- T1Q1 write: 6000 iops (0.166ms latency)
- T1Q1 read: 5518 iops (0.18ms latency)
- T1Q128 write: 94400 iops
- T1Q128 read: 103000 iops
- Linear write (4M T1Q128): 1266 MB/s (compared to 2800 MB/s via fio)
- Linear read (4M T1Q128): 975 MB/s (compared to 1500 MB/s via fio)
## Installation
### Debian
- Trust Vitastor package signing key:
`wget -q -O - https://vitastor.io/debian/pubkey | sudo apt-key add -`
- Add Vitastor package repository to your /etc/apt/sources.list:
- Debian 11 (Bullseye/Sid): `deb https://vitastor.io/debian bullseye main`
- Debian 10 (Buster): `deb https://vitastor.io/debian buster main`
- For Debian 10 (Buster) also enable backports repository:
`deb http://deb.debian.org/debian buster-backports main`
- Install packages: `apt update; apt install vitastor lp-solve etcd linux-image-amd64 qemu`
### CentOS
- Add Vitastor package repository:
- CentOS 7: `yum install https://vitastor.io/rpms/centos/7/vitastor-release-1.0-1.el7.noarch.rpm`
- CentOS 8: `dnf install https://vitastor.io/rpms/centos/8/vitastor-release-1.0-1.el8.noarch.rpm`
- Enable EPEL: `yum/dnf install epel-release`
- Enable additional CentOS repositories:
- CentOS 7: `yum install centos-release-scl`
- CentOS 8: `dnf install centos-release-advanced-virtualization`
- Enable elrepo-kernel:
- CentOS 7: `yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm`
- CentOS 8: `dnf install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm`
- Install packages: `yum/dnf install vitastor lpsolve etcd kernel-ml qemu-kvm`
### Building from Source
- Install Linux kernel 5.4 or newer, for io_uring support. 5.8 or later is highly recommended because
there is at least one known io_uring hang with 5.4 and an HP SmartArray controller.
- Install liburing 0.4 or newer and its headers.
- Install lp_solve.
- Install etcd. Attention: you need a fixed version from here: https://github.com/vitalif/etcd/,
branch release-3.4, because there is a bug in upstream etcd which makes Vitastor OSDs fail to
move PGs out of "starting" state if you have at least around ~500 PGs or so. The custom build
will be unnecessary when etcd merges the fix: https://github.com/etcd-io/etcd/pull/12402.
- Install node.js 10 or newer.
- Install gcc and g++ 8.x or newer.
- Clone https://yourcmc.ru/git/vitalif/vitastor/ with submodules.
- Install QEMU 3.0+, get its source, begin to build it, stop the build and copy headers:
- `<qemu>/include` &rarr; `<vitastor>/qemu/include`
- Debian:
* Use qemu packages from the main repository
* `<qemu>/b/qemu/config-host.h` &rarr; `<vitastor>/qemu/b/qemu/config-host.h`
* `<qemu>/b/qemu/qapi` &rarr; `<vitastor>/qemu/b/qemu/qapi`
- CentOS 8:
* Use qemu packages from the Advanced-Virtualization repository. To enable it, run
`yum install centos-release-advanced-virtualization.noarch` and then `yum install qemu`
* `<qemu>/config-host.h` &rarr; `<vitastor>/qemu/b/qemu/config-host.h`
* For QEMU 3.0+: `<qemu>/qapi` &rarr; `<vitastor>/qemu/b/qemu/qapi`
* For QEMU 2.0+: `<qemu>/qapi-types.h` &rarr; `<vitastor>/qemu/b/qemu/qapi-types.h`
- `config-host.h` and `qapi` are required because they contain generated headers
- You can also rebuild QEMU with a patch that makes LD_PRELOAD unnecessary to load vitastor driver.
See `qemu-*.*-vitastor.patch`.
- Install fio 3.7 or later, get its source and symlink it into `<vitastor>/fio`.
- Build & install Vitastor with `mkdir build && cd build && cmake .. && make -j8 && make install`.
Pay attention to the `QEMU_PLUGINDIR` cmake option - it must be set to `qemu-kvm` on RHEL.
## Running
Please note that startup procedure isn't currently simple - you specify configuration
and calculate disk offsets almost by hand. This will be fixed in near future.
- Get some SATA or NVMe SSDs with capacitors (server-grade drives). You can use desktop SSDs
with lazy fsync, but prepare for inferior single-thread latency.
- Get a fast network (at least 10 Gbit/s).
- Disable CPU powersaving: `cpupower idle-set -D 0 && cpupower frequency-set -g performance`.
- Check `/usr/lib/vitastor/mon/make-units.sh` and `/usr/lib/vitastor/mon/make-osd.sh` and
put desired values into the variables at the top of these files.
- Create systemd units for the monitor and etcd: `/usr/lib/vitastor/mon/make-units.sh`
- Create systemd units for your OSDs: `/usr/lib/vitastor/mon/make-osd.sh /dev/disk/by-partuuid/XXX [/dev/disk/by-partuuid/YYY ...]`
- You can edit the units and change OSD configuration. Notable configuration variables:
- `disable_data_fsync 1` - only safe with server-grade drives with capacitors.
- `immediate_commit all` - use this if all your drives are server-grade.
- `disable_device_lock 1` - only required if you run multiple OSDs on one block device.
- `flusher_count 256` - flusher is a micro-thread that removes old data from the journal.
You don't have to worry about this parameter anymore, 256 is enough.
- `disk_alignment`, `journal_block_size`, `meta_block_size` should be set to the internal
block size of your SSDs which is 4096 on most drives.
- `journal_no_same_sector_overwrites true` prevents multiple overwrites of the same journal sector.
Most (99%) SSDs don't need this option. But Intel D3-4510 does because it doesn't like when you
overwrite the same sector twice in a short period of time. The setting forces Vitastor to never
overwrite the same journal sector twice in a row which makes D3-4510 almost happy. Not totally
happy, because overwrites of the same block can still happen in the metadata area... When this
setting is set, it is also required to raise `journal_sector_buffer_count` setting, which is the
number of dirty journal sectors that may be written to at the same time.
- `systemctl start vitastor.target` everywhere.
- Create global configuration in etcd: `etcdctl --endpoints=... put /vitastor/config/global '{"immediate_commit":"all"}'`
(if all your drives have capacitors).
- Create pool configuration in etcd: `etcdctl --endpoints=... put /vitastor/config/pools '{"1":{"name":"testpool","scheme":"replicated","pg_size":2,"pg_minsize":1,"pg_count":256,"failure_domain":"host"}}'`.
For jerasure pools the configuration should look like the following: `2:{"name":"ecpool","scheme":"jerasure","pg_size":4,"parity_chunks":2,"pg_minsize":2,"pg_count":256,"failure_domain":"host"}`.
- At this point, one of the monitors will configure PGs and OSDs will start them.
- You can check PG states with `etcdctl --endpoints=... get --prefix /vitastor/pg/state`. All PGs should become 'active'.
- Run tests with (for example): `fio -thread -ioengine=libfio_vitastor.so -name=test -bs=4M -direct=1 -iodepth=16 -rw=write -etcd=10.115.0.10:2379/v3 -pool=1 -inode=1 -size=400G`.
- Upload VM disk image with qemu-img (for example):
```
qemu-img convert -f qcow2 debian10.qcow2 -p -O raw 'vitastor:etcd_host=10.115.0.10\:2379/v3:pool=1:inode=1:size=2147483648'
```
Note that the command requires to be run with `LD_PRELOAD=/usr/lib/x86_64-linux-gnu/qemu/block-vitastor.so qemu-img ...`
if you use unmodified QEMU.
- Run QEMU with (for example):
```
qemu-system-x86_64 -enable-kvm -m 1024
-drive 'file=vitastor:etcd_host=10.115.0.10\:2379/v3:pool=1:inode=1:size=2147483648',format=raw,if=none,id=drive-virtio-disk0,cache=none
-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1,write-cache=off,physical_block_size=4096,logical_block_size=512
-vnc 0.0.0.0:0
```
- Remove inode with (for example):
```
vitastor-rm --etcd_address 10.115.0.10:2379/v3 --pool 1 --inode 1 --parallel_osds 16 --iodepth 32
```
## Known Problems
- Object deletion requests may currently lead to 'incomplete' objects in EC pools
if your OSDs crash during deletion because proper handling of object cleanup
in a cluster should be "three-phase" and it's currently not implemented.
Just repeat the removal request again in this case.
## Implementation Principles
- I like architecturally simple solutions. Vitastor is and will always be designed
exactly like that.
- I also like reinventing the wheel to some extent, like writing my own HTTP client
for etcd interaction instead of using prebuilt libraries, because in this case
I'm confident about what my code does and what it doesn't do.
- I don't care about C++ "best practices" like RAII or proper inheritance or usage of
smart pointers or whatever and I don't intend to change my mind, so if you're here
looking for ideal reference C++ code, this probably isn't the right place.
- I like node.js better than any other dynamically-typed language interpreter
because it's faster than any other interpreter in the world, has neutral C-like
syntax and built-in event loop. That's why Monitor is implemented in node.js.
## Author and License
Copyright (c) Vitaliy Filippov (vitalif [at] yourcmc.ru), 2019+
Join Vitastor Telegram Chat: https://t.me/vitastor
All server-side code (OSD, Monitor and so on) is licensed under the terms of
Vitastor Network Public License 1.1 (VNPL 1.1), a copyleft license based on
GNU GPLv3.0 with the additional "Network Interaction" clause which requires
opensourcing all programs directly or indirectly interacting with Vitastor
through a computer network and expressly designed to be used in conjunction
with it ("Proxy Programs"). Proxy Programs may be made public not only under
the terms of the same license, but also under the terms of any GPL-Compatible
Free Software License, as listed by the Free Software Foundation.
This is a stricter copyleft license than the Affero GPL.
Please note that VNPL doesn't require you to open the code of proprietary
software running inside a VM if it's not specially designed to be used with
Vitastor.
Basically, you can't use the software in a proprietary environment to provide
its functionality to users without opensourcing all intermediary components
standing between the user and Vitastor or purchasing a commercial license
from the author 😀.
Client libraries (cluster_client and so on) are dual-licensed under the same
VNPL 1.1 and also GNU GPL 2.0 or later to allow for compatibility with GPLed
software like QEMU and fio.
You can find the full text of VNPL-1.1 in the file [VNPL-1.1.txt](VNPL-1.1.txt).
GPL 2.0 is also included in this repository as [GPL-2.0.txt](GPL-2.0.txt).

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@ -1,648 +0,0 @@
VITASTOR NETWORK PUBLIC LICENSE
Version 1.1, 6 February 2021
Copyright (C) 2021 Vitaliy Filippov <vitalif@yourcmc.ru>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The Vitastor Network Public License is a free, copyleft license for
software and other kinds of works, specifically designed to ensure
cooperation with the community in the case of network server software.
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
GNU General Public Licenses and Vitastor Network Public License are
intended to guarantee your freedom to share and change all versions
of a program--to make sure it remains free software for all its users.
When we speak of free software, we are referring to freedom, not
price. GNU General Public Licenses and Vitastor Network Public License
are designed to make sure that you have the freedom to distribute copies
of free software (and charge for them if you wish), that you receive
source code or can get it if you want it, that you can change the software
or use pieces of it in new free programs, and that you know you can do these
things.
Developers that use GNU General Public Licenses and Vitastor
Network Public License protect your rights with two steps:
(1) assert copyright on the software, and (2) offer
you this License which gives you legal permission to copy, distribute
and/or modify the software.
A secondary benefit of defending all users' freedom is that
improvements made in alternate versions of the program, if they
receive widespread use, become available for other developers to
incorporate. Many developers of free software are heartened and
encouraged by the resulting cooperation. However, in the case of
software used on network servers, this result may fail to come about.
The GNU General Public License permits making a modified version and
letting the public access it on a server without ever releasing its
source code to the public. Even the GNU Affero General Public License
permits running a modified version in a closed environment where
public users only interact with it through a closed-source proxy, again,
without making the program and the proxy available to the public
for free.
The Vitastor Network Public License is designed specifically to
ensure that, in such cases, the modified program and the proxy stays
available to the community. It requires the operator of a network server to
provide the source code of the original program and all other programs
communicating with it running there to the users of that server.
Therefore, public use of a modified version, on a server accessible
directly or indirectly to the public, gives the public access to the source
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The precise terms and conditions for copying, distribution and
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8. Termination.
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However, if you cease all violation of this License, then your
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Moreover, your license from a particular copyright holder is
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Termination of your rights under this section does not terminate the
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material under section 10.
9. Acceptance Not Required for Having Copies.
You are not required to accept this License in order to receive or
run a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance. However,
nothing other than this License grants you permission to propagate or
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10. Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically
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the predecessor has it or can get it with reasonable efforts.
You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License. For example, you may
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11. Patents.
A "contributor" is a copyright holder who authorizes use under this
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work thus licensed is called the contributor's "contributor version".
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actual knowledge that, but for the patent license, your conveying the
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in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
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A patent license is "discriminatory" if it does not include within
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or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
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License and any other pertinent obligations, then as a consequence you may
not convey it at all. For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Remote Network Interaction.
A "Proxy Program" means a separate program which is specially designed to
be used in conjunction with the covered work and interacts with it directly
or indirectly through any kind of API (application programming interfaces),
a computer network, an imitation of such network, or another Proxy Program
itself.
Notwithstanding any other provision of this License, if you provide any user
with an opportunity to interact with the covered work through a computer
network, an imitation of such network, or any number of "Proxy Programs",
you must prominently offer that user an opportunity to receive the
Corresponding Source of the covered work and all Proxy Programs from a
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the Corresponding Source for all Proxy Programs must be made available
under the conditions of either this License or any GPL-Compatible
Free Software License, as described by the Free Software Foundation
in their "GPL-Compatible License List".
14. Revised Versions of this License.
Vitastor Author may publish revised and/or new versions of
the Vitastor Network Public License from time to time. Such new versions
will be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the Vitastor Network
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version. If the Program does not specify a version
number of the Vitastor Network Public License, you may choose any version
ever published.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the Vitastor Network Public License as published by
the Vitastor Author, either version 1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Vitastor Network Public License for more details.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.

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@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include <stdexcept>
#include "allocator.h"
@ -13,19 +10,19 @@ allocator::allocator(uint64_t blocks)
{
throw std::invalid_argument("blocks");
}
uint64_t p2 = 1;
total = 0;
uint64_t p2 = 1, total = 1;
while (p2 * 64 < blocks)
{
total += p2;
p2 = p2 * 64;
total += p2;
}
total -= p2;
total += (blocks+63) / 64;
mask = new uint64_t[total];
mask = new uint64_t[2 + total];
size = free = blocks;
last_one_mask = (blocks % 64) == 0
? UINT64_MAX
: ((1l << (blocks % 64)) - 1);
: ~(UINT64_MAX << (64 - blocks % 64));
for (uint64_t i = 0; i < total; i++)
{
mask[i] = 0;
@ -99,10 +96,6 @@ uint64_t allocator::find_free()
uint64_t p2 = 1, offset = 0, addr = 0, f, i;
while (p2 < size)
{
if (offset+addr >= total)
{
return UINT64_MAX;
}
uint64_t m = mask[offset + addr];
for (i = 0, f = 1; i < 64; i++, f <<= 1)
{
@ -117,6 +110,11 @@ uint64_t allocator::find_free()
return UINT64_MAX;
}
addr = (addr * 64) | i;
if (addr >= size)
{
// No space
return UINT64_MAX;
}
offset += p2;
p2 = p2 * 64;
}
@ -127,35 +125,3 @@ uint64_t allocator::get_free_count()
{
return free;
}
void bitmap_set(void *bitmap, uint64_t start, uint64_t len, uint64_t bitmap_granularity)
{
if (start == 0)
{
if (len == 32*bitmap_granularity)
{
*((uint32_t*)bitmap) = UINT32_MAX;
return;
}
else if (len == 64*bitmap_granularity)
{
*((uint64_t*)bitmap) = UINT64_MAX;
return;
}
}
unsigned bit_start = start / bitmap_granularity;
unsigned bit_end = ((start + len) + bitmap_granularity - 1) / bitmap_granularity;
while (bit_start < bit_end)
{
if (!(bit_start & 7) && bit_end >= bit_start+8)
{
((uint8_t*)bitmap)[bit_start / 8] = UINT8_MAX;
bit_start += 8;
}
else
{
((uint8_t*)bitmap)[bit_start / 8] |= 1 << (bit_start % 8);
bit_start++;
}
}
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#include <stdint.h>
@ -8,7 +5,6 @@
// Hierarchical bitmap allocator
class allocator
{
uint64_t total;
uint64_t size;
uint64_t free;
uint64_t last_one_mask;
@ -20,5 +16,3 @@ public:
uint64_t find_free();
uint64_t get_free_count();
};
void bitmap_set(void *bitmap, uint64_t start, uint64_t len, uint64_t bitmap_granularity);

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "base64.h"
std::string base64_encode(const std::string &in)

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#include <string>

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
blockstore_t::blockstore_t(blockstore_config_t & config, ring_loop_t *ringloop)
@ -35,7 +32,12 @@ bool blockstore_t::is_safe_to_stop()
void blockstore_t::enqueue_op(blockstore_op_t *op)
{
impl->enqueue_op(op);
impl->enqueue_op(op, false);
}
void blockstore_t::enqueue_op_first(blockstore_op_t *op)
{
impl->enqueue_op(op, true);
}
std::unordered_map<object_id, uint64_t> & blockstore_t::get_unstable_writes()
@ -43,11 +45,6 @@ std::unordered_map<object_id, uint64_t> & blockstore_t::get_unstable_writes()
return impl->unstable_writes;
}
std::map<uint64_t, uint64_t> & blockstore_t::get_inode_space_stats()
{
return impl->inode_space_stats;
}
uint32_t blockstore_t::get_block_size()
{
return impl->get_block_size();
@ -63,7 +60,7 @@ uint64_t blockstore_t::get_free_block_count()
return impl->get_free_block_count();
}
uint32_t blockstore_t::get_bitmap_granularity()
uint32_t blockstore_t::get_disk_alignment()
{
return impl->get_bitmap_granularity();
return impl->get_disk_alignment();
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#ifndef _LARGEFILE64_SOURCE
@ -9,7 +6,6 @@
#include <stdint.h>
#include <string>
#include <map>
#include <unordered_map>
#include <functional>
@ -27,19 +23,17 @@
#define DEFAULT_ORDER 17
#define MIN_BLOCK_SIZE 4*1024
#define MAX_BLOCK_SIZE 128*1024*1024
#define DEFAULT_BITMAP_GRANULARITY 4096
#define BS_OP_MIN 1
#define BS_OP_READ 1
#define BS_OP_WRITE 2
#define BS_OP_WRITE_STABLE 3
#define BS_OP_SYNC 4
#define BS_OP_STABLE 5
#define BS_OP_DELETE 6
#define BS_OP_LIST 7
#define BS_OP_ROLLBACK 8
#define BS_OP_SYNC_STAB_ALL 9
#define BS_OP_MAX 9
#define BS_OP_SYNC 3
#define BS_OP_STABLE 4
#define BS_OP_DELETE 5
#define BS_OP_LIST 6
#define BS_OP_ROLLBACK 7
#define BS_OP_SYNC_STAB_ALL 8
#define BS_OP_MAX 8
#define BS_OP_PRIVATE_DATA_SIZE 256
@ -47,9 +41,9 @@
Blockstore opcode documentation:
## BS_OP_READ / BS_OP_WRITE / BS_OP_WRITE_STABLE
## BS_OP_READ / BS_OP_WRITE
Read or write object data. WRITE_STABLE writes a version that doesn't require marking as stable.
Read or write object data.
Input:
- oid = requested object
@ -65,8 +59,6 @@ Input:
- offset, len = offset and length within object. length may be zero, in that case
read operation only returns the version / write operation only bumps the version
- buf = pre-allocated buffer for data (read) / with data (write). may be NULL if len == 0.
- bitmap = pointer to the new 'external' object bitmap data. Its part which is respective to the
write request is copied into the metadata area bitwise and stored there.
Output:
- retval = number of bytes actually read/written or negative error number (-EINVAL or -ENOSPC)
@ -121,8 +113,6 @@ Input:
- oid.stripe = PG alignment
- len = PG count or 0 to list all objects
- offset = PG number
- oid.inode = min inode number or 0 to list all inodes
- version = max inode number or 0 to list all inodes
Output:
- retval = total obj_ver_id count
@ -144,7 +134,6 @@ struct blockstore_op_t
uint32_t offset;
uint32_t len;
void *buf;
void *bitmap;
int retval;
uint8_t private_data[BS_OP_PRIVATE_DATA_SIZE];
@ -179,16 +168,17 @@ public:
// Submission
void enqueue_op(blockstore_op_t *op);
// Insert operation into the beginning of the queue
// Intended for the OSD syncer "thread" to be able to stabilize something when the journal is full
void enqueue_op_first(blockstore_op_t *op);
// Unstable writes are added here (map of object_id -> version)
std::unordered_map<object_id, uint64_t> & get_unstable_writes();
// Get per-inode space usage statistics
std::map<uint64_t, uint64_t> & get_inode_space_stats();
// FIXME rename to object_size
uint32_t get_block_size();
uint64_t get_block_count();
uint64_t get_free_block_count();
uint32_t get_bitmap_granularity();
uint32_t get_disk_alignment();
};

View File

@ -1,24 +1,16 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
journal_flusher_t::journal_flusher_t(int flusher_count, blockstore_impl_t *bs)
{
this->bs = bs;
this->flusher_count = flusher_count;
this->cur_flusher_count = 1;
this->target_flusher_count = 1;
dequeuing = false;
trimming = false;
active_flushers = 0;
syncing_flushers = 0;
// FIXME: allow to configure flusher_start_threshold and journal_trim_interval
flusher_start_threshold = bs->journal_block_size / sizeof(journal_entry_stable);
journal_trim_interval = 512;
sync_threshold = bs->journal_block_size / sizeof(journal_entry_stable);
journal_trim_interval = sync_threshold;
journal_trim_counter = 0;
trim_wanted = 0;
journal_superblock = bs->journal.inmemory ? bs->journal.buffer : memalign_or_die(MEM_ALIGNMENT, bs->journal_block_size);
journal_superblock = bs->journal.inmemory ? bs->journal.buffer : memalign(MEM_ALIGNMENT, bs->journal_block_size);
co = new journal_flusher_co[flusher_count];
for (int i = 0; i < flusher_count; i++)
{
@ -70,31 +62,14 @@ bool journal_flusher_t::is_active()
void journal_flusher_t::loop()
{
target_flusher_count = bs->write_iodepth*2;
if (target_flusher_count <= 0)
target_flusher_count = 1;
else if (target_flusher_count > flusher_count)
target_flusher_count = flusher_count;
if (target_flusher_count > cur_flusher_count)
cur_flusher_count = target_flusher_count;
else if (target_flusher_count < cur_flusher_count)
for (int i = 0; (active_flushers > 0 || dequeuing) && i < flusher_count; i++)
{
while (target_flusher_count < cur_flusher_count)
{
if (co[cur_flusher_count-1].wait_state)
break;
cur_flusher_count--;
}
}
for (int i = 0; (active_flushers > 0 || dequeuing) && i < cur_flusher_count; i++)
co[i].loop();
}
}
void journal_flusher_t::enqueue_flush(obj_ver_id ov)
{
#ifdef BLOCKSTORE_DEBUG
printf("enqueue_flush %lx:%lx v%lu\n", ov.oid.inode, ov.oid.stripe, ov.version);
#endif
auto it = flush_versions.find(ov.oid);
if (it != flush_versions.end())
{
@ -106,18 +81,15 @@ void journal_flusher_t::enqueue_flush(obj_ver_id ov)
flush_versions[ov.oid] = ov.version;
flush_queue.push_back(ov.oid);
}
if (!dequeuing && (flush_queue.size() >= flusher_start_threshold || trim_wanted > 0))
if (!dequeuing && flush_queue.size() >= sync_threshold)
{
dequeuing = true;
bs->ringloop->wakeup();
}
}
void journal_flusher_t::unshift_flush(obj_ver_id ov, bool force)
void journal_flusher_t::unshift_flush(obj_ver_id ov)
{
#ifdef BLOCKSTORE_DEBUG
printf("unshift_flush %lx:%lx v%lu\n", ov.oid.inode, ov.oid.stripe, ov.version);
#endif
auto it = flush_versions.find(ov.oid);
if (it != flush_versions.end())
{
@ -127,62 +99,28 @@ void journal_flusher_t::unshift_flush(obj_ver_id ov, bool force)
else
{
flush_versions[ov.oid] = ov.version;
if (!force)
flush_queue.push_front(ov.oid);
}
if (force)
flush_queue.push_front(ov.oid);
if (force || !dequeuing && (flush_queue.size() >= flusher_start_threshold || trim_wanted > 0))
if (!dequeuing && flush_queue.size() >= sync_threshold)
{
dequeuing = true;
bs->ringloop->wakeup();
}
}
void journal_flusher_t::remove_flush(object_id oid)
{
#ifdef BLOCKSTORE_DEBUG
printf("undo_flush %lx:%lx\n", oid.inode, oid.stripe);
#endif
auto v_it = flush_versions.find(oid);
if (v_it != flush_versions.end())
{
flush_versions.erase(v_it);
for (auto q_it = flush_queue.begin(); q_it != flush_queue.end(); q_it++)
{
if (*q_it == oid)
{
flush_queue.erase(q_it);
break;
}
}
}
}
void journal_flusher_t::request_trim()
void journal_flusher_t::force_start()
{
dequeuing = true;
trim_wanted++;
bs->ringloop->wakeup();
}
void journal_flusher_t::mark_trim_possible()
{
if (trim_wanted > 0)
{
dequeuing = true;
journal_trim_counter++;
bs->ringloop->wakeup();
}
}
void journal_flusher_t::release_trim()
{
trim_wanted--;
}
#define await_sqe(label) \
resume_##label:\
{\
timespec now;\
clock_gettime(CLOCK_REALTIME, &now);\
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);\
}\
sqe = bs->get_sqe();\
if (!sqe)\
{\
@ -230,22 +168,9 @@ bool journal_flusher_co::loop()
goto resume_17;
else if (wait_state == 18)
goto resume_18;
else if (wait_state == 19)
goto resume_19;
else if (wait_state == 20)
goto resume_20;
else if (wait_state == 21)
goto resume_21;
resume_0:
if (!flusher->flush_queue.size() || !flusher->dequeuing)
{
stop_flusher:
if (flusher->trim_wanted > 0 && flusher->journal_trim_counter > 0)
{
// Attempt forced trim
flusher->active_flushers++;
goto trim_journal;
}
flusher->dequeuing = false;
wait_state = 0;
return true;
@ -257,11 +182,21 @@ stop_flusher:
dirty_end = bs->dirty_db.find(cur);
if (dirty_end != bs->dirty_db.end())
{
if (dirty_end->second.journal_sector >= bs->journal.dirty_start &&
(bs->journal.dirty_start >= bs->journal.used_start ||
dirty_end->second.journal_sector < bs->journal.used_start))
{
// We can't flush journal sectors that are still written to
flusher->enqueue_flush(cur);
flusher->dequeuing = false;
wait_state = 0;
return true;
}
repeat_it = flusher->sync_to_repeat.find(cur.oid);
if (repeat_it != flusher->sync_to_repeat.end())
{
#ifdef BLOCKSTORE_DEBUG
printf("Postpone %lx:%lx v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
printf("Postpone %lu:%lu v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
#endif
// We don't flush different parts of history of the same object in parallel
// So we check if someone is already flushing this object
@ -274,110 +209,42 @@ stop_flusher:
}
else
flusher->sync_to_repeat[cur.oid] = 0;
if (dirty_end->second.journal_sector >= bs->journal.dirty_start &&
(bs->journal.dirty_start >= bs->journal.used_start ||
dirty_end->second.journal_sector < bs->journal.used_start))
{
flusher->enqueue_flush(cur);
// We can't flush journal sectors that are still written to
// However, as we group flushes by oid, current oid may have older writes to flush!
// And it may even block writes if we don't flush the older version
// (if it's in the beginning of the journal)...
// So first try to find an older version of the same object to flush.
bool found = false;
while (dirty_end != bs->dirty_db.begin())
{
dirty_end--;
if (dirty_end->first.oid != cur.oid)
{
break;
}
if (!(dirty_end->second.journal_sector >= bs->journal.dirty_start &&
(bs->journal.dirty_start >= bs->journal.used_start ||
dirty_end->second.journal_sector < bs->journal.used_start)))
{
found = true;
cur.version = dirty_end->first.version;
break;
}
}
if (!found)
{
// Try other objects
flusher->sync_to_repeat.erase(cur.oid);
int search_left = flusher->flush_queue.size() - 1;
#ifdef BLOCKSTORE_DEBUG
printf("Flusher overran writers (dirty_start=%08lx) - searching for older flushes (%d left)\n", bs->journal.dirty_start, search_left);
#endif
while (search_left > 0)
{
cur.oid = flusher->flush_queue.front();
cur.version = flusher->flush_versions[cur.oid];
flusher->flush_queue.pop_front();
flusher->flush_versions.erase(cur.oid);
dirty_end = bs->dirty_db.find(cur);
if (dirty_end != bs->dirty_db.end())
{
if (dirty_end->second.journal_sector >= bs->journal.dirty_start &&
(bs->journal.dirty_start >= bs->journal.used_start ||
dirty_end->second.journal_sector < bs->journal.used_start))
{
#ifdef BLOCKSTORE_DEBUG
printf("Write %lx:%lx v%lu is too new: offset=%08lx\n", cur.oid.inode, cur.oid.stripe, cur.version, dirty_end->second.journal_sector);
#endif
flusher->enqueue_flush(cur);
}
else
{
repeat_it = flusher->sync_to_repeat.find(cur.oid);
if (repeat_it == flusher->sync_to_repeat.end())
{
flusher->sync_to_repeat[cur.oid] = 0;
break;
}
}
}
search_left--;
}
if (search_left <= 0)
{
#ifdef BLOCKSTORE_DEBUG
printf("No older flushes, stopping\n");
#endif
goto stop_flusher;
}
}
}
#ifdef BLOCKSTORE_DEBUG
printf("Flushing %lx:%lx v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
printf("Flushing %lu:%lu v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
#endif
flusher->active_flushers++;
resume_1:
// Find it in clean_db
clean_it = bs->clean_db.find(cur.oid);
old_clean_loc = (clean_it != bs->clean_db.end() ? clean_it->second.location : UINT64_MAX);
// Scan dirty versions of the object
if (!scan_dirty(1))
{
wait_state += 1;
return false;
}
// Writes and deletes shouldn't happen at the same time
assert(!has_writes || !has_delete);
if (!has_writes && !has_delete || has_delete && old_clean_loc == UINT64_MAX)
if (copy_count == 0 && clean_loc == UINT64_MAX && !has_delete && !has_empty)
{
// Nothing to flush
bs->erase_dirty(dirty_start, std::next(dirty_end), clean_loc);
goto release_oid;
flusher->active_flushers--;
repeat_it = flusher->sync_to_repeat.find(cur.oid);
if (repeat_it != flusher->sync_to_repeat.end() && repeat_it->second > cur.version)
{
// Requeue version
flusher->unshift_flush({ .oid = cur.oid, .version = repeat_it->second });
}
flusher->sync_to_repeat.erase(repeat_it);
wait_state = 0;
goto resume_0;
}
// Find it in clean_db
clean_it = bs->clean_db.find(cur.oid);
old_clean_loc = (clean_it != bs->clean_db.end() ? clean_it->second.location : UINT64_MAX);
if (clean_loc == UINT64_MAX)
{
if (old_clean_loc == UINT64_MAX)
if (copy_count > 0 && has_delete || old_clean_loc == UINT64_MAX)
{
// Object not allocated. This is a bug.
char err[1024];
snprintf(
err, 1024, "BUG: Object %lx:%lx v%lu that we are trying to flush is not allocated on the data device",
err, 1024, "BUG: Object %lu:%lu v%lu that we are trying to flush is not allocated on the data device",
cur.oid.inode, cur.oid.stripe, cur.version
);
throw std::runtime_error(err);
@ -426,18 +293,18 @@ resume_1:
{
new_clean_bitmap = (bs->inmemory_meta
? meta_new.buf + meta_new.pos*bs->clean_entry_size + sizeof(clean_disk_entry)
: bs->clean_bitmap + (clean_loc >> bs->block_order)*(2*bs->clean_entry_bitmap_size));
: bs->clean_bitmap + (clean_loc >> bs->block_order)*bs->clean_entry_bitmap_size);
if (clean_init_bitmap)
{
memset(new_clean_bitmap, 0, bs->clean_entry_bitmap_size);
bitmap_set(new_clean_bitmap, clean_bitmap_offset, clean_bitmap_len, bs->bitmap_granularity);
bitmap_set(new_clean_bitmap, clean_bitmap_offset, clean_bitmap_len);
}
}
for (it = v.begin(); it != v.end(); it++)
{
if (new_clean_bitmap)
{
bitmap_set(new_clean_bitmap, it->offset, it->len, bs->bitmap_granularity);
bitmap_set(new_clean_bitmap, it->offset, it->len);
}
await_sqe(4);
data->iov = (struct iovec){ it->buf, (size_t)it->len };
@ -471,7 +338,6 @@ resume_1:
wait_state = 5;
return false;
}
// zero out old metadata entry
memset(meta_old.buf + meta_old.pos*bs->clean_entry_size, 0, bs->clean_entry_size);
await_sqe(15);
data->iov = (struct iovec){ meta_old.buf, bs->meta_block_size };
@ -483,30 +349,18 @@ resume_1:
}
if (has_delete)
{
// zero out new metadata entry
memset(meta_new.buf + meta_new.pos*bs->clean_entry_size, 0, bs->clean_entry_size);
}
else
{
clean_disk_entry *new_entry = (clean_disk_entry*)(meta_new.buf + meta_new.pos*bs->clean_entry_size);
if (new_entry->oid.inode != 0 && new_entry->oid != cur.oid)
{
printf("Fatal error (metadata corruption or bug): tried to overwrite non-zero metadata entry %lu (%lx:%lx) with %lx:%lx\n",
clean_loc >> bs->block_order, new_entry->oid.inode, new_entry->oid.stripe, cur.oid.inode, cur.oid.stripe);
exit(1);
}
assert(new_entry->oid.inode == 0 || new_entry->oid == cur.oid);
new_entry->oid = cur.oid;
new_entry->version = cur.version;
if (!bs->inmemory_meta)
{
memcpy(&new_entry->bitmap, new_clean_bitmap, bs->clean_entry_bitmap_size);
}
// copy latest external bitmap/attributes
if (bs->clean_entry_bitmap_size)
{
void *bmp_ptr = bs->clean_entry_bitmap_size > sizeof(void*) ? dirty_end->second.bitmap : &dirty_end->second.bitmap;
memcpy((void*)(new_entry+1) + bs->clean_entry_bitmap_size, bmp_ptr, bs->clean_entry_bitmap_size);
}
}
await_sqe(6);
data->iov = (struct iovec){ meta_new.buf, bs->meta_block_size };
@ -556,35 +410,13 @@ resume_1:
}
// Update clean_db and dirty_db, free old data locations
update_clean_db();
#ifdef BLOCKSTORE_DEBUG
printf("Flushed %lx:%lx v%lu (%d copies, wr:%d, del:%d), %ld left\n", cur.oid.inode, cur.oid.stripe, cur.version,
copy_count, has_writes, has_delete, flusher->flush_queue.size());
#endif
release_oid:
repeat_it = flusher->sync_to_repeat.find(cur.oid);
if (repeat_it != flusher->sync_to_repeat.end() && repeat_it->second > cur.version)
{
// Requeue version
flusher->unshift_flush({ .oid = cur.oid, .version = repeat_it->second }, false);
}
flusher->sync_to_repeat.erase(repeat_it);
trim_journal:
// Clear unused part of the journal every <journal_trim_interval> flushes
if (!((++flusher->journal_trim_counter) % flusher->journal_trim_interval) || flusher->trim_wanted > 0)
if (!((++flusher->journal_trim_counter) % flusher->journal_trim_interval))
{
flusher->journal_trim_counter = 0;
new_trim_pos = bs->journal.get_trim_pos();
if (new_trim_pos != bs->journal.used_start)
if (bs->journal.trim())
{
resume_19:
// Wait for other coroutines trimming the journal, if any
if (flusher->trimming)
{
wait_state = 19;
return false;
}
flusher->trimming = true;
// First update journal "superblock" and only then update <used_start> in memory
// Update journal "superblock"
await_sqe(12);
*((journal_entry_start*)flusher->journal_superblock) = {
.crc32 = 0,
@ -592,7 +424,7 @@ resume_1:
.type = JE_START,
.size = sizeof(journal_entry_start),
.reserved = 0,
.journal_start = new_trim_pos,
.journal_start = bs->journal.used_start,
};
((journal_entry_start*)flusher->journal_superblock)->crc32 = je_crc32((journal_entry*)flusher->journal_superblock);
data->iov = (struct iovec){ flusher->journal_superblock, bs->journal_block_size };
@ -605,28 +437,20 @@ resume_1:
wait_state = 13;
return false;
}
if (!bs->disable_journal_fsync)
{
await_sqe(20);
my_uring_prep_fsync(sqe, bs->journal.fd, IORING_FSYNC_DATASYNC);
data->iov = { 0 };
data->callback = simple_callback_w;
resume_21:
if (wait_count > 0)
{
wait_state = 21;
return false;
}
}
bs->journal.used_start = new_trim_pos;
#ifdef BLOCKSTORE_DEBUG
printf("Journal trimmed to %08lx (next_free=%08lx)\n", bs->journal.used_start, bs->journal.next_free);
#endif
flusher->trimming = false;
}
}
// All done
#ifdef BLOCKSTORE_DEBUG
printf("Flushed %lu:%lu v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
#endif
flusher->active_flushers--;
repeat_it = flusher->sync_to_repeat.find(cur.oid);
if (repeat_it != flusher->sync_to_repeat.end() && repeat_it->second > cur.version)
{
// Requeue version
flusher->unshift_flush({ .oid = cur.oid, .version = repeat_it->second });
}
flusher->sync_to_repeat.erase(repeat_it);
wait_state = 0;
goto resume_0;
}
@ -645,25 +469,19 @@ bool journal_flusher_co::scan_dirty(int wait_base)
copy_count = 0;
clean_loc = UINT64_MAX;
has_delete = false;
has_writes = false;
has_empty = false;
skip_copy = false;
clean_init_bitmap = false;
while (1)
{
if (!IS_STABLE(dirty_it->second.state))
{
char err[1024];
snprintf(
err, 1024, "BUG: Unexpected dirty_entry %lx:%lx v%lu unstable state during flush: %d",
dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version, dirty_it->second.state
);
throw std::runtime_error(err);
}
else if (IS_JOURNAL(dirty_it->second.state) && !skip_copy)
if (dirty_it->second.state == ST_J_STABLE && !skip_copy)
{
// First we submit all reads
has_writes = true;
if (dirty_it->second.len != 0)
if (dirty_it->second.len == 0)
{
has_empty = true;
}
else
{
offset = dirty_it->second.offset;
end_offset = dirty_it->second.offset + dirty_it->second.len;
@ -677,18 +495,18 @@ bool journal_flusher_co::scan_dirty(int wait_base)
{
submit_offset = dirty_it->second.location + offset - dirty_it->second.offset;
submit_len = it == v.end() || it->offset >= end_offset ? end_offset-offset : it->offset-offset;
it = v.insert(it, (copy_buffer_t){ .offset = offset, .len = submit_len, .buf = memalign_or_die(MEM_ALIGNMENT, submit_len) });
it = v.insert(it, (copy_buffer_t){ .offset = offset, .len = submit_len, .buf = memalign(MEM_ALIGNMENT, submit_len) });
copy_count++;
if (bs->journal.inmemory)
{
// Take it from memory
memcpy(it->buf, bs->journal.buffer + submit_offset, submit_len);
memcpy(v.back().buf, bs->journal.buffer + submit_offset, submit_len);
}
else
{
// Read it from disk
await_sqe(0);
data->iov = (struct iovec){ it->buf, (size_t)submit_len };
data->iov = (struct iovec){ v.back().buf, (size_t)submit_len };
data->callback = simple_callback_r;
my_uring_prep_readv(
sqe, bs->journal.fd, &data->iov, 1, bs->journal.offset + submit_offset
@ -702,22 +520,30 @@ bool journal_flusher_co::scan_dirty(int wait_base)
}
}
}
else if (IS_BIG_WRITE(dirty_it->second.state) && !skip_copy)
else if (dirty_it->second.state == ST_D_STABLE && !skip_copy)
{
// There is an unflushed big write. Copy small writes in its position
has_writes = true;
clean_loc = dirty_it->second.location;
clean_init_bitmap = true;
clean_bitmap_offset = dirty_it->second.offset;
clean_bitmap_len = dirty_it->second.len;
skip_copy = true;
}
else if (IS_DELETE(dirty_it->second.state) && !skip_copy)
else if (dirty_it->second.state == ST_DEL_STABLE && !skip_copy)
{
// There is an unflushed delete
has_delete = true;
skip_copy = true;
}
else if (!IS_STABLE(dirty_it->second.state))
{
char err[1024];
snprintf(
err, 1024, "BUG: Unexpected dirty_entry %lu:%lu v%lu state during flush: %d",
dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version, dirty_it->second.state
);
throw std::runtime_error(err);
}
dirty_start = dirty_it;
if (dirty_it == bs->dirty_db.begin())
{
@ -753,7 +579,7 @@ bool journal_flusher_co::modify_meta_read(uint64_t meta_loc, flusher_meta_write_
if (wr.it == flusher->meta_sectors.end())
{
// Not in memory yet, read it
wr.buf = memalign_or_die(MEM_ALIGNMENT, bs->meta_block_size);
wr.buf = memalign(MEM_ALIGNMENT, bs->meta_block_size);
wr.it = flusher->meta_sectors.emplace(wr.sector, (meta_sector_t){
.offset = wr.sector,
.len = bs->meta_block_size,
@ -783,7 +609,7 @@ void journal_flusher_co::update_clean_db()
if (old_clean_loc != UINT64_MAX && old_clean_loc != clean_loc)
{
#ifdef BLOCKSTORE_DEBUG
printf("Free block %lu (new location is %lu)\n", old_clean_loc >> bs->block_order, clean_loc >> bs->block_order);
printf("Free block %lu\n", old_clean_loc >> bs->block_order);
#endif
bs->data_alloc->set(old_clean_loc >> bs->block_order, false);
}
@ -831,10 +657,7 @@ bool journal_flusher_co::fsync_batch(bool fsync_meta, int wait_base)
sync_found:
cur_sync->ready_count++;
flusher->syncing_flushers++;
resume_1:
if (!cur_sync->state)
{
if (flusher->syncing_flushers >= flusher->cur_flusher_count || !flusher->flush_queue.size())
if (flusher->syncing_flushers >= flusher->flusher_count || !flusher->flush_queue.size())
{
// Sync batch is ready. Do it.
await_sqe(0);
@ -843,23 +666,23 @@ bool journal_flusher_co::fsync_batch(bool fsync_meta, int wait_base)
my_uring_prep_fsync(sqe, fsync_meta ? bs->meta_fd : bs->data_fd, IORING_FSYNC_DATASYNC);
cur_sync->state = 1;
wait_count++;
resume_2:
resume_1:
if (wait_count > 0)
{
wait_state = 2;
wait_state = 1;
return false;
}
// Sync completed. All previous coroutines waiting for it must be resumed
cur_sync->state = 2;
bs->ringloop->wakeup();
}
else
{
// Wait until someone else sends and completes a sync.
wait_state = 1;
resume_2:
if (!cur_sync->state)
{
wait_state = 2;
return false;
}
}
flusher->syncing_flushers--;
cur_sync->ready_count--;
if (cur_sync->ready_count == 0)
@ -869,3 +692,35 @@ bool journal_flusher_co::fsync_batch(bool fsync_meta, int wait_base)
}
return true;
}
void journal_flusher_co::bitmap_set(void *bitmap, uint64_t start, uint64_t len)
{
if (start == 0)
{
if (len == 32*bs->bitmap_granularity)
{
*((uint32_t*)bitmap) = UINT32_MAX;
return;
}
else if (len == 64*bs->bitmap_granularity)
{
*((uint64_t*)bitmap) = UINT64_MAX;
return;
}
}
unsigned bit_start = start / bs->bitmap_granularity;
unsigned bit_end = ((start + len) + bs->bitmap_granularity - 1) / bs->bitmap_granularity;
while (bit_start < bit_end)
{
if (!(bit_start & 7) && bit_end >= bit_start+8)
{
((uint8_t*)bitmap)[bit_start / 8] = UINT8_MAX;
bit_start += 8;
}
else
{
((uint8_t*)bitmap)[bit_start / 8] |= 1 << (bit_start % 8);
bit_start++;
}
}
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
struct copy_buffer_t
{
uint64_t offset, len;
@ -48,7 +45,7 @@ class journal_flusher_co
std::map<object_id, uint64_t>::iterator repeat_it;
std::function<void(ring_data_t*)> simple_callback_r, simple_callback_w;
bool skip_copy, has_delete, has_writes;
bool skip_copy, has_delete, has_empty;
blockstore_clean_db_t::iterator clean_it;
std::vector<copy_buffer_t> v;
std::vector<copy_buffer_t>::iterator it;
@ -59,8 +56,6 @@ class journal_flusher_co
uint64_t clean_bitmap_offset, clean_bitmap_len;
void *new_clean_bitmap;
uint64_t new_trim_pos;
// local: scan_dirty()
uint64_t offset, end_offset, submit_offset, submit_len;
@ -69,6 +64,7 @@ class journal_flusher_co
bool modify_meta_read(uint64_t meta_loc, flusher_meta_write_t &wr, int wait_base);
void update_clean_db();
bool fsync_batch(bool fsync_meta, int wait_base);
void bitmap_set(void *bitmap, uint64_t start, uint64_t len);
public:
journal_flusher_co();
bool loop();
@ -77,16 +73,14 @@ public:
// Journal flusher itself
class journal_flusher_t
{
int trim_wanted = 0;
bool dequeuing;
int flusher_count, cur_flusher_count, target_flusher_count;
int flusher_start_threshold;
int flusher_count;
int sync_threshold;
journal_flusher_co *co;
blockstore_impl_t *bs;
friend class journal_flusher_co;
int journal_trim_counter, journal_trim_interval;
bool trimming;
void* journal_superblock;
int active_flushers;
@ -102,10 +96,7 @@ public:
~journal_flusher_t();
void loop();
bool is_active();
void mark_trim_possible();
void request_trim();
void release_trim();
void force_start();
void enqueue_flush(obj_ver_id oid);
void unshift_flush(obj_ver_id oid, bool force);
void remove_flush(object_id oid);
void unshift_flush(obj_ver_id oid);
};

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
blockstore_impl_t::blockstore_impl_t(blockstore_config_t & config, ring_loop_t *ringloop)
@ -10,9 +7,9 @@ blockstore_impl_t::blockstore_impl_t(blockstore_config_t & config, ring_loop_t *
ring_consumer.loop = [this]() { loop(); };
ringloop->register_consumer(&ring_consumer);
initialized = 0;
zero_object = (uint8_t*)memalign(MEM_ALIGNMENT, block_size);
data_fd = meta_fd = journal.fd = -1;
parse_config(config);
zero_object = (uint8_t*)memalign_or_die(MEM_ALIGNMENT, block_size);
try
{
open_data();
@ -101,27 +98,45 @@ void blockstore_impl_t::loop()
{
// try to submit ops
unsigned initial_ring_space = ringloop->space_left();
// has_writes == 0 - no writes before the current queue item
// has_writes == 1 - some writes in progress
// has_writes == 2 - tried to submit some writes, but failed
int has_writes = 0, op_idx = 0, new_idx = 0;
for (; op_idx < submit_queue.size(); op_idx++, new_idx++)
// FIXME: rework this "sync polling"
auto cur_sync = in_progress_syncs.begin();
while (cur_sync != in_progress_syncs.end())
{
auto op = submit_queue[op_idx];
submit_queue[new_idx] = op;
if (continue_sync(*cur_sync) != 2)
{
// List is unmodified
cur_sync++;
}
else
{
cur_sync = in_progress_syncs.begin();
}
}
auto cur = submit_queue.begin();
int has_writes = 0;
while (cur != submit_queue.end())
{
auto op_ptr = cur;
auto op = *(cur++);
// FIXME: This needs some simplification
// Writes should not block reads if the ring is not full and reads don't depend on them
// In all other cases we should stop submission
if (PRIV(op)->wait_for)
{
check_wait(op);
#ifdef BLOCKSTORE_DEBUG
if (PRIV(op)->wait_for)
{
printf("still waiting for %d\n", PRIV(op)->wait_for);
}
#endif
if (PRIV(op)->wait_for == WAIT_SQE)
{
break;
}
else if (PRIV(op)->wait_for)
{
if (op->opcode == BS_OP_WRITE || op->opcode == BS_OP_WRITE_STABLE || op->opcode == BS_OP_DELETE)
if (op->opcode == BS_OP_WRITE || op->opcode == BS_OP_DELETE)
{
has_writes = 2;
}
@ -130,33 +145,20 @@ void blockstore_impl_t::loop()
}
unsigned ring_space = ringloop->space_left();
unsigned prev_sqe_pos = ringloop->save();
// 0 = can't submit
// 1 = in progress
// 2 = can be removed from queue
int wr_st = 0;
bool dequeue_op = false;
if (op->opcode == BS_OP_READ)
{
wr_st = dequeue_read(op);
dequeue_op = dequeue_read(op);
}
else if (op->opcode == BS_OP_WRITE || op->opcode == BS_OP_WRITE_STABLE)
else if (op->opcode == BS_OP_WRITE || op->opcode == BS_OP_DELETE)
{
if (has_writes == 2)
{
// Some writes already could not be submitted
continue;
// Some writes could not be submitted
break;
}
wr_st = dequeue_write(op);
has_writes = wr_st > 0 ? 1 : 2;
}
else if (op->opcode == BS_OP_DELETE)
{
if (has_writes == 2)
{
// Some writes already could not be submitted
continue;
}
wr_st = dequeue_del(op);
has_writes = wr_st > 0 ? 1 : 2;
dequeue_op = dequeue_write(op);
has_writes = dequeue_op ? 1 : 2;
}
else if (op->opcode == BS_OP_SYNC)
{
@ -169,31 +171,43 @@ void blockstore_impl_t::loop()
// Can't submit SYNC before previous writes
continue;
}
wr_st = continue_sync(op, false);
if (wr_st != 2)
{
has_writes = wr_st > 0 ? 1 : 2;
}
dequeue_op = dequeue_sync(op);
}
else if (op->opcode == BS_OP_STABLE)
{
wr_st = dequeue_stable(op);
if (has_writes == 2)
{
// Don't submit additional flushes before completing previous LISTs
break;
}
dequeue_op = dequeue_stable(op);
}
else if (op->opcode == BS_OP_ROLLBACK)
{
wr_st = dequeue_rollback(op);
if (has_writes == 2)
{
// Don't submit additional flushes before completing previous LISTs
break;
}
dequeue_op = dequeue_rollback(op);
}
else if (op->opcode == BS_OP_LIST)
{
// LIST doesn't need to be blocked by previous modifications
process_list(op);
wr_st = 2;
}
if (wr_st == 2)
// Block LIST operation by previous modifications,
// so it always returns a consistent state snapshot
if (has_writes == 2 || inflight_writes > 0)
has_writes = 2;
else
{
new_idx--;
process_list(op);
dequeue_op = true;
}
if (wr_st == 0)
}
if (dequeue_op)
{
submit_queue.erase(op_ptr);
}
else
{
ringloop->restore(prev_sqe_pos);
if (PRIV(op)->wait_for == WAIT_SQE)
@ -204,14 +218,6 @@ void blockstore_impl_t::loop()
}
}
}
if (op_idx != new_idx)
{
while (op_idx < submit_queue.size())
{
submit_queue[new_idx++] = submit_queue[op_idx++];
}
submit_queue.resize(new_idx);
}
if (!readonly)
{
flusher->loop();
@ -234,7 +240,7 @@ bool blockstore_impl_t::is_safe_to_stop()
{
// It's safe to stop blockstore when there are no in-flight operations,
// no in-progress syncs and flusher isn't doing anything
if (submit_queue.size() > 0 || !readonly && flusher->is_active())
if (submit_queue.size() > 0 || in_progress_syncs.size() > 0 || !readonly && flusher->is_active())
{
return false;
}
@ -265,9 +271,6 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
if (ringloop->space_left() < PRIV(op)->wait_detail)
{
// stop submission if there's still no free space
#ifdef BLOCKSTORE_DEBUG
printf("Still waiting for %lu SQE(s)\n", PRIV(op)->wait_detail);
#endif
return;
}
PRIV(op)->wait_for = 0;
@ -277,35 +280,25 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
if (journal.used_start == PRIV(op)->wait_detail)
{
// do not submit
#ifdef BLOCKSTORE_DEBUG
printf("Still waiting to flush journal offset %08lx\n", PRIV(op)->wait_detail);
#endif
return;
}
flusher->release_trim();
PRIV(op)->wait_for = 0;
}
else if (PRIV(op)->wait_for == WAIT_JOURNAL_BUFFER)
{
int next = ((journal.cur_sector + 1) % journal.sector_count);
if (journal.sector_info[next].flush_count > 0 ||
if (journal.sector_info[next].usage_count > 0 ||
journal.sector_info[next].dirty)
{
// do not submit
#ifdef BLOCKSTORE_DEBUG
printf("Still waiting for a journal buffer\n");
#endif
return;
}
PRIV(op)->wait_for = 0;
}
else if (PRIV(op)->wait_for == WAIT_FREE)
{
if (!data_alloc->get_free_count() && flusher->is_active())
if (!data_alloc->get_free_count() && !flusher->is_active())
{
#ifdef BLOCKSTORE_DEBUG
printf("Still waiting for free space on the data device\n");
#endif
return;
}
PRIV(op)->wait_for = 0;
@ -316,15 +309,16 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
}
}
void blockstore_impl_t::enqueue_op(blockstore_op_t *op)
void blockstore_impl_t::enqueue_op(blockstore_op_t *op, bool first)
{
if (op->opcode < BS_OP_MIN || op->opcode > BS_OP_MAX ||
((op->opcode == BS_OP_READ || op->opcode == BS_OP_WRITE || op->opcode == BS_OP_WRITE_STABLE) && (
((op->opcode == BS_OP_READ || op->opcode == BS_OP_WRITE) && (
op->offset >= block_size ||
op->len > block_size-op->offset ||
(op->len % disk_alignment)
)) ||
readonly && op->opcode != BS_OP_READ && op->opcode != BS_OP_LIST)
readonly && op->opcode != BS_OP_READ && op->opcode != BS_OP_LIST ||
first && op->opcode == BS_OP_WRITE)
{
// Basic verification not passed
op->retval = -EINVAL;
@ -369,215 +363,109 @@ void blockstore_impl_t::enqueue_op(blockstore_op_t *op)
}
};
}
if ((op->opcode == BS_OP_WRITE || op->opcode == BS_OP_WRITE_STABLE || op->opcode == BS_OP_DELETE) && !enqueue_write(op))
if (op->opcode == BS_OP_WRITE && !enqueue_write(op))
{
std::function<void (blockstore_op_t*)>(op->callback)(op);
return;
}
if (op->opcode == BS_OP_SYNC && immediate_commit == IMMEDIATE_ALL)
{
op->retval = 0;
std::function<void (blockstore_op_t*)>(op->callback)(op);
return;
}
// Call constructor without allocating memory. We'll call destructor before returning op back
new ((void*)op->private_data) blockstore_op_private_t;
PRIV(op)->wait_for = 0;
PRIV(op)->op_state = 0;
PRIV(op)->pending_ops = 0;
if (!first)
{
submit_queue.push_back(op);
ringloop->wakeup();
}
static bool replace_stable(object_id oid, uint64_t version, int search_start, int search_end, obj_ver_id* list)
{
while (search_start < search_end)
{
int pos = search_start+(search_end-search_start)/2;
if (oid < list[pos].oid)
{
search_end = pos;
}
else if (list[pos].oid < oid)
{
search_start = pos+1;
}
else
{
list[pos].version = version;
return true;
submit_queue.push_front(op);
}
}
return false;
ringloop->wakeup();
}
void blockstore_impl_t::process_list(blockstore_op_t *op)
{
// Count objects
uint32_t list_pg = op->offset;
uint32_t pg_count = op->len;
uint64_t pg_stripe_size = op->oid.stripe;
uint64_t min_inode = op->oid.inode;
uint64_t max_inode = op->version;
// Check PG
if (pg_count != 0 && (pg_stripe_size < MIN_BLOCK_SIZE || list_pg >= pg_count))
{
op->retval = -EINVAL;
FINISH_OP(op);
return;
}
// Copy clean_db entries (sorted)
int stable_count = 0, stable_alloc = clean_db.size() / (pg_count ? pg_count : 1);
obj_ver_id *stable = (obj_ver_id*)malloc(sizeof(obj_ver_id) * stable_alloc);
if (!stable)
uint64_t stable_count = 0;
if (pg_count > 0)
{
for (auto it = clean_db.begin(); it != clean_db.end(); it++)
{
uint32_t pg = (it->first.inode + it->first.stripe / pg_stripe_size) % pg_count;
if (pg == list_pg)
{
stable_count++;
}
}
}
else
{
stable_count = clean_db.size();
}
uint64_t total_count = stable_count;
for (auto it = dirty_db.begin(); it != dirty_db.end(); it++)
{
if (!pg_count || ((it->first.oid.inode + it->first.oid.stripe / pg_stripe_size) % pg_count) == list_pg)
{
if (IS_STABLE(it->second.state))
{
stable_count++;
}
total_count++;
}
}
// Allocate memory
op->version = stable_count;
op->retval = total_count;
op->buf = malloc(sizeof(obj_ver_id) * total_count);
if (!op->buf)
{
op->retval = -ENOMEM;
FINISH_OP(op);
return;
}
obj_ver_id *vers = (obj_ver_id*)op->buf;
int i = 0;
for (auto it = clean_db.begin(); it != clean_db.end(); it++)
{
auto clean_it = clean_db.begin(), clean_end = clean_db.end();
if ((min_inode != 0 || max_inode != 0) && min_inode <= max_inode)
if (!pg_count || ((it->first.inode + it->first.stripe / pg_stripe_size) % pg_count) == list_pg)
{
clean_it = clean_db.lower_bound({
.inode = min_inode,
.stripe = 0,
});
clean_end = clean_db.upper_bound({
.inode = max_inode,
.stripe = UINT64_MAX,
});
}
for (; clean_it != clean_end; clean_it++)
{
if (!pg_count || ((clean_it->first.inode + clean_it->first.stripe / pg_stripe_size) % pg_count) == list_pg)
{
if (stable_count >= stable_alloc)
{
stable_alloc += 32768;
stable = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
if (!stable)
{
op->retval = -ENOMEM;
FINISH_OP(op);
return;
}
}
stable[stable_count++] = {
.oid = clean_it->first,
.version = clean_it->second.version,
vers[i++] = {
.oid = it->first,
.version = it->second.version,
};
}
}
}
int clean_stable_count = stable_count;
// Copy dirty_db entries (sorted, too)
int unstable_count = 0, unstable_alloc = 0;
obj_ver_id *unstable = NULL;
int j = stable_count;
for (auto it = dirty_db.begin(); it != dirty_db.end(); it++)
{
auto dirty_it = dirty_db.begin(), dirty_end = dirty_db.end();
if ((min_inode != 0 || max_inode != 0) && min_inode <= max_inode)
if (!pg_count || ((it->first.oid.inode + it->first.oid.stripe / pg_stripe_size) % pg_count) == list_pg)
{
dirty_it = dirty_db.lower_bound({
.oid = {
.inode = min_inode,
.stripe = 0,
},
.version = 0,
});
dirty_end = dirty_db.upper_bound({
.oid = {
.inode = max_inode,
.stripe = UINT64_MAX,
},
.version = UINT64_MAX,
});
}
for (; dirty_it != dirty_end; dirty_it++)
if (IS_STABLE(it->second.state))
{
if (!pg_count || ((dirty_it->first.oid.inode + dirty_it->first.oid.stripe / pg_stripe_size) % pg_count) == list_pg)
{
if (IS_DELETE(dirty_it->second.state))
{
// Deletions are always stable, so try to zero out two possible entries
if (!replace_stable(dirty_it->first.oid, 0, 0, clean_stable_count, stable))
{
replace_stable(dirty_it->first.oid, 0, clean_stable_count, stable_count, stable);
}
}
else if (IS_STABLE(dirty_it->second.state))
{
// First try to replace a clean stable version in the first part of the list
if (!replace_stable(dirty_it->first.oid, dirty_it->first.version, 0, clean_stable_count, stable))
{
// Then try to replace the last dirty stable version in the second part of the list
if (stable_count > 0 && stable[stable_count-1].oid == dirty_it->first.oid)
{
stable[stable_count-1].version = dirty_it->first.version;
vers[i++] = it->first;
}
else
{
if (stable_count >= stable_alloc)
{
stable_alloc += 32768;
stable = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
if (!stable)
{
if (unstable)
free(unstable);
op->retval = -ENOMEM;
FINISH_OP(op);
return;
}
}
stable[stable_count++] = dirty_it->first;
vers[j++] = it->first;
}
}
}
else
{
if (unstable_count >= unstable_alloc)
{
unstable_alloc += 32768;
unstable = (obj_ver_id*)realloc(unstable, sizeof(obj_ver_id) * unstable_alloc);
if (!unstable)
{
if (stable)
free(stable);
op->retval = -ENOMEM;
FINISH_OP(op);
return;
}
}
unstable[unstable_count++] = dirty_it->first;
}
}
}
}
// Remove zeroed out stable entries
int j = 0;
for (int i = 0; i < stable_count; i++)
{
if (stable[i].version != 0)
{
stable[j++] = stable[i];
}
}
stable_count = j;
if (stable_count+unstable_count > stable_alloc)
{
stable_alloc = stable_count+unstable_count;
stable = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
if (!stable)
{
if (unstable)
free(unstable);
op->retval = -ENOMEM;
FINISH_OP(op);
return;
}
}
// Copy unstable entries
for (int i = 0; i < unstable_count; i++)
{
stable[j++] = unstable[i];
}
free(unstable);
op->version = stable_count;
op->retval = stable_count+unstable_count;
op->buf = stable;
FINISH_OP(op);
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#include "blockstore.h"
@ -10,6 +7,7 @@
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <malloc.h>
#include <linux/fs.h>
#include <vector>
@ -19,45 +17,56 @@
#include "cpp-btree/btree_map.h"
#include "malloc_or_die.h"
#include "allocator.h"
//#define BLOCKSTORE_DEBUG
// States are not stored on disk. Instead, they're deduced from the journal
// FIXME: Rename to BS_ST_*
#define BS_ST_SMALL_WRITE 0x01
#define BS_ST_BIG_WRITE 0x02
#define BS_ST_DELETE 0x03
#define ST_J_WAIT_BIG 1
#define ST_J_IN_FLIGHT 2
#define ST_J_SUBMITTED 3
#define ST_J_WRITTEN 4
#define ST_J_SYNCED 5
#define ST_J_STABLE 6
#define BS_ST_WAIT_DEL 0x10
#define BS_ST_WAIT_BIG 0x20
#define BS_ST_IN_FLIGHT 0x30
#define BS_ST_SUBMITTED 0x40
#define BS_ST_WRITTEN 0x50
#define BS_ST_SYNCED 0x60
#define BS_ST_STABLE 0x70
#define ST_D_IN_FLIGHT 15
#define ST_D_SUBMITTED 16
#define ST_D_WRITTEN 17
#define ST_D_SYNCED 20
#define ST_D_STABLE 21
#define BS_ST_INSTANT 0x100
#define ST_DEL_IN_FLIGHT 31
#define ST_DEL_SUBMITTED 32
#define ST_DEL_WRITTEN 33
#define ST_DEL_SYNCED 34
#define ST_DEL_STABLE 35
#define ST_CURRENT 48
#define IMMEDIATE_NONE 0
#define IMMEDIATE_SMALL 1
#define IMMEDIATE_ALL 2
#define BS_ST_TYPE_MASK 0x0F
#define BS_ST_WORKFLOW_MASK 0xF0
#define IS_IN_FLIGHT(st) (((st) & 0xF0) <= BS_ST_SUBMITTED)
#define IS_STABLE(st) (((st) & 0xF0) == BS_ST_STABLE)
#define IS_SYNCED(st) (((st) & 0xF0) >= BS_ST_SYNCED)
#define IS_JOURNAL(st) (((st) & 0x0F) == BS_ST_SMALL_WRITE)
#define IS_BIG_WRITE(st) (((st) & 0x0F) == BS_ST_BIG_WRITE)
#define IS_DELETE(st) (((st) & 0x0F) == BS_ST_DELETE)
#define IS_IN_FLIGHT(st) (st == ST_J_WAIT_BIG || st == ST_J_IN_FLIGHT || st == ST_D_IN_FLIGHT || st == ST_DEL_IN_FLIGHT || st == ST_J_SUBMITTED || st == ST_D_SUBMITTED || st == ST_DEL_SUBMITTED)
#define IS_STABLE(st) (st == ST_J_STABLE || st == ST_D_STABLE || st == ST_DEL_STABLE || st == ST_CURRENT)
#define IS_SYNCED(st) (IS_STABLE(st) || st == ST_J_SYNCED || st == ST_D_SYNCED || st == ST_DEL_SYNCED)
#define IS_JOURNAL(st) (st >= ST_J_WAIT_BIG && st <= ST_J_STABLE)
#define IS_BIG_WRITE(st) (st >= ST_D_IN_FLIGHT && st <= ST_D_STABLE)
#define IS_DELETE(st) (st >= ST_DEL_IN_FLIGHT && st <= ST_DEL_STABLE)
#define IS_UNSYNCED(st) (st >= ST_J_WAIT_BIG && st <= ST_J_WRITTEN || st >= ST_D_IN_FLIGHT && st <= ST_D_WRITTEN|| st >= ST_DEL_IN_FLIGHT && st <= ST_DEL_WRITTEN)
#define BS_SUBMIT_GET_SQE(sqe, data) \
BS_SUBMIT_GET_ONLY_SQE(sqe); \
struct ring_data_t *data = ((ring_data_t*)sqe->user_data)
#define BS_SUBMIT_GET_ONLY_SQE(sqe) \
{\
timespec now;\
clock_gettime(CLOCK_REALTIME, &now);\
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);\
}\
struct io_uring_sqe *sqe = get_sqe();\
if (!sqe)\
{\
@ -67,6 +76,11 @@
}
#define BS_SUBMIT_GET_SQE_DECL(sqe) \
{\
timespec now;\
clock_gettime(CLOCK_REALTIME, &now);\
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);\
}\
sqe = get_sqe();\
if (!sqe)\
{\
@ -77,8 +91,7 @@
#include "blockstore_journal.h"
// 32 bytes = 24 bytes + block bitmap (4 bytes by default) + external attributes (also bitmap, 4 bytes by default)
// per "clean" entry on disk with fixed metadata tables
// 24 bytes + block bitmap per "clean" entry on disk with fixed metadata tables
// FIXME: maybe add crc32's to metadata
struct __attribute__((__packed__)) clean_disk_entry
{
@ -94,7 +107,7 @@ struct __attribute__((__packed__)) clean_entry
uint64_t location;
};
// 64 = 24 + 40 bytes per dirty entry in memory (obj_ver_id => dirty_entry)
// 56 = 24 + 32 bytes per dirty entry in memory (obj_ver_id => dirty_entry)
struct __attribute__((__packed__)) dirty_entry
{
uint32_t state;
@ -103,7 +116,6 @@ struct __attribute__((__packed__)) dirty_entry
uint32_t offset; // data offset within object (stripe)
uint32_t len; // data length
uint64_t journal_sector; // journal sector used for this entry
void* bitmap; // either external bitmap itself when it fits, or a pointer to it when it doesn't
};
// - Sync must be submitted after previous writes/deletes (not before!)
@ -156,12 +168,12 @@ struct blockstore_op_private_t
// Write
struct iovec iov_zerofill[3];
// Warning: must not have a default value here because it's written to before calling constructor in blockstore_write.cpp O_o
uint64_t real_version;
// Sync
std::vector<obj_ver_id> sync_big_writes, sync_small_writes;
int sync_small_checked, sync_big_checked;
std::list<blockstore_op_t*>::iterator in_progress_ptr;
int prev_sync_count;
};
// https://github.com/algorithm-ninja/cpp-btree
@ -199,10 +211,7 @@ class blockstore_impl_t
// Suitable only for server SSDs with capacitors, requires disabled data and journal fsyncs
int immediate_commit = IMMEDIATE_NONE;
bool inmemory_meta = false;
// Maximum flusher count
unsigned flusher_count;
// Maximum queue depth
unsigned max_write_iodepth = 128;
int flusher_count;
/******* END OF OPTIONS *******/
struct ring_consumer_t ring_consumer;
@ -210,8 +219,9 @@ class blockstore_impl_t
blockstore_clean_db_t clean_db;
uint8_t *clean_bitmap = NULL;
blockstore_dirty_db_t dirty_db;
std::vector<blockstore_op_t*> submit_queue;
std::list<blockstore_op_t*> submit_queue; // FIXME: funny thing is that vector is better here
std::vector<obj_ver_id> unsynced_big_writes, unsynced_small_writes;
std::list<blockstore_op_t*> in_progress_syncs; // ...and probably here, too
allocator *data_alloc = NULL;
uint8_t *zero_object;
@ -228,10 +238,10 @@ class blockstore_impl_t
struct journal_t journal;
journal_flusher_t *flusher;
int write_iodepth = 0;
bool live = false, queue_stall = false;
ring_loop_t *ringloop;
int inflight_writes = 0;
bool stop_sync_submitted;
@ -251,7 +261,6 @@ class blockstore_impl_t
void open_data();
void open_meta();
void open_journal();
uint8_t* get_clean_entry_bitmap(uint64_t block_loc, int offset);
// Asynchronous init
int initialized;
@ -271,7 +280,6 @@ class blockstore_impl_t
// Write
bool enqueue_write(blockstore_op_t *op);
void cancel_all_writes(blockstore_op_t *op, blockstore_dirty_db_t::iterator dirty_it, int retval);
int dequeue_write(blockstore_op_t *op);
int dequeue_del(blockstore_op_t *op);
int continue_write(blockstore_op_t *op);
@ -279,21 +287,21 @@ class blockstore_impl_t
void handle_write_event(ring_data_t *data, blockstore_op_t *op);
// Sync
int continue_sync(blockstore_op_t *op, bool queue_has_in_progress_sync);
int dequeue_sync(blockstore_op_t *op);
void handle_sync_event(ring_data_t *data, blockstore_op_t *op);
void ack_sync(blockstore_op_t *op);
int continue_sync(blockstore_op_t *op);
void ack_one_sync(blockstore_op_t *op);
int ack_sync(blockstore_op_t *op);
// Stabilize
int dequeue_stable(blockstore_op_t *op);
int continue_stable(blockstore_op_t *op);
void mark_stable(const obj_ver_id & ov);
void handle_stable_event(ring_data_t *data, blockstore_op_t *op);
void stabilize_object(object_id oid, uint64_t max_ver);
// Rollback
int dequeue_rollback(blockstore_op_t *op);
int continue_rollback(blockstore_op_t *op);
void mark_rolled_back(const obj_ver_id & ov);
void handle_rollback_event(ring_data_t *data, blockstore_op_t *op);
void erase_dirty(blockstore_dirty_db_t::iterator dirty_start, blockstore_dirty_db_t::iterator dirty_end, uint64_t clean_loc);
@ -321,16 +329,13 @@ public:
bool is_stalled();
// Submission
void enqueue_op(blockstore_op_t *op);
void enqueue_op(blockstore_op_t *op, bool first = false);
// Unstable writes are added here (map of object_id -> version)
std::unordered_map<object_id, uint64_t> unstable_writes;
// Space usage statistics
std::map<uint64_t, uint64_t> inode_space_stats;
inline uint32_t get_block_size() { return block_size; }
inline uint64_t get_block_count() { return block_count; }
inline uint64_t get_free_block_count() { return data_alloc->get_free_count(); }
inline uint32_t get_bitmap_granularity() { return disk_alignment; }
inline uint32_t get_disk_alignment() { return disk_alignment; }
};

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
blockstore_init_meta::blockstore_init_meta(blockstore_impl_t *bs)
@ -100,7 +97,7 @@ void blockstore_init_meta::handle_entries(void* entries, unsigned count, int blo
clean_disk_entry *entry = (clean_disk_entry*)(entries + i*bs->clean_entry_size);
if (!bs->inmemory_meta && bs->clean_entry_bitmap_size)
{
memcpy(bs->clean_bitmap + (done_cnt+i)*2*bs->clean_entry_bitmap_size, &entry->bitmap, 2*bs->clean_entry_bitmap_size);
memcpy(bs->clean_bitmap + (done_cnt+i)*bs->clean_entry_bitmap_size, &entry->bitmap, bs->clean_entry_bitmap_size);
}
if (entry->oid.inode > 0)
{
@ -111,17 +108,13 @@ void blockstore_init_meta::handle_entries(void* entries, unsigned count, int blo
{
// free the previous block
#ifdef BLOCKSTORE_DEBUG
printf("Free block %lu (new location is %lu)\n", clean_it->second.location >> block_order, done_cnt+i);
printf("Free block %lu\n", clean_it->second.location >> bs->block_order);
#endif
bs->data_alloc->set(clean_it->second.location >> block_order, false);
}
else
{
bs->inode_space_stats[entry->oid.inode] += bs->block_size;
}
entries_loaded++;
#ifdef BLOCKSTORE_DEBUG
printf("Allocate block (clean entry) %lu: %lx:%lx v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
printf("Allocate block (clean entry) %lu: %lu:%lu v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
#endif
bs->data_alloc->set(done_cnt+i, true);
bs->clean_db[entry->oid] = (struct clean_entry){
@ -132,7 +125,7 @@ void blockstore_init_meta::handle_entries(void* entries, unsigned count, int blo
else
{
#ifdef BLOCKSTORE_DEBUG
printf("Old clean entry %lu: %lx:%lx v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
printf("Old clean entry %lu: %lu:%lu v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
#endif
}
}
@ -209,7 +202,11 @@ int blockstore_init_journal::loop()
goto resume_7;
printf("Reading blockstore journal\n");
if (!bs->journal.inmemory)
submitted_buf = memalign_or_die(MEM_ALIGNMENT, 2*bs->journal.block_size);
{
submitted_buf = memalign(MEM_ALIGNMENT, 2*bs->journal.block_size);
if (!submitted_buf)
throw std::bad_alloc();
}
else
submitted_buf = bs->journal.buffer;
// Read first block of the journal
@ -320,7 +317,7 @@ resume_1:
if (journal_pos < bs->journal.used_start)
end = bs->journal.used_start;
if (!bs->journal.inmemory)
submitted_buf = memalign_or_die(MEM_ALIGNMENT, JOURNAL_BUFFER_SIZE);
submitted_buf = memalign(MEM_ALIGNMENT, JOURNAL_BUFFER_SIZE);
else
submitted_buf = bs->journal.buffer + journal_pos;
data->iov = {
@ -403,10 +400,11 @@ resume_1:
}
}
}
bs->flusher->mark_trim_possible();
// Trim journal on start so we don't stall when all entries are older
bs->journal.trim();
bs->journal.dirty_start = bs->journal.next_free;
printf(
"Journal entries loaded: %lu, free journal space: %lu bytes (%08lx..%08lx is used), free blocks: %lu / %lu\n",
"Journal entries loaded: %lu, free journal space: %lu bytes (%lu..%lu is used), free blocks: %lu / %lu\n",
entries_loaded,
(bs->journal.next_free >= bs->journal.used_start
? bs->journal.len-bs->journal.block_size - (bs->journal.next_free-bs->journal.used_start)
@ -456,15 +454,10 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
break;
}
}
if (je->type == JE_SMALL_WRITE || je->type == JE_SMALL_WRITE_INSTANT)
if (je->type == JE_SMALL_WRITE)
{
#ifdef BLOCKSTORE_DEBUG
printf(
"je_small_write%s oid=%lx:%lx ver=%lu offset=%u len=%u\n",
je->type == JE_SMALL_WRITE_INSTANT ? "_instant" : "",
je->small_write.oid.inode, je->small_write.oid.stripe, je->small_write.version,
je->small_write.offset, je->small_write.len
);
printf("je_small_write oid=%lu:%lu ver=%lu offset=%u len=%u\n", je->small_write.oid.inode, je->small_write.oid.stripe, je->small_write.version, je->small_write.offset, je->small_write.len);
#endif
// oid, version, offset, len
uint64_t prev_free = next_free;
@ -482,7 +475,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
if (location != je->small_write.data_offset)
{
char err[1024];
snprintf(err, 1024, "BUG: calculated journal data offset (%08lx) != stored journal data offset (%08lx)", location, je->small_write.data_offset);
snprintf(err, 1024, "BUG: calculated journal data offset (%lu) != stored journal data offset (%lu)", location, je->small_write.data_offset);
throw std::runtime_error(err);
}
uint32_t data_crc32 = 0;
@ -534,99 +527,27 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
.oid = je->small_write.oid,
.version = je->small_write.version,
};
void *bmp = (void*)je + sizeof(journal_entry_small_write);
if (bs->clean_entry_bitmap_size <= sizeof(void*))
{
memcpy(&bmp, bmp, bs->clean_entry_bitmap_size);
}
else if (!bs->journal.inmemory)
{
// FIXME Using large blockstore objects and not keeping journal in memory
// will result in a lot of small allocations for entry bitmaps. This can
// only be fixed by using a patched map with dynamic entry size, but not
// the btree_map, because it doesn't keep iterators valid all the time.
void *bmp_cp = malloc_or_die(bs->clean_entry_bitmap_size);
memcpy(bmp_cp, bmp, bs->clean_entry_bitmap_size);
bmp = bmp_cp;
}
bs->dirty_db.emplace(ov, (dirty_entry){
.state = (BS_ST_SMALL_WRITE | BS_ST_SYNCED),
.state = ST_J_SYNCED,
.flags = 0,
.location = location,
.offset = je->small_write.offset,
.len = je->small_write.len,
.journal_sector = proc_pos,
.bitmap = bmp,
});
bs->journal.used_sectors[proc_pos]++;
#ifdef BLOCKSTORE_DEBUG
printf(
"journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
proc_pos, ov.oid.inode, ov.oid.stripe, ov.version, bs->journal.used_sectors[proc_pos]
);
printf("journal offset %lu is used by %lu:%lu v%lu\n", proc_pos, ov.oid.inode, ov.oid.stripe, ov.version);
#endif
auto & unstab = bs->unstable_writes[ov.oid];
unstab = unstab < ov.version ? ov.version : unstab;
if (je->type == JE_SMALL_WRITE_INSTANT)
{
bs->mark_stable(ov);
}
}
}
else if (je->type == JE_BIG_WRITE || je->type == JE_BIG_WRITE_INSTANT)
else if (je->type == JE_BIG_WRITE)
{
#ifdef BLOCKSTORE_DEBUG
printf(
"je_big_write%s oid=%lx:%lx ver=%lu loc=%lu\n",
je->type == JE_BIG_WRITE_INSTANT ? "_instant" : "",
je->big_write.oid.inode, je->big_write.oid.stripe, je->big_write.version, je->big_write.location >> bs->block_order
);
printf("je_big_write oid=%lu:%lu ver=%lu loc=%lu\n", je->big_write.oid.inode, je->big_write.oid.stripe, je->big_write.version, je->big_write.location);
#endif
auto dirty_it = bs->dirty_db.upper_bound((obj_ver_id){
.oid = je->big_write.oid,
.version = UINT64_MAX,
});
if (dirty_it != bs->dirty_db.begin() && bs->dirty_db.size() > 0)
{
dirty_it--;
if (dirty_it->first.oid == je->big_write.oid &&
dirty_it->first.version >= je->big_write.version &&
(dirty_it->second.state & BS_ST_TYPE_MASK) == BS_ST_DELETE)
{
// It is allowed to overwrite a deleted object with a
// version number smaller than deletion version number,
// because the presence of a BIG_WRITE entry means that
// its data and metadata are already flushed.
// We don't know if newer versions are flushed, but
// the previous delete definitely is.
// So we flush previous dirty entries, but retain the clean one.
// This feature is required for writes happening shortly
// after deletes.
auto dirty_end = dirty_it;
dirty_end++;
while (1)
{
if (dirty_it == bs->dirty_db.begin())
{
break;
}
dirty_it--;
if (dirty_it->first.oid != je->big_write.oid)
{
dirty_it++;
break;
}
}
auto clean_it = bs->clean_db.find(je->big_write.oid);
bs->erase_dirty(
dirty_it, dirty_end,
clean_it != bs->clean_db.end() ? clean_it->second.location : UINT64_MAX
);
// Remove it from the flusher's queue, too
// Otherwise it may end up referring to a small unstable write after reading the rest of the journal
bs->flusher->remove_flush(je->big_write.oid);
}
}
auto clean_it = bs->clean_db.find(je->big_write.oid);
if (clean_it == bs->clean_db.end() ||
clean_it->second.version < je->big_write.version)
@ -636,89 +557,124 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
.oid = je->big_write.oid,
.version = je->big_write.version,
};
void *bmp = (void*)je + sizeof(journal_entry_big_write);
if (bs->clean_entry_bitmap_size <= sizeof(void*))
{
memcpy(&bmp, bmp, bs->clean_entry_bitmap_size);
}
else if (!bs->journal.inmemory)
{
// FIXME Using large blockstore objects and not keeping journal in memory
// will result in a lot of small allocations for entry bitmaps. This can
// only be fixed by using a patched map with dynamic entry size, but not
// the btree_map, because it doesn't keep iterators valid all the time.
void *bmp_cp = malloc_or_die(bs->clean_entry_bitmap_size);
memcpy(bmp_cp, bmp, bs->clean_entry_bitmap_size);
bmp = bmp_cp;
}
bs->dirty_db.emplace(ov, (dirty_entry){
.state = (BS_ST_BIG_WRITE | BS_ST_SYNCED),
.state = ST_D_SYNCED,
.flags = 0,
.location = je->big_write.location,
.offset = je->big_write.offset,
.len = je->big_write.len,
.journal_sector = proc_pos,
.bitmap = bmp,
});
#ifdef BLOCKSTORE_DEBUG
printf("Allocate block %lu\n", je->big_write.location >> bs->block_order);
#endif
bs->data_alloc->set(je->big_write.location >> bs->block_order, true);
bs->journal.used_sectors[proc_pos]++;
#ifdef BLOCKSTORE_DEBUG
printf(
"journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
proc_pos, ov.oid.inode, ov.oid.stripe, ov.version, bs->journal.used_sectors[proc_pos]
);
#endif
auto & unstab = bs->unstable_writes[ov.oid];
unstab = unstab < ov.version ? ov.version : unstab;
if (je->type == JE_BIG_WRITE_INSTANT)
{
bs->mark_stable(ov);
}
}
}
else if (je->type == JE_STABLE)
{
#ifdef BLOCKSTORE_DEBUG
printf("je_stable oid=%lx:%lx ver=%lu\n", je->stable.oid.inode, je->stable.oid.stripe, je->stable.version);
printf("je_stable oid=%lu:%lu ver=%lu\n", je->stable.oid.inode, je->stable.oid.stripe, je->stable.version);
#endif
// oid, version
obj_ver_id ov = {
.oid = je->stable.oid,
.version = je->stable.version,
};
bs->mark_stable(ov);
auto it = bs->dirty_db.find(ov);
if (it == bs->dirty_db.end())
{
// journal contains a legitimate STABLE entry for a non-existing dirty write
// this probably means that journal was trimmed between WRITE and STABLE entries
// skip it
}
else
{
while (1)
{
it->second.state = (it->second.state == ST_D_SYNCED
? ST_D_STABLE
: (it->second.state == ST_DEL_SYNCED ? ST_DEL_STABLE : ST_J_STABLE));
if (it == bs->dirty_db.begin())
break;
it--;
if (it->first.oid != ov.oid || IS_STABLE(it->second.state))
break;
}
bs->flusher->enqueue_flush(ov);
}
auto unstab_it = bs->unstable_writes.find(ov.oid);
if (unstab_it != bs->unstable_writes.end() && unstab_it->second <= ov.version)
{
bs->unstable_writes.erase(unstab_it);
}
}
else if (je->type == JE_ROLLBACK)
{
#ifdef BLOCKSTORE_DEBUG
printf("je_rollback oid=%lx:%lx ver=%lu\n", je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version);
printf("je_rollback oid=%lu:%lu ver=%lu\n", je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version);
#endif
// rollback dirty writes of <oid> up to <version>
obj_ver_id ov = {
auto it = bs->dirty_db.lower_bound((obj_ver_id){
.oid = je->rollback.oid,
.version = je->rollback.version,
};
bs->mark_rolled_back(ov);
.version = UINT64_MAX,
});
if (it != bs->dirty_db.begin())
{
uint64_t max_unstable = 0;
auto rm_start = it;
auto rm_end = it;
it--;
while (it->first.oid == je->rollback.oid &&
it->first.version > je->rollback.version &&
!IS_IN_FLIGHT(it->second.state) &&
!IS_STABLE(it->second.state))
{
if (it->first.oid != je->rollback.oid)
break;
else if (it->first.version <= je->rollback.version)
{
if (!IS_STABLE(it->second.state))
max_unstable = it->first.version;
break;
}
else if (IS_STABLE(it->second.state))
break;
// Remove entry
rm_start = it;
if (it == bs->dirty_db.begin())
break;
it--;
}
if (rm_start != rm_end)
{
bs->erase_dirty(rm_start, rm_end, UINT64_MAX);
}
auto unstab_it = bs->unstable_writes.find(je->rollback.oid);
if (unstab_it != bs->unstable_writes.end())
{
if (max_unstable == 0)
bs->unstable_writes.erase(unstab_it);
else
unstab_it->second = max_unstable;
}
}
}
else if (je->type == JE_DELETE)
{
#ifdef BLOCKSTORE_DEBUG
printf("je_delete oid=%lx:%lx ver=%lu\n", je->del.oid.inode, je->del.oid.stripe, je->del.version);
printf("je_delete oid=%lu:%lu ver=%lu\n", je->del.oid.inode, je->del.oid.stripe, je->del.version);
#endif
auto clean_it = bs->clean_db.find(je->del.oid);
if (clean_it != bs->clean_db.end() &&
clean_it->second.version < je->del.version)
{
// oid, version
obj_ver_id ov = {
.oid = je->del.oid,
.version = je->del.version,
};
bs->dirty_db.emplace(ov, (dirty_entry){
.state = (BS_ST_DELETE | BS_ST_SYNCED),
.state = ST_DEL_SYNCED,
.flags = 0,
.location = 0,
.offset = 0,
@ -726,10 +682,6 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
.journal_sector = proc_pos,
});
bs->journal.used_sectors[proc_pos]++;
// Deletions are treated as immediately stable, because
// "2-phase commit" (write->stabilize) isn't sufficient for them anyway
bs->mark_stable(ov);
}
}
started = true;
pos += je->size;

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
class blockstore_init_meta

View File

@ -1,12 +1,9 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
blockstore_journal_check_t::blockstore_journal_check_t(blockstore_impl_t *bs)
{
this->bs = bs;
sectors_to_write = 0;
sectors_required = 0;
next_pos = bs->journal.next_free;
next_sector = bs->journal.cur_sector;
first_sector = -1;
@ -20,26 +17,21 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
int required = entries_required;
while (1)
{
int fits = bs->journal.no_same_sector_overwrites && next_pos == bs->journal.next_free && bs->journal.sector_info[next_sector].written
? 0
: (bs->journal.block_size - next_in_pos) / size;
int fits = (bs->journal.block_size - next_in_pos) / size;
if (fits > 0)
{
if (fits > required)
{
fits = required;
}
if (first_sector == -1)
{
first_sector = next_sector;
}
required -= fits;
next_in_pos += fits * size;
sectors_to_write++;
sectors_required++;
}
else if (bs->journal.sector_info[next_sector].dirty)
{
sectors_to_write++;
// sectors_required is more like "sectors to write"
sectors_required++;
}
if (required <= 0)
{
@ -62,7 +54,7 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
" is too small for a batch of "+std::to_string(entries_required)+" entries of "+std::to_string(size)+" bytes"
);
}
if (bs->journal.sector_info[next_sector].flush_count > 0 ||
if (bs->journal.sector_info[next_sector].usage_count > 0 ||
bs->journal.sector_info[next_sector].dirty)
{
// No memory buffer available. Wait for it.
@ -74,18 +66,17 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
dirty++;
used++;
}
if (bs->journal.sector_info[i].flush_count > 0)
if (bs->journal.sector_info[i].usage_count > 0)
{
used++;
}
}
// In fact, it's even more rare than "ran out of journal space", so print a warning
printf(
"Ran out of journal sector buffers: %d/%lu buffers used (%d dirty), next buffer (%ld)"
" is %s and flushed %lu times. Consider increasing \'journal_sector_buffer_count\'\n",
"Ran out of journal sector buffers: %d/%lu buffers used (%d dirty), next buffer (%ld) is %s and flushed %lu times\n",
used, bs->journal.sector_count, dirty, next_sector,
bs->journal.sector_info[next_sector].dirty ? "dirty" : "not dirty",
bs->journal.sector_info[next_sector].flush_count
bs->journal.sector_info[next_sector].usage_count
);
PRIV(op)->wait_for = WAIT_JOURNAL_BUFFER;
return 0;
@ -104,11 +95,13 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
{
// No space in the journal. Wait until used_start changes.
printf(
"Ran out of journal space (used_start=%08lx, next_free=%08lx, dirty_start=%08lx)\n",
bs->journal.used_start, bs->journal.next_free, bs->journal.dirty_start
"Ran out of journal space (free space: %lu bytes)\n",
(bs->journal.next_free >= bs->journal.used_start
? bs->journal.len-bs->journal.block_size - (bs->journal.next_free-bs->journal.used_start)
: bs->journal.used_start - bs->journal.next_free)
);
PRIV(op)->wait_for = WAIT_JOURNAL;
bs->flusher->request_trim();
bs->flusher->force_start();
PRIV(op)->wait_detail = bs->journal.used_start;
return 0;
}
@ -117,21 +110,20 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
journal_entry* prefill_single_journal_entry(journal_t & journal, uint16_t type, uint32_t size)
{
if (!journal.entry_fits(size))
if (journal.block_size - journal.in_sector_pos < size)
{
assert(!journal.sector_info[journal.cur_sector].dirty);
// Move to the next journal sector
if (journal.sector_info[journal.cur_sector].flush_count > 0)
if (journal.sector_info[journal.cur_sector].usage_count > 0)
{
// Also select next sector buffer in memory
journal.cur_sector = ((journal.cur_sector + 1) % journal.sector_count);
assert(!journal.sector_info[journal.cur_sector].flush_count);
assert(!journal.sector_info[journal.cur_sector].usage_count);
}
else
{
journal.dirty_start = journal.next_free;
}
journal.sector_info[journal.cur_sector].written = false;
journal.sector_info[journal.cur_sector].offset = journal.next_free;
journal.in_sector_pos = 0;
journal.next_free = (journal.next_free+journal.block_size) < journal.len ? journal.next_free + journal.block_size : journal.block_size;
@ -156,8 +148,7 @@ journal_entry* prefill_single_journal_entry(journal_t & journal, uint16_t type,
void prepare_journal_sector_write(journal_t & journal, int cur_sector, io_uring_sqe *sqe, std::function<void(ring_data_t*)> cb)
{
journal.sector_info[cur_sector].dirty = false;
journal.sector_info[cur_sector].written = true;
journal.sector_info[cur_sector].flush_count++;
journal.sector_info[cur_sector].usage_count++;
ring_data_t *data = ((ring_data_t*)sqe->user_data);
data->iov = (struct iovec){
(journal.inmemory
@ -184,13 +175,13 @@ journal_t::~journal_t()
buffer = NULL;
}
uint64_t journal_t::get_trim_pos()
bool journal_t::trim()
{
auto journal_used_it = used_sectors.lower_bound(used_start);
#ifdef BLOCKSTORE_DEBUG
printf(
"Trimming journal (used_start=%08lx, next_free=%08lx, dirty_start=%08lx, new_start=%08lx, new_refcount=%ld)\n",
used_start, next_free, dirty_start,
"Trimming journal (used_start=%08lx, next_free=%08lx, first_used=%08lx, usage_count=%08lx)\n",
used_start, next_free,
journal_used_it == used_sectors.end() ? 0 : journal_used_it->first,
journal_used_it == used_sectors.end() ? 0 : journal_used_it->second
);
@ -202,19 +193,26 @@ uint64_t journal_t::get_trim_pos()
if (journal_used_it == used_sectors.end())
{
// Journal is empty
return next_free;
used_start = next_free;
}
else
{
// next_free does not need updating during trim
return journal_used_it->first;
used_start = journal_used_it->first;
// next_free does not need updating here
}
}
else if (journal_used_it->first > used_start)
{
// Journal is cleared up to <journal_used_it>
return journal_used_it->first;
used_start = journal_used_it->first;
}
else
{
// Can't trim journal
return used_start;
return false;
}
#ifdef BLOCKSTORE_DEBUG
printf("Journal trimmed to %08lx (next_free=%08lx)\n", used_start, next_free);
#endif
return true;
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#include "crc32c.h"
@ -10,8 +7,6 @@
#define JOURNAL_BUFFER_SIZE 4*1024*1024
// We reserve some extra space for future stabilize requests during writes
// FIXME: This value should be dynamic i.e. Blockstore ideally shouldn't allow
// writing more than can be stabilized afterwards
#define JOURNAL_STABILIZE_RESERVATION 65536
// Journal entries
@ -24,9 +19,7 @@
#define JE_STABLE 0x04
#define JE_DELETE 0x05
#define JE_ROLLBACK 0x06
#define JE_SMALL_WRITE_INSTANT 0x07
#define JE_BIG_WRITE_INSTANT 0x08
#define JE_MAX 0x08
#define JE_MAX 0x06
// crc32c comes first to ease calculation and is equal to crc32()
struct __attribute__((__packed__)) journal_entry_start
@ -54,9 +47,6 @@ struct __attribute__((__packed__)) journal_entry_small_write
// data_offset is its offset within journal
uint64_t data_offset;
uint32_t crc32_data;
// small_write and big_write entries are followed by the "external" bitmap
// its size is dynamic and included in journal entry's <size> field
uint8_t bitmap[];
};
struct __attribute__((__packed__)) journal_entry_big_write
@ -71,9 +61,6 @@ struct __attribute__((__packed__)) journal_entry_big_write
uint32_t offset;
uint32_t len;
uint64_t location;
// small_write and big_write entries are followed by the "external" bitmap
// its size is dynamic and included in journal entry's <size> field
uint8_t bitmap[];
};
struct __attribute__((__packed__)) journal_entry_stable
@ -139,8 +126,7 @@ inline uint32_t je_crc32(journal_entry *je)
struct journal_sector_info_t
{
uint64_t offset;
uint64_t flush_count;
bool written;
uint64_t usage_count;
bool dirty;
};
@ -165,7 +151,6 @@ struct journal_t
void *sector_buf = NULL;
journal_sector_info_t *sector_info = NULL;
uint64_t sector_count;
bool no_same_sector_overwrites = false;
int cur_sector = 0;
int in_sector_pos = 0;
@ -175,19 +160,13 @@ struct journal_t
~journal_t();
bool trim();
uint64_t get_trim_pos();
inline bool entry_fits(int size)
{
return !(block_size - in_sector_pos < size ||
no_same_sector_overwrites && sector_info[cur_sector].written);
}
};
struct blockstore_journal_check_t
{
blockstore_impl_t *bs;
uint64_t next_pos, next_sector, next_in_pos;
int sectors_to_write, first_sector;
int sectors_required, first_sector;
bool right_dir; // writing to the end or the beginning of the ring buffer
blockstore_journal_check_t(blockstore_impl_t *bs);

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include <sys/file.h>
#include "blockstore_impl.h"
@ -62,15 +59,12 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
journal_device = config["journal_device"];
journal.offset = strtoull(config["journal_offset"].c_str(), NULL, 10);
journal.sector_count = strtoull(config["journal_sector_buffer_count"].c_str(), NULL, 10);
journal.no_same_sector_overwrites = config["journal_no_same_sector_overwrites"] == "true" ||
config["journal_no_same_sector_overwrites"] == "1" || config["journal_no_same_sector_overwrites"] == "yes";
journal.inmemory = config["inmemory_journal"] != "false";
disk_alignment = strtoull(config["disk_alignment"].c_str(), NULL, 10);
journal_block_size = strtoull(config["journal_block_size"].c_str(), NULL, 10);
meta_block_size = strtoull(config["meta_block_size"].c_str(), NULL, 10);
bitmap_granularity = strtoull(config["bitmap_granularity"].c_str(), NULL, 10);
flusher_count = strtoull(config["flusher_count"].c_str(), NULL, 10);
max_write_iodepth = strtoull(config["max_write_iodepth"].c_str(), NULL, 10);
// Validate
if (!block_size)
{
@ -84,17 +78,13 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
{
flusher_count = 32;
}
if (!max_write_iodepth)
{
max_write_iodepth = 128;
}
if (!disk_alignment)
{
disk_alignment = 4096;
}
else if (disk_alignment % MEM_ALIGNMENT)
{
throw std::runtime_error("disk_alignment must be a multiple of "+std::to_string(MEM_ALIGNMENT));
throw std::runtime_error("disk_alingment must be a multiple of "+std::to_string(MEM_ALIGNMENT));
}
if (!journal_block_size)
{
@ -118,7 +108,7 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
}
if (!bitmap_granularity)
{
bitmap_granularity = DEFAULT_BITMAP_GRANULARITY;
bitmap_granularity = 4096;
}
else if (bitmap_granularity % disk_alignment)
{
@ -170,7 +160,7 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
}
// init some fields
clean_entry_bitmap_size = block_size / bitmap_granularity / 8;
clean_entry_size = sizeof(clean_disk_entry) + 2*clean_entry_bitmap_size;
clean_entry_size = sizeof(clean_disk_entry) + clean_entry_bitmap_size;
journal.block_size = journal_block_size;
journal.next_free = journal_block_size;
journal.used_start = journal_block_size;
@ -237,7 +227,7 @@ void blockstore_impl_t::calc_lengths()
}
else if (clean_entry_bitmap_size)
{
clean_bitmap = (uint8_t*)malloc(block_count * 2*clean_entry_bitmap_size);
clean_bitmap = (uint8_t*)malloc(block_count * clean_entry_bitmap_size);
if (!clean_bitmap)
throw std::runtime_error("Failed to allocate memory for the metadata sparse write bitmap");
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
int blockstore_impl_t::fulfill_read_push(blockstore_op_t *op, void *buf, uint64_t offset, uint64_t len,
@ -40,7 +37,6 @@ int blockstore_impl_t::fulfill_read_push(blockstore_op_t *op, void *buf, uint64_
return 1;
}
// FIXME I've seen a bug here so I want some tests
int blockstore_impl_t::fulfill_read(blockstore_op_t *read_op, uint64_t &fulfilled, uint32_t item_start, uint32_t item_end,
uint32_t item_state, uint64_t item_version, uint64_t item_location)
{
@ -53,20 +49,8 @@ int blockstore_impl_t::fulfill_read(blockstore_op_t *read_op, uint64_t &fulfille
while (1)
{
for (; it != PRIV(read_op)->read_vec.end(); it++)
{
if (it->offset >= cur_start)
{
break;
}
else if (it->offset + it->len > cur_start)
{
cur_start = it->offset + it->len;
if (cur_start >= item_end)
{
goto endwhile;
}
}
}
if (it == PRIV(read_op)->read_vec.end() || it->offset > cur_start)
{
fulfill_read_t el = {
@ -85,30 +69,12 @@ int blockstore_impl_t::fulfill_read(blockstore_op_t *read_op, uint64_t &fulfille
}
cur_start = it->offset + it->len;
if (it == PRIV(read_op)->read_vec.end() || cur_start >= item_end)
{
break;
}
}
}
endwhile:
return 1;
}
uint8_t* blockstore_impl_t::get_clean_entry_bitmap(uint64_t block_loc, int offset)
{
uint8_t *clean_entry_bitmap;
uint64_t meta_loc = block_loc >> block_order;
if (inmemory_meta)
{
uint64_t sector = (meta_loc / (meta_block_size / clean_entry_size)) * meta_block_size;
uint64_t pos = (meta_loc % (meta_block_size / clean_entry_size));
clean_entry_bitmap = (uint8_t*)(metadata_buffer + sector + pos*clean_entry_size + sizeof(clean_disk_entry) + offset);
}
else
clean_entry_bitmap = (uint8_t*)(clean_bitmap + meta_loc*2*clean_entry_bitmap_size + offset);
return clean_entry_bitmap;
}
int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
{
auto clean_it = clean_db.find(read_op->oid);
@ -127,7 +93,7 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
read_op->version = 0;
read_op->retval = read_op->len;
FINISH_OP(read_op);
return 2;
return 1;
}
uint64_t fulfilled = 0;
PRIV(read_op)->pending_ops = 0;
@ -149,11 +115,6 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
if (!result_version)
{
result_version = dirty_it->first.version;
if (read_op->bitmap)
{
void *bmp_ptr = (clean_entry_bitmap_size > sizeof(void*) ? dirty_it->second.bitmap : &dirty_it->second.bitmap);
memcpy(read_op->bitmap, bmp_ptr, clean_entry_bitmap_size);
}
}
if (!fulfill_read(read_op, fulfilled, dirty.offset, dirty.offset + dirty.len,
dirty.state, dirty_it->first.version, dirty.location + (IS_JOURNAL(dirty.state) ? 0 : dirty.offset)))
@ -175,17 +136,12 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
if (!result_version)
{
result_version = clean_it->second.version;
if (read_op->bitmap)
{
void *bmp_ptr = get_clean_entry_bitmap(clean_it->second.location, clean_entry_bitmap_size);
memcpy(read_op->bitmap, bmp_ptr, clean_entry_bitmap_size);
}
}
if (fulfilled < read_op->len)
{
if (!clean_entry_bitmap_size)
{
if (!fulfill_read(read_op, fulfilled, 0, block_size, (BS_ST_BIG_WRITE | BS_ST_STABLE), 0, clean_it->second.location))
if (!fulfill_read(read_op, fulfilled, 0, block_size, ST_CURRENT, 0, clean_it->second.location))
{
// need to wait. undo added requests, don't dequeue op
PRIV(read_op)->read_vec.clear();
@ -194,7 +150,18 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
}
else
{
uint8_t *clean_entry_bitmap = get_clean_entry_bitmap(clean_it->second.location, 0);
uint64_t meta_loc = clean_it->second.location >> block_order;
uint8_t *clean_entry_bitmap;
if (inmemory_meta)
{
uint64_t sector = (meta_loc / (meta_block_size / clean_entry_size)) * meta_block_size;
uint64_t pos = (meta_loc % (meta_block_size / clean_entry_size));
clean_entry_bitmap = (uint8_t*)(metadata_buffer + sector + pos*clean_entry_size + sizeof(clean_disk_entry));
}
else
{
clean_entry_bitmap = (uint8_t*)(clean_bitmap + meta_loc*clean_entry_bitmap_size);
}
uint64_t bmp_start = 0, bmp_end = 0, bmp_size = block_size/bitmap_granularity;
while (bmp_start < bmp_size)
{
@ -205,8 +172,8 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
if (bmp_end > bmp_start)
{
// fill with zeroes
assert(fulfill_read(read_op, fulfilled, bmp_start * bitmap_granularity,
bmp_end * bitmap_granularity, (BS_ST_DELETE | BS_ST_STABLE), 0, 0));
fulfill_read(read_op, fulfilled, bmp_start * bitmap_granularity,
bmp_end * bitmap_granularity, ST_DEL_STABLE, 0, 0);
}
bmp_start = bmp_end;
while (clean_entry_bitmap[bmp_end >> 3] & (1 << (bmp_end & 0x7)) && bmp_end < bmp_size)
@ -216,8 +183,7 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
if (bmp_end > bmp_start)
{
if (!fulfill_read(read_op, fulfilled, bmp_start * bitmap_granularity,
bmp_end * bitmap_granularity, (BS_ST_BIG_WRITE | BS_ST_STABLE), 0,
clean_it->second.location + bmp_start * bitmap_granularity))
bmp_end * bitmap_granularity, ST_CURRENT, 0, clean_it->second.location + bmp_start * bitmap_granularity))
{
// need to wait. undo added requests, don't dequeue op
PRIV(read_op)->read_vec.clear();
@ -232,7 +198,7 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
else if (fulfilled < read_op->len)
{
// fill remaining parts with zeroes
assert(fulfill_read(read_op, fulfilled, 0, block_size, (BS_ST_DELETE | BS_ST_STABLE), 0, 0));
fulfill_read(read_op, fulfilled, 0, block_size, ST_DEL_STABLE, 0, 0);
}
assert(fulfilled == read_op->len);
read_op->version = result_version;
@ -246,10 +212,10 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
}
read_op->retval = read_op->len;
FINISH_OP(read_op);
return 2;
return 1;
}
read_op->retval = 0;
return 2;
return 1;
}
void blockstore_impl_t::handle_read_event(ring_data_t *data, blockstore_op_t *op)

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
int blockstore_impl_t::dequeue_rollback(blockstore_op_t *op)
@ -9,14 +6,10 @@ int blockstore_impl_t::dequeue_rollback(blockstore_op_t *op)
{
return continue_rollback(op);
}
obj_ver_id *v, *nv;
obj_ver_id* v;
int i, todo = op->len;
for (i = 0, v = (obj_ver_id*)op->buf, nv = (obj_ver_id*)op->buf; i < op->len; i++, v++, nv++)
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
if (nv != v)
{
*nv = *v;
}
// Check that there are some versions greater than v->version (which may be zero),
// check that they're unstable, synced, and not currently written to
auto dirty_it = dirty_db.lower_bound((obj_ver_id){
@ -25,32 +18,31 @@ int blockstore_impl_t::dequeue_rollback(blockstore_op_t *op)
});
if (dirty_it == dirty_db.begin())
{
skip_ov:
// Already rolled back, skip this object version
todo--;
nv--;
continue;
if (v->version == 0)
{
// Already rolled back
// FIXME Skip this object version
}
bad_op:
op->retval = -ENOENT;
FINISH_OP(op);
return 1;
}
else
{
dirty_it--;
if (dirty_it->first.oid != v->oid || dirty_it->first.version < v->version)
{
goto skip_ov;
goto bad_op;
}
while (dirty_it->first.oid == v->oid && dirty_it->first.version > v->version)
{
if (IS_IN_FLIGHT(dirty_it->second.state))
{
// Object write is still in progress. Wait until the write request completes
return 0;
}
else if (!IS_SYNCED(dirty_it->second.state) ||
if (!IS_SYNCED(dirty_it->second.state) ||
IS_STABLE(dirty_it->second.state))
{
op->retval = -EBUSY;
FINISH_OP(op);
return 2;
return 1;
}
if (dirty_it == dirty_db.begin())
{
@ -60,14 +52,6 @@ skip_ov:
}
}
}
op->len = todo;
if (!todo)
{
// Already rolled back
op->retval = 0;
FINISH_OP(op);
return 2;
}
// Check journal space
blockstore_journal_check_t space_check(this);
if (!space_check.check_available(op, todo, sizeof(journal_entry_rollback), 0))
@ -75,38 +59,70 @@ skip_ov:
return 0;
}
// There is sufficient space. Get SQEs
struct io_uring_sqe *sqe[space_check.sectors_to_write];
for (i = 0; i < space_check.sectors_to_write; i++)
struct io_uring_sqe *sqe[space_check.sectors_required];
for (i = 0; i < space_check.sectors_required; i++)
{
BS_SUBMIT_GET_SQE_DECL(sqe[i]);
}
// Prepare and submit journal entries
auto cb = [this, op](ring_data_t *data) { handle_rollback_event(data, op); };
int s = 0, cur_sector = -1;
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
if (!journal.entry_fits(sizeof(journal_entry_rollback)) &&
if ((journal_block_size - journal.in_sector_pos) < sizeof(journal_entry_rollback) &&
journal.sector_info[journal.cur_sector].dirty)
{
if (cur_sector == -1)
PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
cur_sector = journal.cur_sector;
prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
}
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
// FIXME This is here only for the purpose of tracking unstable_writes. Remove if not required
// FIXME ...aaaand this is similar to blockstore_init.cpp - maybe dedup it?
auto dirty_it = dirty_db.lower_bound((obj_ver_id){
.oid = v->oid,
.version = UINT64_MAX,
});
uint64_t max_unstable = 0;
while (dirty_it != dirty_db.begin())
{
dirty_it--;
if (dirty_it->first.oid != v->oid)
break;
else if (dirty_it->first.version <= v->version)
{
if (!IS_STABLE(dirty_it->second.state))
max_unstable = dirty_it->first.version;
break;
}
}
auto unstab_it = unstable_writes.find(v->oid);
if (unstab_it != unstable_writes.end())
{
if (max_unstable == 0)
unstable_writes.erase(unstab_it);
else
unstab_it->second = max_unstable;
}
journal_entry_rollback *je = (journal_entry_rollback*)
prefill_single_journal_entry(journal, JE_ROLLBACK, sizeof(journal_entry_rollback));
journal.sector_info[journal.cur_sector].dirty = false;
je->oid = v->oid;
je->version = v->version;
je->crc32 = je_crc32((journal_entry*)je);
journal.crc32_last = je->crc32;
}
prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
assert(s == space_check.sectors_to_write);
if (cur_sector != journal.cur_sector)
{
if (cur_sector == -1)
PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
cur_sector = journal.cur_sector;
prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
}
}
PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops = s;
PRIV(op)->op_state = 1;
inflight_writes++;
return 1;
}
@ -126,8 +142,11 @@ resume_2:
resume_3:
if (!disable_journal_fsync)
{
io_uring_sqe *sqe;
BS_SUBMIT_GET_SQE_DECL(sqe);
io_uring_sqe *sqe = get_sqe();
if (!sqe)
{
return 0;
}
ring_data_t *data = ((ring_data_t*)sqe->user_data);
my_uring_prep_fsync(sqe, journal.fd, IORING_FSYNC_DATASYNC);
data->iov = { 0 };
@ -142,58 +161,33 @@ resume_5:
int i;
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
mark_rolled_back(*v);
// Erase dirty_db entries
auto rm_end = dirty_db.lower_bound((obj_ver_id){
.oid = v->oid,
.version = UINT64_MAX,
});
auto rm_start = rm_end;
assert(rm_start != dirty_db.begin());
rm_start--;
while (1)
{
if (rm_start->first.oid != v->oid || rm_start->first.version <= v->version)
{
rm_start++;
break;
}
flusher->mark_trim_possible();
if (rm_start == dirty_db.begin())
break;
rm_start--;
}
erase_dirty(rm_start, rm_end, UINT64_MAX);
}
journal.trim();
inflight_writes--;
// Acknowledge op
op->retval = 0;
FINISH_OP(op);
return 2;
}
void blockstore_impl_t::mark_rolled_back(const obj_ver_id & ov)
{
auto it = dirty_db.lower_bound((obj_ver_id){
.oid = ov.oid,
.version = UINT64_MAX,
});
if (it != dirty_db.begin())
{
uint64_t max_unstable = 0;
auto rm_start = it;
auto rm_end = it;
it--;
while (1)
{
if (it->first.oid != ov.oid)
break;
else if (it->first.version <= ov.version)
{
if (!IS_STABLE(it->second.state))
max_unstable = it->first.version;
break;
}
else if (IS_IN_FLIGHT(it->second.state) || IS_STABLE(it->second.state))
break;
// Remove entry
rm_start = it;
if (it == dirty_db.begin())
break;
it--;
}
if (rm_start != rm_end)
{
erase_dirty(rm_start, rm_end, UINT64_MAX);
auto unstab_it = unstable_writes.find(ov.oid);
if (unstab_it != unstable_writes.end())
{
if (max_unstable == 0)
unstable_writes.erase(unstab_it);
else
unstab_it->second = max_unstable;
}
}
}
return 1;
}
void blockstore_impl_t::handle_rollback_event(ring_data_t *data, blockstore_op_t *op)
@ -201,6 +195,7 @@ void blockstore_impl_t::handle_rollback_event(ring_data_t *data, blockstore_op_t
live = true;
if (data->res != data->iov.iov_len)
{
inflight_writes--;
throw std::runtime_error(
"write operation failed ("+std::to_string(data->res)+" != "+std::to_string(data->iov.iov_len)+
"). in-memory state is corrupted. AAAAAAAaaaaaaaaa!!!111"
@ -210,44 +205,19 @@ void blockstore_impl_t::handle_rollback_event(ring_data_t *data, blockstore_op_t
if (PRIV(op)->pending_ops == 0)
{
PRIV(op)->op_state++;
ringloop->wakeup();
if (!continue_rollback(op))
{
submit_queue.push_front(op);
}
}
}
void blockstore_impl_t::erase_dirty(blockstore_dirty_db_t::iterator dirty_start, blockstore_dirty_db_t::iterator dirty_end, uint64_t clean_loc)
{
if (dirty_end == dirty_start)
{
return;
}
auto dirty_it = dirty_end;
while (dirty_it != dirty_start)
{
dirty_it--;
if (IS_DELETE(dirty_it->second.state))
{
object_id oid = dirty_it->first.oid;
#ifdef BLOCKSTORE_DEBUG
printf("Unblock writes-after-delete %lx:%lx v%lx\n", oid.inode, oid.stripe, dirty_it->first.version);
#endif
dirty_it = dirty_end;
// Unblock operations blocked by delete flushing
uint32_t next_state = BS_ST_IN_FLIGHT;
while (dirty_it != dirty_db.end() && dirty_it->first.oid == oid)
{
if ((dirty_it->second.state & BS_ST_WORKFLOW_MASK) == BS_ST_WAIT_DEL)
{
dirty_it->second.state = (dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | next_state;
if (IS_BIG_WRITE(dirty_it->second.state))
{
next_state = BS_ST_WAIT_BIG;
}
}
dirty_it++;
}
dirty_it = dirty_end;
dirty_it--;
}
while (1)
{
if (IS_BIG_WRITE(dirty_it->second.state) && dirty_it->second.location != clean_loc)
{
#ifdef BLOCKSTORE_DEBUG
@ -255,27 +225,15 @@ void blockstore_impl_t::erase_dirty(blockstore_dirty_db_t::iterator dirty_start,
#endif
data_alloc->set(dirty_it->second.location >> block_order, false);
}
int used = --journal.used_sectors[dirty_it->second.journal_sector];
#ifdef BLOCKSTORE_DEBUG
printf(
"remove usage of journal offset %08lx by %lx:%lx v%lu (%d refs)\n", dirty_it->second.journal_sector,
dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version, used
);
printf("remove usage of journal offset %lu by %lu:%lu v%lu\n", dirty_it->second.journal_sector,
dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version);
#endif
int used = --journal.used_sectors[dirty_it->second.journal_sector];
if (used == 0)
{
journal.used_sectors.erase(dirty_it->second.journal_sector);
}
if (clean_entry_bitmap_size > sizeof(void*))
{
free(dirty_it->second.bitmap);
dirty_it->second.bitmap = NULL;
}
if (dirty_it == dirty_start)
{
break;
}
dirty_it--;
}
dirty_db.erase(dirty_start, dirty_end);
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
// Stabilize small write:
@ -60,24 +57,19 @@ int blockstore_impl_t::dequeue_stable(blockstore_op_t *op)
// No such object version
op->retval = -ENOENT;
FINISH_OP(op);
return 2;
return 1;
}
else
{
// Already stable
}
}
else if (IS_IN_FLIGHT(dirty_it->second.state))
{
// Object write is still in progress. Wait until the write request completes
return 0;
}
else if (!IS_SYNCED(dirty_it->second.state))
else if (IS_UNSYNCED(dirty_it->second.state))
{
// Object not synced yet. Caller must sync it first
op->retval = -EBUSY;
FINISH_OP(op);
return 2;
return 1;
}
else if (!IS_STABLE(dirty_it->second.state))
{
@ -89,7 +81,7 @@ int blockstore_impl_t::dequeue_stable(blockstore_op_t *op)
// Already stable
op->retval = 0;
FINISH_OP(op);
return 2;
return 1;
}
// Check journal space
blockstore_journal_check_t space_check(this);
@ -98,39 +90,50 @@ int blockstore_impl_t::dequeue_stable(blockstore_op_t *op)
return 0;
}
// There is sufficient space. Get SQEs
struct io_uring_sqe *sqe[space_check.sectors_to_write];
for (i = 0; i < space_check.sectors_to_write; i++)
struct io_uring_sqe *sqe[space_check.sectors_required];
for (i = 0; i < space_check.sectors_required; i++)
{
BS_SUBMIT_GET_SQE_DECL(sqe[i]);
}
// Prepare and submit journal entries
auto cb = [this, op](ring_data_t *data) { handle_stable_event(data, op); };
int s = 0, cur_sector = -1;
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
// FIXME: Only stabilize versions that aren't stable yet
if (!journal.entry_fits(sizeof(journal_entry_stable)) &&
if ((journal_block_size - journal.in_sector_pos) < sizeof(journal_entry_stable) &&
journal.sector_info[journal.cur_sector].dirty)
{
if (cur_sector == -1)
PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
cur_sector = journal.cur_sector;
prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
}
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
// FIXME: Only stabilize versions that aren't stable yet
auto unstab_it = unstable_writes.find(v->oid);
if (unstab_it != unstable_writes.end() &&
unstab_it->second <= v->version)
{
unstable_writes.erase(unstab_it);
}
journal_entry_stable *je = (journal_entry_stable*)
prefill_single_journal_entry(journal, JE_STABLE, sizeof(journal_entry_stable));
journal.sector_info[journal.cur_sector].dirty = false;
je->oid = v->oid;
je->version = v->version;
je->crc32 = je_crc32((journal_entry*)je);
journal.crc32_last = je->crc32;
}
prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
assert(s == space_check.sectors_to_write);
if (cur_sector != journal.cur_sector)
{
if (cur_sector == -1)
PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
cur_sector = journal.cur_sector;
prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
}
}
PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops = s;
PRIV(op)->op_state = 1;
inflight_writes++;
return 1;
}
@ -150,8 +153,16 @@ resume_2:
resume_3:
if (!disable_journal_fsync)
{
io_uring_sqe *sqe;
BS_SUBMIT_GET_SQE_DECL(sqe);
{
timespec now;
clock_gettime(CLOCK_REALTIME, &now);
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
}
io_uring_sqe *sqe = get_sqe();
if (!sqe)
{
return 0;
}
ring_data_t *data = ((ring_data_t*)sqe->user_data);
my_uring_prep_fsync(sqe, journal.fd, IORING_FSYNC_DATASYNC);
data->iov = { 0 };
@ -168,33 +179,22 @@ resume_5:
for (i = 0, v = (obj_ver_id*)op->buf; i < op->len; i++, v++)
{
// Mark all dirty_db entries up to op->version as stable
mark_stable(*v);
}
// Acknowledge op
op->retval = 0;
FINISH_OP(op);
return 2;
}
void blockstore_impl_t::mark_stable(const obj_ver_id & v)
{
auto dirty_it = dirty_db.find(v);
auto dirty_it = dirty_db.find(*v);
if (dirty_it != dirty_db.end())
{
while (1)
{
if ((dirty_it->second.state & BS_ST_WORKFLOW_MASK) == BS_ST_SYNCED)
if (dirty_it->second.state == ST_J_SYNCED)
{
dirty_it->second.state = (dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | BS_ST_STABLE;
// Allocations and deletions are counted when they're stabilized
if (IS_BIG_WRITE(dirty_it->second.state))
{
inode_space_stats[dirty_it->first.oid.inode] += block_size;
dirty_it->second.state = ST_J_STABLE;
}
else if (IS_DELETE(dirty_it->second.state))
else if (dirty_it->second.state == ST_D_SYNCED)
{
inode_space_stats[dirty_it->first.oid.inode] -= block_size;
dirty_it->second.state = ST_D_STABLE;
}
else if (dirty_it->second.state == ST_DEL_SYNCED)
{
dirty_it->second.state = ST_DEL_STABLE;
}
else if (IS_STABLE(dirty_it->second.state))
{
@ -205,19 +205,22 @@ void blockstore_impl_t::mark_stable(const obj_ver_id & v)
break;
}
dirty_it--;
if (dirty_it->first.oid != v.oid)
if (dirty_it->first.oid != v->oid)
{
break;
}
}
flusher->enqueue_flush(v);
#ifdef BLOCKSTORE_DEBUG
printf("enqueue_flush %lu:%lu v%lu\n", v->oid.inode, v->oid.stripe, v->version);
#endif
flusher->enqueue_flush(*v);
}
auto unstab_it = unstable_writes.find(v.oid);
if (unstab_it != unstable_writes.end() &&
unstab_it->second <= v.version)
{
unstable_writes.erase(unstab_it);
}
inflight_writes--;
// Acknowledge op
op->retval = 0;
FINISH_OP(op);
return 1;
}
void blockstore_impl_t::handle_stable_event(ring_data_t *data, blockstore_op_t *op)
@ -225,6 +228,7 @@ void blockstore_impl_t::handle_stable_event(ring_data_t *data, blockstore_op_t *
live = true;
if (data->res != data->iov.iov_len)
{
inflight_writes--;
throw std::runtime_error(
"write operation failed ("+std::to_string(data->res)+" != "+std::to_string(data->iov.iov_len)+
"). in-memory state is corrupted. AAAAAAAaaaaaaaaa!!!111"
@ -234,6 +238,9 @@ void blockstore_impl_t::handle_stable_event(ring_data_t *data, blockstore_op_t *
if (PRIV(op)->pending_ops == 0)
{
PRIV(op)->op_state++;
ringloop->wakeup();
if (!continue_stable(op))
{
submit_queue.push_front(op);
}
}
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
#define SYNC_HAS_SMALL 1
@ -12,15 +9,8 @@
#define SYNC_JOURNAL_SYNC_SENT 7
#define SYNC_DONE 8
int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_progress_sync)
int blockstore_impl_t::dequeue_sync(blockstore_op_t *op)
{
if (immediate_commit == IMMEDIATE_ALL)
{
// We can return immediately because sync is only dequeued after all previous writes
op->retval = 0;
FINISH_OP(op);
return 2;
}
if (PRIV(op)->op_state == 0)
{
stop_sync_submitted = false;
@ -36,15 +26,34 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
PRIV(op)->op_state = SYNC_HAS_SMALL;
else
PRIV(op)->op_state = SYNC_DONE;
// Always add sync to in_progress_syncs because we clear unsynced_big_writes and unsynced_small_writes
PRIV(op)->prev_sync_count = in_progress_syncs.size();
PRIV(op)->in_progress_ptr = in_progress_syncs.insert(in_progress_syncs.end(), op);
}
continue_sync(op);
// Always dequeue because we always add syncs to in_progress_syncs
return 1;
}
int blockstore_impl_t::continue_sync(blockstore_op_t *op)
{
auto cb = [this, op](ring_data_t *data) { handle_sync_event(data, op); };
if (PRIV(op)->op_state == SYNC_HAS_SMALL)
{
// No big writes, just fsync the journal
for (; PRIV(op)->sync_small_checked < PRIV(op)->sync_small_writes.size(); PRIV(op)->sync_small_checked++)
{
if (IS_IN_FLIGHT(dirty_db[PRIV(op)->sync_small_writes[PRIV(op)->sync_small_checked]].state))
{
// Wait for small inflight writes to complete
return 0;
}
}
if (journal.sector_info[journal.cur_sector].dirty)
{
// Write out the last journal sector if it happens to be dirty
BS_SUBMIT_GET_ONLY_SQE(sqe);
prepare_journal_sector_write(journal, journal.cur_sector, sqe, [this, op](ring_data_t *data) { handle_sync_event(data, op); });
prepare_journal_sector_write(journal, journal.cur_sector, sqe, cb);
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops = 1;
PRIV(op)->op_state = SYNC_JOURNAL_WRITE_SENT;
@ -57,13 +66,21 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
}
if (PRIV(op)->op_state == SYNC_HAS_BIG)
{
for (; PRIV(op)->sync_big_checked < PRIV(op)->sync_big_writes.size(); PRIV(op)->sync_big_checked++)
{
if (IS_IN_FLIGHT(dirty_db[PRIV(op)->sync_big_writes[PRIV(op)->sync_big_checked]].state))
{
// Wait for big inflight writes to complete
return 0;
}
}
// 1st step: fsync data
if (!disable_data_fsync)
{
BS_SUBMIT_GET_SQE(sqe, data);
my_uring_prep_fsync(sqe, data_fd, IORING_FSYNC_DATASYNC);
data->iov = { 0 };
data->callback = [this, op](ring_data_t *data) { handle_sync_event(data, op); };
data->callback = cb;
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 0;
PRIV(op)->pending_ops = 1;
PRIV(op)->op_state = SYNC_DATA_SYNC_SENT;
@ -76,44 +93,47 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
}
if (PRIV(op)->op_state == SYNC_DATA_SYNC_DONE)
{
for (; PRIV(op)->sync_small_checked < PRIV(op)->sync_small_writes.size(); PRIV(op)->sync_small_checked++)
{
if (IS_IN_FLIGHT(dirty_db[PRIV(op)->sync_small_writes[PRIV(op)->sync_small_checked]].state))
{
// Wait for small inflight writes to complete
return 0;
}
}
// 2nd step: Data device is synced, prepare & write journal entries
// Check space in the journal and journal memory buffers
blockstore_journal_check_t space_check(this);
if (!space_check.check_available(op, PRIV(op)->sync_big_writes.size(), sizeof(journal_entry_big_write), JOURNAL_STABILIZE_RESERVATION))
if (!space_check.check_available(op, PRIV(op)->sync_big_writes.size(), sizeof(journal_entry_big_write), 0))
{
return 0;
}
// Get SQEs. Don't bother about merging, submit each journal sector as a separate request
struct io_uring_sqe *sqe[space_check.sectors_to_write];
for (int i = 0; i < space_check.sectors_to_write; i++)
struct io_uring_sqe *sqe[space_check.sectors_required];
for (int i = 0; i < space_check.sectors_required; i++)
{
BS_SUBMIT_GET_SQE_DECL(sqe[i]);
}
// Prepare and submit journal entries
auto it = PRIV(op)->sync_big_writes.begin();
int s = 0, cur_sector = -1;
while (it != PRIV(op)->sync_big_writes.end())
{
if (!journal.entry_fits(sizeof(journal_entry_big_write)) &&
if ((journal_block_size - journal.in_sector_pos) < sizeof(journal_entry_big_write) &&
journal.sector_info[journal.cur_sector].dirty)
{
if (cur_sector == -1)
PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], [this, op](ring_data_t *data) { handle_sync_event(data, op); });
cur_sector = journal.cur_sector;
prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
}
journal_entry_big_write *je = (journal_entry_big_write*)prefill_single_journal_entry(
journal, (dirty_db[*it].state & BS_ST_INSTANT) ? JE_BIG_WRITE_INSTANT : JE_BIG_WRITE,
sizeof(journal_entry_big_write)
);
while (it != PRIV(op)->sync_big_writes.end())
{
journal_entry_big_write *je = (journal_entry_big_write*)
prefill_single_journal_entry(journal, JE_BIG_WRITE, sizeof(journal_entry_big_write));
dirty_db[*it].journal_sector = journal.sector_info[journal.cur_sector].offset;
journal.sector_info[journal.cur_sector].dirty = false;
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
#ifdef BLOCKSTORE_DEBUG
printf(
"journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
dirty_db[*it].journal_sector, it->oid.inode, it->oid.stripe, it->version,
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
);
printf("journal offset %lu is used by %lu:%lu v%lu\n", dirty_db[*it].journal_sector, it->oid.inode, it->oid.stripe, it->version);
#endif
je->oid = it->oid;
je->version = it->version;
@ -123,11 +143,14 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
je->crc32 = je_crc32((journal_entry*)je);
journal.crc32_last = je->crc32;
it++;
}
prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], [this, op](ring_data_t *data) { handle_sync_event(data, op); });
assert(s == space_check.sectors_to_write);
if (cur_sector != journal.cur_sector)
{
if (cur_sector == -1)
PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
cur_sector = journal.cur_sector;
prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
}
}
PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops = s;
PRIV(op)->op_state = SYNC_JOURNAL_WRITE_SENT;
@ -140,7 +163,7 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
BS_SUBMIT_GET_SQE(sqe, data);
my_uring_prep_fsync(sqe, journal.fd, IORING_FSYNC_DATASYNC);
data->iov = { 0 };
data->callback = [this, op](ring_data_t *data) { handle_sync_event(data, op); };
data->callback = cb;
PRIV(op)->pending_ops = 1;
PRIV(op)->op_state = SYNC_JOURNAL_SYNC_SENT;
return 1;
@ -150,10 +173,9 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op, bool queue_has_in_prog
PRIV(op)->op_state = SYNC_DONE;
}
}
if (PRIV(op)->op_state == SYNC_DONE && !queue_has_in_progress_sync)
if (PRIV(op)->op_state == SYNC_DONE)
{
ack_sync(op);
return 2;
return ack_sync(op);
}
return 1;
}
@ -185,37 +207,59 @@ void blockstore_impl_t::handle_sync_event(ring_data_t *data, blockstore_op_t *op
else if (PRIV(op)->op_state == SYNC_JOURNAL_SYNC_SENT)
{
PRIV(op)->op_state = SYNC_DONE;
ack_sync(op);
}
else
{
throw std::runtime_error("BUG: unexpected sync op state");
}
ringloop->wakeup();
}
}
void blockstore_impl_t::ack_sync(blockstore_op_t *op)
int blockstore_impl_t::ack_sync(blockstore_op_t *op)
{
if (PRIV(op)->op_state == SYNC_DONE && PRIV(op)->prev_sync_count == 0)
{
// Remove dependency of subsequent syncs
auto it = PRIV(op)->in_progress_ptr;
int done_syncs = 1;
++it;
// Acknowledge sync
ack_one_sync(op);
while (it != in_progress_syncs.end())
{
auto & next_sync = *it++;
PRIV(next_sync)->prev_sync_count -= done_syncs;
if (PRIV(next_sync)->prev_sync_count == 0 && PRIV(next_sync)->op_state == SYNC_DONE)
{
done_syncs++;
// Acknowledge next_sync
ack_one_sync(next_sync);
}
}
return 2;
}
return 0;
}
void blockstore_impl_t::ack_one_sync(blockstore_op_t *op)
{
// Handle states
for (auto it = PRIV(op)->sync_big_writes.begin(); it != PRIV(op)->sync_big_writes.end(); it++)
{
#ifdef BLOCKSTORE_DEBUG
printf("Ack sync big %lx:%lx v%lu\n", it->oid.inode, it->oid.stripe, it->version);
printf("Ack sync big %lu:%lu v%lu\n", it->oid.inode, it->oid.stripe, it->version);
#endif
auto & unstab = unstable_writes[it->oid];
unstab = unstab < it->version ? it->version : unstab;
auto dirty_it = dirty_db.find(*it);
dirty_it->second.state = ((dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | BS_ST_SYNCED);
if (dirty_it->second.state & BS_ST_INSTANT)
{
mark_stable(dirty_it->first);
}
dirty_it->second.state = ST_D_SYNCED;
dirty_it++;
while (dirty_it != dirty_db.end() && dirty_it->first.oid == it->oid)
{
if ((dirty_it->second.state & BS_ST_WORKFLOW_MASK) == BS_ST_WAIT_BIG)
if (dirty_it->second.state == ST_J_WAIT_BIG)
{
dirty_it->second.state = (dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | BS_ST_IN_FLIGHT;
dirty_it->second.state = ST_J_IN_FLIGHT;
}
dirty_it++;
}
@ -223,25 +267,13 @@ void blockstore_impl_t::ack_sync(blockstore_op_t *op)
for (auto it = PRIV(op)->sync_small_writes.begin(); it != PRIV(op)->sync_small_writes.end(); it++)
{
#ifdef BLOCKSTORE_DEBUG
printf("Ack sync small %lx:%lx v%lu\n", it->oid.inode, it->oid.stripe, it->version);
printf("Ack sync small %lu:%lu v%lu\n", it->oid.inode, it->oid.stripe, it->version);
#endif
auto & unstab = unstable_writes[it->oid];
unstab = unstab < it->version ? it->version : unstab;
if (dirty_db[*it].state == (BS_ST_DELETE | BS_ST_WRITTEN))
{
dirty_db[*it].state = (BS_ST_DELETE | BS_ST_SYNCED);
// Deletions are treated as immediately stable
mark_stable(*it);
}
else /* (BS_ST_INSTANT?) | BS_ST_SMALL_WRITE | BS_ST_WRITTEN */
{
dirty_db[*it].state = (dirty_db[*it].state & ~BS_ST_WORKFLOW_MASK) | BS_ST_SYNCED;
if (dirty_db[*it].state & BS_ST_INSTANT)
{
mark_stable(*it);
}
}
dirty_db[*it].state = dirty_db[*it].state == ST_DEL_WRITTEN ? ST_DEL_SYNCED : ST_J_SYNCED;
}
in_progress_syncs.erase(PRIV(op)->in_progress_ptr);
op->retval = 0;
FINISH_OP(op);
}

View File

@ -1,19 +1,11 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "blockstore_impl.h"
bool blockstore_impl_t::enqueue_write(blockstore_op_t *op)
{
// Check or assign version number
bool found = false, deleted = false, is_del = (op->opcode == BS_OP_DELETE);
bool wait_big = false, wait_del = false;
void *bmp = NULL;
bool is_inflight_big = false;
uint64_t version = 1;
if (!is_del && clean_entry_bitmap_size > sizeof(void*))
{
bmp = calloc_or_die(1, clean_entry_bitmap_size);
}
if (dirty_db.size() > 0)
{
auto dirty_it = dirty_db.upper_bound((obj_ver_id){
@ -26,14 +18,9 @@ bool blockstore_impl_t::enqueue_write(blockstore_op_t *op)
found = true;
version = dirty_it->first.version + 1;
deleted = IS_DELETE(dirty_it->second.state);
wait_del = ((dirty_it->second.state & BS_ST_WORKFLOW_MASK) == BS_ST_WAIT_DEL);
wait_big = (dirty_it->second.state & BS_ST_TYPE_MASK) == BS_ST_BIG_WRITE
? !IS_SYNCED(dirty_it->second.state)
: ((dirty_it->second.state & BS_ST_WORKFLOW_MASK) == BS_ST_WAIT_BIG);
if (clean_entry_bitmap_size > sizeof(void*))
memcpy(bmp, dirty_it->second.bitmap, clean_entry_bitmap_size);
else
bmp = dirty_it->second.bitmap;
is_inflight_big = dirty_it->second.state >= ST_D_IN_FLIGHT &&
dirty_it->second.state < ST_D_SYNCED ||
dirty_it->second.state == ST_J_WAIT_BIG;
}
}
if (!found)
@ -42,55 +29,29 @@ bool blockstore_impl_t::enqueue_write(blockstore_op_t *op)
if (clean_it != clean_db.end())
{
version = clean_it->second.version + 1;
void *bmp_ptr = get_clean_entry_bitmap(clean_it->second.location, clean_entry_bitmap_size);
memcpy((clean_entry_bitmap_size > sizeof(void*) ? bmp : &bmp), bmp_ptr, clean_entry_bitmap_size);
}
else
{
deleted = true;
}
}
if (op->version == 0)
{
op->version = version;
}
else if (op->version < version)
{
// Invalid version requested
op->retval = -EEXIST;
return false;
}
if (deleted && is_del)
{
// Already deleted
op->retval = 0;
return false;
}
PRIV(op)->real_version = 0;
if (op->version == 0)
{
op->version = version;
}
else if (op->version < version)
{
// Implicit operations must be added like that: DEL [FLUSH] BIG [SYNC] SMALL SMALL
if (deleted || wait_del)
{
// It's allowed to write versions with low numbers over deletes
// However, we have to flush those deletes first as we use version number for ordering
#ifdef BLOCKSTORE_DEBUG
printf("Write %lx:%lx v%lu over delete (real v%lu) offset=%u len=%u\n", op->oid.inode, op->oid.stripe, version, op->version, op->offset, op->len);
#endif
wait_del = true;
PRIV(op)->real_version = op->version;
op->version = version;
flusher->unshift_flush((obj_ver_id){
.oid = op->oid,
.version = version-1,
}, true);
}
else
{
// Invalid version requested
op->retval = -EEXIST;
if (!is_del && clean_entry_bitmap_size > sizeof(void*))
{
free(bmp);
}
return false;
}
}
if (wait_big && !is_del && !deleted && op->len < block_size &&
if (is_inflight_big && !is_del && !deleted && op->len < block_size &&
immediate_commit != IMMEDIATE_ALL)
{
// Issue an additional sync so that the previous big write can reach the journal
@ -104,89 +65,30 @@ bool blockstore_impl_t::enqueue_write(blockstore_op_t *op)
}
#ifdef BLOCKSTORE_DEBUG
if (is_del)
printf("Delete %lx:%lx v%lu\n", op->oid.inode, op->oid.stripe, op->version);
else if (!wait_del)
printf("Write %lx:%lx v%lu offset=%u len=%u\n", op->oid.inode, op->oid.stripe, op->version, op->offset, op->len);
printf("Delete %lu:%lu v%lu\n", op->oid.inode, op->oid.stripe, op->version);
else
printf("Write %lu:%lu v%lu offset=%u len=%u\n", op->oid.inode, op->oid.stripe, op->version, op->offset, op->len);
#endif
// FIXME No strict need to add it into dirty_db here, it's just left
// No strict need to add it into dirty_db here, it's just left
// from the previous implementation where reads waited for writes
uint32_t state;
if (is_del)
state = BS_ST_DELETE | BS_ST_IN_FLIGHT;
else
{
state = (op->len == block_size || deleted ? BS_ST_BIG_WRITE : BS_ST_SMALL_WRITE);
if (wait_del)
state |= BS_ST_WAIT_DEL;
else if (state == BS_ST_SMALL_WRITE && wait_big)
state |= BS_ST_WAIT_BIG;
else
state |= BS_ST_IN_FLIGHT;
if (op->opcode == BS_OP_WRITE_STABLE)
state |= BS_ST_INSTANT;
if (op->bitmap)
{
// Only allow to overwrite part of the object bitmap respective to the write's offset/len
uint8_t *bmp_ptr = (uint8_t*)(clean_entry_bitmap_size > sizeof(void*) ? bmp : &bmp);
uint32_t bit = op->offset/bitmap_granularity;
uint32_t bits_left = op->len/bitmap_granularity;
while (!(bit % 8) && bits_left > 8)
{
// Copy bytes
bmp_ptr[bit/8] = ((uint8_t*)op->bitmap)[bit/8];
bit += 8;
bits_left -= 8;
}
while (bits_left > 0)
{
// Copy bits
bmp_ptr[bit/8] = (bmp_ptr[bit/8] & ~(1 << (bit%8)))
| (((uint8_t*)op->bitmap)[bit/8] & (1 << bit%8));
bit++;
bits_left--;
}
}
}
dirty_db.emplace((obj_ver_id){
.oid = op->oid,
.version = op->version,
}, (dirty_entry){
.state = state,
.state = (uint32_t)(
is_del
? ST_DEL_IN_FLIGHT
: (op->len == block_size || deleted ? ST_D_IN_FLIGHT : (is_inflight_big ? ST_J_WAIT_BIG : ST_J_IN_FLIGHT))
),
.flags = 0,
.location = 0,
.offset = is_del ? 0 : op->offset,
.len = is_del ? 0 : op->len,
.journal_sector = 0,
.bitmap = bmp,
});
return true;
}
void blockstore_impl_t::cancel_all_writes(blockstore_op_t *op, blockstore_dirty_db_t::iterator dirty_it, int retval)
{
while (dirty_it != dirty_db.end() && dirty_it->first.oid == op->oid)
{
if (clean_entry_bitmap_size > sizeof(void*))
free(dirty_it->second.bitmap);
dirty_db.erase(dirty_it++);
}
bool found = false;
for (auto other_op: submit_queue)
{
if (!found && other_op == op)
found = true;
else if (found && other_op->oid == op->oid &&
(other_op->opcode == BS_OP_WRITE || other_op->opcode == BS_OP_WRITE_STABLE))
{
// Mark operations to cancel them
PRIV(other_op)->real_version = UINT64_MAX;
other_op->retval = retval;
}
}
op->retval = retval;
FINISH_OP(op);
}
// First step of the write algorithm: dequeue operation and submit initial write(s)
int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
{
@ -198,47 +100,11 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
.oid = op->oid,
.version = op->version,
});
assert(dirty_it != dirty_db.end());
if ((dirty_it->second.state & BS_ST_WORKFLOW_MASK) < BS_ST_IN_FLIGHT)
{
// Don't dequeue
return 0;
}
if (PRIV(op)->real_version != 0)
{
if (PRIV(op)->real_version == UINT64_MAX)
{
// This is the flag value used to cancel operations
FINISH_OP(op);
return 2;
}
// Restore original low version number for unblocked operations
#ifdef BLOCKSTORE_DEBUG
printf("Restoring %lx:%lx version: v%lu -> v%lu\n", op->oid.inode, op->oid.stripe, op->version, PRIV(op)->real_version);
#endif
auto prev_it = dirty_it;
prev_it--;
if (prev_it->first.oid == op->oid && prev_it->first.version >= PRIV(op)->real_version)
{
// Original version is still invalid
// All subsequent writes to the same object must be canceled too
cancel_all_writes(op, dirty_it, -EEXIST);
return 2;
}
op->version = PRIV(op)->real_version;
PRIV(op)->real_version = 0;
dirty_entry e = dirty_it->second;
dirty_db.erase(dirty_it);
dirty_it = dirty_db.emplace((obj_ver_id){
.oid = op->oid,
.version = op->version,
}, e).first;
}
if (write_iodepth >= max_write_iodepth)
if (dirty_it->second.state == ST_J_WAIT_BIG)
{
return 0;
}
if ((dirty_it->second.state & BS_ST_TYPE_MASK) == BS_ST_BIG_WRITE)
else if (dirty_it->second.state == ST_D_IN_FLIGHT)
{
blockstore_journal_check_t space_check(this);
if (!space_check.check_available(op, unsynced_big_writes.size() + 1, sizeof(journal_entry_big_write), JOURNAL_STABILIZE_RESERVATION))
@ -256,13 +122,13 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
PRIV(op)->wait_for = WAIT_FREE;
return 0;
}
cancel_all_writes(op, dirty_it, -ENOSPC);
return 2;
op->retval = -ENOSPC;
FINISH_OP(op);
return 1;
}
write_iodepth++;
BS_SUBMIT_GET_SQE(sqe, data);
dirty_it->second.location = loc << block_order;
dirty_it->second.state = (dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | BS_ST_SUBMITTED;
dirty_it->second.state = ST_D_SUBMITTED;
#ifdef BLOCKSTORE_DEBUG
printf("Allocate block %lu\n", loc);
#endif
@ -302,7 +168,7 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
PRIV(op)->op_state = 1;
}
}
else /* if ((dirty_it->second.state & BS_ST_TYPE_MASK) == BS_ST_SMALL_WRITE) */
else
{
// Small (journaled) write
// First check if the journal has sufficient space
@ -312,7 +178,6 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
{
return 0;
}
write_iodepth++;
// There is sufficient space. Get SQE(s)
struct io_uring_sqe *sqe1 = NULL;
if (immediate_commit != IMMEDIATE_NONE ||
@ -343,18 +208,12 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
}
}
// Then pre-fill journal entry
journal_entry_small_write *je = (journal_entry_small_write*)prefill_single_journal_entry(
journal, op->opcode == BS_OP_WRITE_STABLE ? JE_SMALL_WRITE_INSTANT : JE_SMALL_WRITE,
sizeof(journal_entry_small_write) + clean_entry_bitmap_size
);
journal_entry_small_write *je = (journal_entry_small_write*)
prefill_single_journal_entry(journal, JE_SMALL_WRITE, sizeof(journal_entry_small_write));
dirty_it->second.journal_sector = journal.sector_info[journal.cur_sector].offset;
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
#ifdef BLOCKSTORE_DEBUG
printf(
"journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version,
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
);
printf("journal offset %lu is used by %lu:%lu v%lu\n", dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version);
#endif
// Figure out where data will be
journal.next_free = (journal.next_free + op->len) <= journal.len ? journal.next_free : journal_block_size;
@ -364,7 +223,6 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
je->len = op->len;
je->data_offset = journal.next_free;
je->crc32_data = crc32c(0, op->buf, op->len);
memcpy((void*)(je+1), (clean_entry_bitmap_size > sizeof(void*) ? dirty_it->second.bitmap : &dirty_it->second.bitmap), clean_entry_bitmap_size);
je->crc32 = je_crc32((journal_entry*)je);
journal.crc32_last = je->crc32;
if (immediate_commit != IMMEDIATE_NONE)
@ -394,7 +252,7 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
// Zero-length overwrite. Allowed to bump object version in EC placement groups without actually writing data
}
dirty_it->second.location = journal.next_free;
dirty_it->second.state = (dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | BS_ST_SUBMITTED;
dirty_it->second.state = ST_J_SUBMITTED;
journal.next_free += op->len;
if (journal.next_free >= journal.len)
{
@ -411,13 +269,14 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
if (!PRIV(op)->pending_ops)
{
PRIV(op)->op_state = 4;
return continue_write(op);
continue_write(op);
}
else
{
PRIV(op)->op_state = 3;
}
}
inflight_writes++;
return 1;
}
@ -425,43 +284,40 @@ int blockstore_impl_t::continue_write(blockstore_op_t *op)
{
io_uring_sqe *sqe = NULL;
journal_entry_big_write *je;
int op_state = PRIV(op)->op_state;
if (op_state != 2 && op_state != 4)
{
// In progress
return 1;
}
auto dirty_it = dirty_db.find((obj_ver_id){
.oid = op->oid,
.version = op->version,
});
assert(dirty_it != dirty_db.end());
if (op_state == 2)
if (PRIV(op)->op_state == 2)
goto resume_2;
else if (op_state == 4)
else if (PRIV(op)->op_state == 4)
goto resume_4;
else
return 1;
resume_2:
// Only for the immediate_commit mode: prepare and submit big_write journal entry
BS_SUBMIT_GET_SQE_DECL(sqe);
je = (journal_entry_big_write*)prefill_single_journal_entry(
journal, op->opcode == BS_OP_WRITE_STABLE ? JE_BIG_WRITE_INSTANT : JE_BIG_WRITE,
sizeof(journal_entry_big_write) + clean_entry_bitmap_size
);
{
timespec now;
clock_gettime(CLOCK_REALTIME, &now);
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
}
sqe = get_sqe();
if (!sqe)
{
return 0;
}
je = (journal_entry_big_write*)prefill_single_journal_entry(journal, JE_BIG_WRITE, sizeof(journal_entry_big_write));
dirty_it->second.journal_sector = journal.sector_info[journal.cur_sector].offset;
journal.sector_info[journal.cur_sector].dirty = false;
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
#ifdef BLOCKSTORE_DEBUG
printf(
"journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
journal.sector_info[journal.cur_sector].offset, op->oid.inode, op->oid.stripe, op->version,
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
);
printf("journal offset %lu is used by %lu:%lu v%lu\n", journal.sector_info[journal.cur_sector].offset, op->oid.inode, op->oid.stripe, op->version);
#endif
je->oid = op->oid;
je->version = op->version;
je->offset = op->offset;
je->len = op->len;
je->location = dirty_it->second.location;
memcpy((void*)(je+1), (clean_entry_bitmap_size > sizeof(void*) ? dirty_it->second.bitmap : &dirty_it->second.bitmap), clean_entry_bitmap_size);
je->crc32 = je_crc32((journal_entry*)je);
journal.crc32_last = je->crc32;
prepare_journal_sector_write(journal, journal.cur_sector, sqe,
@ -472,10 +328,15 @@ resume_2:
return 1;
resume_4:
// Switch object state
{
timespec now;
clock_gettime(CLOCK_REALTIME, &now);
printf("write_done %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
}
#ifdef BLOCKSTORE_DEBUG
printf("Ack write %lx:%lx v%lu = state %x\n", op->oid.inode, op->oid.stripe, op->version, dirty_it->second.state);
printf("Ack write %lu:%lu v%lu = %d\n", op->oid.inode, op->oid.stripe, op->version, dirty_it->second.state);
#endif
bool imm = (dirty_it->second.state & BS_ST_TYPE_MASK) == BS_ST_BIG_WRITE
bool imm = dirty_it->second.state == ST_D_SUBMITTED
? (immediate_commit == IMMEDIATE_ALL)
: (immediate_commit != IMMEDIATE_NONE);
if (imm)
@ -483,30 +344,35 @@ resume_4:
auto & unstab = unstable_writes[op->oid];
unstab = unstab < op->version ? op->version : unstab;
}
dirty_it->second.state = (dirty_it->second.state & ~BS_ST_WORKFLOW_MASK)
| (imm ? BS_ST_SYNCED : BS_ST_WRITTEN);
if (imm && ((dirty_it->second.state & BS_ST_TYPE_MASK) == BS_ST_DELETE || (dirty_it->second.state & BS_ST_INSTANT)))
if (dirty_it->second.state == ST_J_SUBMITTED)
{
// Deletions are treated as immediately stable
mark_stable(dirty_it->first);
dirty_it->second.state = imm ? ST_J_SYNCED : ST_J_WRITTEN;
}
else if (dirty_it->second.state == ST_D_SUBMITTED)
{
dirty_it->second.state = imm ? ST_D_SYNCED : ST_D_WRITTEN;
}
else if (dirty_it->second.state == ST_DEL_SUBMITTED)
{
dirty_it->second.state = imm ? ST_DEL_SYNCED : ST_DEL_WRITTEN;
}
if (immediate_commit == IMMEDIATE_ALL)
{
dirty_it++;
while (dirty_it != dirty_db.end() && dirty_it->first.oid == op->oid)
{
if ((dirty_it->second.state & BS_ST_WORKFLOW_MASK) == BS_ST_WAIT_BIG)
if (dirty_it->second.state == ST_J_WAIT_BIG)
{
dirty_it->second.state = (dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | BS_ST_IN_FLIGHT;
dirty_it->second.state = ST_J_IN_FLIGHT;
}
dirty_it++;
}
}
inflight_writes--;
// Acknowledge write
op->retval = op->len;
write_iodepth--;
FINISH_OP(op);
return 2;
return 1;
}
void blockstore_impl_t::handle_write_event(ring_data_t *data, blockstore_op_t *op)
@ -514,6 +380,7 @@ void blockstore_impl_t::handle_write_event(ring_data_t *data, blockstore_op_t *o
live = true;
if (data->res != data->iov.iov_len)
{
inflight_writes--;
// FIXME: our state becomes corrupted after a write error. maybe do something better than just die
throw std::runtime_error(
"write operation failed ("+std::to_string(data->res)+" != "+std::to_string(data->iov.iov_len)+
@ -525,7 +392,10 @@ void blockstore_impl_t::handle_write_event(ring_data_t *data, blockstore_op_t *o
{
release_journal_sectors(op);
PRIV(op)->op_state++;
ringloop->wakeup();
if (!continue_write(op))
{
submit_queue.push_front(op);
}
}
}
@ -538,15 +408,11 @@ void blockstore_impl_t::release_journal_sectors(blockstore_op_t *op)
uint64_t s = PRIV(op)->min_flushed_journal_sector;
while (1)
{
journal.sector_info[s-1].flush_count--;
if (s != (1+journal.cur_sector) && journal.sector_info[s-1].flush_count == 0)
journal.sector_info[s-1].usage_count--;
if (s != (1+journal.cur_sector) && journal.sector_info[s-1].usage_count == 0)
{
// We know for sure that we won't write into this sector anymore
uint64_t new_ds = journal.sector_info[s-1].offset + journal.block_size;
if (new_ds >= journal.len)
{
new_ds = journal.block_size;
}
if ((journal.dirty_start + (journal.dirty_start >= journal.used_start ? 0 : journal.len)) <
(new_ds + (new_ds >= journal.used_start ? 0 : journal.len)))
{
@ -563,21 +429,15 @@ void blockstore_impl_t::release_journal_sectors(blockstore_op_t *op)
int blockstore_impl_t::dequeue_del(blockstore_op_t *op)
{
if (PRIV(op)->op_state)
{
return continue_write(op);
}
auto dirty_it = dirty_db.find((obj_ver_id){
.oid = op->oid,
.version = op->version,
});
assert(dirty_it != dirty_db.end());
blockstore_journal_check_t space_check(this);
if (!space_check.check_available(op, 1, sizeof(journal_entry_del), JOURNAL_STABILIZE_RESERVATION))
if (!space_check.check_available(op, 1, sizeof(journal_entry_del), 0))
{
return 0;
}
write_iodepth++;
io_uring_sqe *sqe = NULL;
if (immediate_commit != IMMEDIATE_NONE ||
(journal_block_size - journal.in_sector_pos) < sizeof(journal_entry_del) &&
@ -602,32 +462,24 @@ int blockstore_impl_t::dequeue_del(blockstore_op_t *op)
}
}
// Pre-fill journal entry
journal_entry_del *je = (journal_entry_del*)prefill_single_journal_entry(
journal, JE_DELETE, sizeof(struct journal_entry_del)
);
journal_entry_del *je = (journal_entry_del*)
prefill_single_journal_entry(journal, JE_DELETE, sizeof(struct journal_entry_del));
dirty_it->second.journal_sector = journal.sector_info[journal.cur_sector].offset;
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
#ifdef BLOCKSTORE_DEBUG
printf(
"journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version,
journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
);
printf("journal offset %lu is used by %lu:%lu v%lu\n", dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version);
#endif
je->oid = op->oid;
je->version = op->version;
je->crc32 = je_crc32((journal_entry*)je);
journal.crc32_last = je->crc32;
dirty_it->second.state = BS_ST_DELETE | BS_ST_SUBMITTED;
dirty_it->second.state = ST_DEL_SUBMITTED;
if (immediate_commit != IMMEDIATE_NONE)
{
prepare_journal_sector_write(journal, journal.cur_sector, sqe, cb);
PRIV(op)->min_flushed_journal_sector = PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
PRIV(op)->pending_ops++;
}
else
{
// Remember delete as unsynced
// Remember small write as unsynced
unsynced_small_writes.push_back((obj_ver_id){
.oid = op->oid,
.version = op->version,
@ -636,7 +488,7 @@ int blockstore_impl_t::dequeue_del(blockstore_op_t *op)
if (!PRIV(op)->pending_ops)
{
PRIV(op)->op_state = 4;
return continue_write(op);
continue_write(op);
}
else
{

357
cluster_client.cpp Normal file
View File

@ -0,0 +1,357 @@
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/epoll.h>
#include <netinet/tcp.h>
#include "cluster_client.h"
osd_op_t::~osd_op_t()
{
assert(!bs_op);
if (op_data)
{
free(op_data);
}
if (rmw_buf)
{
free(rmw_buf);
}
if (buf)
{
// Note: reusing osd_op_t WILL currently lead to memory leaks
// So we don't reuse it, but free it every time
free(buf);
}
}
void cluster_client_t::connect_peer(uint64_t peer_osd, json11::Json address_list, int port)
{
if (wanted_peers.find(peer_osd) == wanted_peers.end())
{
wanted_peers[peer_osd] = (osd_wanted_peer_t){
.address_list = address_list,
.port = port,
};
}
else
{
wanted_peers[peer_osd].address_list = address_list;
wanted_peers[peer_osd].port = port;
}
wanted_peers[peer_osd].address_changed = true;
if (!wanted_peers[peer_osd].connecting &&
(time(NULL) - wanted_peers[peer_osd].last_connect_attempt) >= peer_connect_interval)
{
try_connect_peer(peer_osd);
}
}
void cluster_client_t::try_connect_peer(uint64_t peer_osd)
{
auto wp_it = wanted_peers.find(peer_osd);
if (wp_it == wanted_peers.end())
{
return;
}
if (osd_peer_fds.find(peer_osd) != osd_peer_fds.end())
{
wanted_peers.erase(peer_osd);
return;
}
auto & wp = wp_it->second;
if (wp.address_index >= wp.address_list.array_items().size())
{
return;
}
wp.cur_addr = wp.address_list[wp.address_index].string_value();
wp.cur_port = wp.port;
try_connect_peer_addr(peer_osd, wp.cur_addr.c_str(), wp.cur_port);
}
void cluster_client_t::try_connect_peer_addr(osd_num_t peer_osd, const char *peer_host, int peer_port)
{
struct sockaddr_in addr;
int r;
if ((r = inet_pton(AF_INET, peer_host, &addr.sin_addr)) != 1)
{
on_connect_peer(peer_osd, -EINVAL);
return;
}
addr.sin_family = AF_INET;
addr.sin_port = htons(peer_port ? peer_port : 11203);
int peer_fd = socket(AF_INET, SOCK_STREAM, 0);
if (peer_fd < 0)
{
on_connect_peer(peer_osd, -errno);
return;
}
fcntl(peer_fd, F_SETFL, fcntl(peer_fd, F_GETFL, 0) | O_NONBLOCK);
int timeout_id = -1;
if (peer_connect_timeout > 0)
{
timeout_id = tfd->set_timer(1000*peer_connect_timeout, false, [this, peer_fd](int timer_id)
{
osd_num_t peer_osd = clients[peer_fd].osd_num;
stop_client(peer_fd);
on_connect_peer(peer_osd, -EIO);
return;
});
}
r = connect(peer_fd, (sockaddr*)&addr, sizeof(addr));
if (r < 0 && errno != EINPROGRESS)
{
close(peer_fd);
on_connect_peer(peer_osd, -errno);
return;
}
assert(peer_osd != this->osd_num);
clients[peer_fd] = (osd_client_t){
.peer_addr = addr,
.peer_port = peer_port,
.peer_fd = peer_fd,
.peer_state = PEER_CONNECTING,
.connect_timeout_id = timeout_id,
.osd_num = peer_osd,
.in_buf = malloc(receive_buffer_size),
};
tfd->set_fd_handler(peer_fd, true, [this](int peer_fd, int epoll_events)
{
// Either OUT (connected) or HUP
handle_connect_epoll(peer_fd);
});
}
void cluster_client_t::handle_connect_epoll(int peer_fd)
{
auto & cl = clients[peer_fd];
if (cl.connect_timeout_id >= 0)
{
tfd->clear_timer(cl.connect_timeout_id);
cl.connect_timeout_id = -1;
}
osd_num_t peer_osd = cl.osd_num;
int result = 0;
socklen_t result_len = sizeof(result);
if (getsockopt(peer_fd, SOL_SOCKET, SO_ERROR, &result, &result_len) < 0)
{
result = errno;
}
if (result != 0)
{
stop_client(peer_fd);
on_connect_peer(peer_osd, -result);
return;
}
int one = 1;
setsockopt(peer_fd, SOL_TCP, TCP_NODELAY, &one, sizeof(one));
cl.peer_state = PEER_CONNECTED;
tfd->set_fd_handler(peer_fd, false, [this](int peer_fd, int epoll_events)
{
handle_peer_epoll(peer_fd, epoll_events);
});
// Check OSD number
check_peer_config(cl);
}
void cluster_client_t::handle_peer_epoll(int peer_fd, int epoll_events)
{
// Mark client as ready (i.e. some data is available)
if (epoll_events & EPOLLRDHUP)
{
// Stop client
printf("[OSD %lu] client %d disconnected\n", this->osd_num, peer_fd);
stop_client(peer_fd);
}
else if (epoll_events & EPOLLIN)
{
// Mark client as ready (i.e. some data is available)
auto & cl = clients[peer_fd];
cl.read_ready++;
if (cl.read_ready == 1)
{
read_ready_clients.push_back(cl.peer_fd);
ringloop->wakeup();
}
}
}
void cluster_client_t::on_connect_peer(osd_num_t peer_osd, int peer_fd)
{
auto & wp = wanted_peers.at(peer_osd);
wp.connecting = false;
if (peer_fd < 0)
{
printf("Failed to connect to peer OSD %lu address %s port %d: %s\n", peer_osd, wp.cur_addr.c_str(), wp.cur_port, strerror(-peer_fd));
if (wp.address_changed)
{
wp.address_changed = false;
wp.address_index = 0;
try_connect_peer(peer_osd);
}
else if (wp.address_index < wp.address_list.array_items().size()-1)
{
// Try other addresses
wp.address_index++;
try_connect_peer(peer_osd);
}
else
{
// Retry again in <peer_connect_interval> seconds
wp.last_connect_attempt = time(NULL);
wp.address_index = 0;
tfd->set_timer(1000*peer_connect_interval, false, [this, peer_osd](int)
{
try_connect_peer(peer_osd);
});
}
return;
}
printf("Connected with peer OSD %lu (fd %d)\n", peer_osd, peer_fd);
wanted_peers.erase(peer_osd);
repeer_pgs(peer_osd);
}
void cluster_client_t::check_peer_config(osd_client_t & cl)
{
osd_op_t *op = new osd_op_t();
op->op_type = OSD_OP_OUT;
op->send_list.push_back(op->req.buf, OSD_PACKET_SIZE);
op->peer_fd = cl.peer_fd;
op->req = {
.show_conf = {
.header = {
.magic = SECONDARY_OSD_OP_MAGIC,
.id = this->next_subop_id++,
.opcode = OSD_OP_SHOW_CONFIG,
},
},
};
op->callback = [this](osd_op_t *op)
{
osd_client_t & cl = clients[op->peer_fd];
std::string json_err;
json11::Json config;
bool err = false;
if (op->reply.hdr.retval < 0)
{
err = true;
printf("Failed to get config from OSD %lu (retval=%ld), disconnecting peer\n", cl.osd_num, op->reply.hdr.retval);
}
else
{
config = json11::Json::parse(std::string((char*)op->buf), json_err);
if (json_err != "")
{
err = true;
printf("Failed to get config from OSD %lu: bad JSON: %s, disconnecting peer\n", cl.osd_num, json_err.c_str());
}
else if (config["osd_num"].uint64_value() != cl.osd_num)
{
err = true;
printf("Connected to OSD %lu instead of OSD %lu, peer state is outdated, disconnecting peer\n", config["osd_num"].uint64_value(), cl.osd_num);
on_connect_peer(cl.osd_num, -1);
}
}
if (err)
{
stop_client(op->peer_fd);
delete op;
return;
}
osd_peer_fds[cl.osd_num] = cl.peer_fd;
on_connect_peer(cl.osd_num, cl.peer_fd);
delete op;
};
outbox_push(op);
}
void cluster_client_t::cancel_osd_ops(osd_client_t & cl)
{
for (auto p: cl.sent_ops)
{
cancel_out_op(p.second);
}
cl.sent_ops.clear();
for (auto op: cl.outbox)
{
cancel_out_op(op);
}
cl.outbox.clear();
if (cl.write_op)
{
cancel_out_op(cl.write_op);
cl.write_op = NULL;
}
}
void cluster_client_t::cancel_out_op(osd_op_t *op)
{
op->reply.hdr.magic = SECONDARY_OSD_REPLY_MAGIC;
op->reply.hdr.id = op->req.hdr.id;
op->reply.hdr.opcode = op->req.hdr.opcode;
op->reply.hdr.retval = -EPIPE;
// Copy lambda to be unaffected by `delete op`
std::function<void(osd_op_t*)>(op->callback)(op);
}
void cluster_client_t::stop_client(int peer_fd)
{
assert(peer_fd != 0);
auto it = clients.find(peer_fd);
if (it == clients.end())
{
return;
}
uint64_t repeer_osd = 0;
osd_client_t cl = it->second;
if (cl.peer_state == PEER_CONNECTED)
{
if (cl.osd_num)
{
// Reload configuration from etcd when the connection is dropped
printf("[OSD %lu] Stopping client %d (OSD peer %lu)\n", osd_num, peer_fd, cl.osd_num);
repeer_osd = cl.osd_num;
}
else
{
printf("[OSD %lu] Stopping client %d (regular client)\n", osd_num, peer_fd);
}
}
clients.erase(it);
tfd->set_fd_handler(peer_fd, false, NULL);
if (cl.osd_num)
{
osd_peer_fds.erase(cl.osd_num);
// Cancel outbound operations
cancel_osd_ops(cl);
}
if (cl.read_op)
{
delete cl.read_op;
cl.read_op = NULL;
}
for (auto rit = read_ready_clients.begin(); rit != read_ready_clients.end(); rit++)
{
if (*rit == peer_fd)
{
read_ready_clients.erase(rit);
break;
}
}
for (auto wit = write_ready_clients.begin(); wit != write_ready_clients.end(); wit++)
{
if (*wit == peer_fd)
{
write_ready_clients.erase(wit);
break;
}
}
free(cl.in_buf);
assert(peer_fd != 0);
close(peer_fd);
if (repeer_osd)
{
repeer_pgs(repeer_osd);
}
}

209
cluster_client.h Normal file
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@ -0,0 +1,209 @@
#pragma once
#include <sys/types.h>
#include <stdint.h>
#include <arpa/inet.h>
#include <malloc.h>
#include <set>
#include <map>
#include <deque>
#include <vector>
#include "json11/json11.hpp"
#include "osd_ops.h"
#include "timerfd_manager.h"
#include "ringloop.h"
#define OSD_OP_IN 0
#define OSD_OP_OUT 1
#define CL_READ_HDR 1
#define CL_READ_DATA 2
#define CL_READ_REPLY_DATA 3
#define CL_WRITE_READY 1
#define CL_WRITE_REPLY 2
#define MAX_EPOLL_EVENTS 64
#define OSD_OP_INLINE_BUF_COUNT 16
#define PEER_CONNECTING 1
#define PEER_CONNECTED 2
struct osd_op_buf_list_t
{
int count = 0, alloc = 0, sent = 0;
iovec *buf = NULL;
iovec inline_buf[OSD_OP_INLINE_BUF_COUNT];
~osd_op_buf_list_t()
{
if (buf && buf != inline_buf)
{
free(buf);
}
}
inline iovec* get_iovec()
{
return (buf ? buf : inline_buf) + sent;
}
inline int get_size()
{
return count - sent;
}
inline void push_back(void *nbuf, size_t len)
{
if (count >= alloc)
{
if (!alloc)
{
alloc = OSD_OP_INLINE_BUF_COUNT;
buf = inline_buf;
}
else if (buf == inline_buf)
{
int old = alloc;
alloc = ((alloc/16)*16 + 1);
buf = (iovec*)malloc(sizeof(iovec) * alloc);
memcpy(buf, inline_buf, sizeof(iovec)*old);
}
else
{
alloc = ((alloc/16)*16 + 1);
buf = (iovec*)realloc(buf, sizeof(iovec) * alloc);
}
}
buf[count++] = { .iov_base = nbuf, .iov_len = len };
}
};
struct blockstore_op_t;
struct osd_primary_op_data_t;
struct osd_op_t
{
timespec tv_begin;
uint64_t op_type = OSD_OP_IN;
int peer_fd;
osd_any_op_t req;
osd_any_reply_t reply;
blockstore_op_t *bs_op = NULL;
void *buf = NULL;
void *rmw_buf = NULL;
osd_primary_op_data_t* op_data = NULL;
std::function<void(osd_op_t*)> callback;
osd_op_buf_list_t send_list;
~osd_op_t();
};
struct osd_client_t
{
sockaddr_in peer_addr;
int peer_port;
int peer_fd;
int peer_state;
int connect_timeout_id = -1;
osd_num_t osd_num = 0;
void *in_buf = NULL;
// Read state
int read_ready = 0;
osd_op_t *read_op = NULL;
int read_reply_id = 0;
iovec read_iov;
msghdr read_msg;
void *read_buf = NULL;
int read_remaining = 0;
int read_state = 0;
// Outbound operations sent to this peer
std::map<int, osd_op_t*> sent_ops;
// Outbound messages (replies or requests)
std::deque<osd_op_t*> outbox;
// PGs dirtied by this client's primary-writes (FIXME to drop the connection)
std::set<pg_num_t> dirty_pgs;
// Write state
osd_op_t *write_op = NULL;
msghdr write_msg;
int write_state = 0;
};
struct osd_wanted_peer_t
{
json11::Json address_list;
int port;
time_t last_connect_attempt;
bool connecting, address_changed;
int address_index;
std::string cur_addr;
int cur_port;
};
struct osd_op_stats_t
{
uint64_t op_stat_sum[OSD_OP_MAX+1] = { 0 };
uint64_t op_stat_count[OSD_OP_MAX+1] = { 0 };
uint64_t op_stat_bytes[OSD_OP_MAX+1] = { 0 };
uint64_t subop_stat_sum[OSD_OP_MAX+1] = { 0 };
uint64_t subop_stat_count[OSD_OP_MAX+1] = { 0 };
};
struct cluster_client_t
{
timerfd_manager_t *tfd;
ring_loop_t *ringloop;
// osd_num_t is only for logging and asserts
osd_num_t osd_num;
int receive_buffer_size = 9000;
int peer_connect_interval = 5;
int peer_connect_timeout = 5;
int log_level = 0;
std::map<osd_num_t, osd_wanted_peer_t> wanted_peers;
std::map<uint64_t, int> osd_peer_fds;
uint64_t next_subop_id = 1;
std::map<int, osd_client_t> clients;
std::vector<int> read_ready_clients;
std::vector<int> write_ready_clients;
// op statistics
osd_op_stats_t stats;
// public
void connect_peer(uint64_t osd_num, json11::Json address_list, int port);
void stop_client(int peer_fd);
void outbox_push(osd_op_t *cur_op);
std::function<void(osd_op_t*)> exec_op;
std::function<void(osd_num_t)> repeer_pgs;
// private
void try_connect_peer(uint64_t osd_num);
void try_connect_peer_addr(osd_num_t peer_osd, const char *peer_host, int peer_port);
void handle_connect_epoll(int peer_fd);
void handle_peer_epoll(int peer_fd, int epoll_events);
void on_connect_peer(osd_num_t peer_osd, int peer_fd);
void check_peer_config(osd_client_t & cl);
void cancel_osd_ops(osd_client_t & cl);
void cancel_out_op(osd_op_t *op);
bool try_send(osd_client_t & cl);
void send_replies();
void handle_send(ring_data_t *data, int peer_fd);
void read_requests();
void handle_read(ring_data_t *data, int peer_fd);
void handle_finished_read(osd_client_t & cl);
void handle_op_hdr(osd_client_t *cl);
void handle_reply_hdr(osd_client_t *cl);
};

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@ -1,13 +0,0 @@
#!/bin/bash
gcc -I. -E -o fio_headers.i src/fio_headers.h
rm -rf fio-copy
for i in `grep -Po 'fio/[^"]+' fio_headers.i | sort | uniq`; do
j=${i##fio/}
p=$(dirname $j)
mkdir -p fio-copy/$p
cp $i fio-copy/$j
done
rm fio_headers.i

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@ -1,18 +0,0 @@
#!/bin/bash
#cd qemu
#debian/rules b/configure-stamp
#cd b/qemu; make qapi
gcc -I qemu/b/qemu `pkg-config glib-2.0 --cflags` \
-I qemu/include -E -o qemu_driver.i src/qemu_driver.c
rm -rf qemu-copy
for i in `grep -Po 'qemu/[^"]+' qemu_driver.i | sort | uniq`; do
j=${i##qemu/}
p=$(dirname $j)
mkdir -p qemu-copy/$p
cp $i qemu-copy/$j
done
rm qemu_driver.i

@ -1 +0,0 @@
Subproject commit 5dc108754ad40d3b1d024f9bd7cca0595ef1a1db

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@ -8,10 +8,4 @@
// unsigned __int64 _mm_crc32_u64 (unsigned __int64 crc, unsigned __int64 v)
// unsigned int _mm_crc32_u8 (unsigned int crc, unsigned char v)
#ifdef __cplusplus
extern "C" {
#endif
uint32_t crc32c(uint32_t crc, const void *buf, size_t len);
#ifdef __cplusplus
};
#endif

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@ -1,7 +0,0 @@
#!/bin/bash
sed 's/$REL/bullseye/g' < vitastor.Dockerfile > ../Dockerfile
cd ..
mkdir -p packages
sudo podman build -v `pwd`/packages:/root/packages -f Dockerfile .
rm Dockerfile

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@ -1,7 +0,0 @@
#!/bin/bash
sed 's/$REL/buster/g' < vitastor.Dockerfile > ../Dockerfile
cd ..
mkdir -p packages
sudo podman build -v `pwd`/packages:/root/packages -f Dockerfile .
rm Dockerfile

17
debian/changelog vendored
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@ -1,17 +0,0 @@
vitastor (0.5.10-1) unstable; urgency=medium
* Bugfixes
-- Vitaliy Filippov <vitalif@yourcmc.ru> Tue, 02 Feb 2021 23:01:24 +0300
vitastor (0.5.1-1) unstable; urgency=medium
* Add jerasure support
-- Vitaliy Filippov <vitalif@yourcmc.ru> Sat, 05 Dec 2020 17:02:26 +0300
vitastor (0.5-1) unstable; urgency=medium
* First packaging for Debian
-- Vitaliy Filippov <vitalif@yourcmc.ru> Thu, 05 Nov 2020 02:20:59 +0300

1
debian/compat vendored
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@ -1 +0,0 @@
13

17
debian/control vendored
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@ -1,17 +0,0 @@
Source: vitastor
Section: admin
Priority: optional
Maintainer: Vitaliy Filippov <vitalif@yourcmc.ru>
Build-Depends: debhelper, liburing-dev (>= 0.6), g++ (>= 8), libstdc++6 (>= 8), linux-libc-dev, libgoogle-perftools-dev, libjerasure-dev, libgf-complete-dev
Standards-Version: 4.5.0
Homepage: https://vitastor.io/
Rules-Requires-Root: no
Package: vitastor
Architecture: amd64
Depends: ${shlibs:Depends}, ${misc:Depends}, fio (= ${dep:fio}), qemu (= ${dep:qemu}), nodejs (>= 10), node-sprintf-js, node-ws (>= 7), libjerasure2, lp-solve
Description: Vitastor, a fast software-defined clustered block storage
Vitastor is a small, simple and fast clustered block storage (storage for VM drives),
architecturally similar to Ceph which means strong consistency, primary-replication,
symmetric clustering and automatic data distribution over any number of drives of any
size with configurable redundancy (replication or erasure codes/XOR).

21
debian/copyright vendored
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@ -1,21 +0,0 @@
Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: vitastor
Upstream-Contact: Vitaliy Filippov <vitalif@yourcmc.ru>
Source: https://vitastor.io
Files: *
Copyright: 2019+ Vitaliy Filippov <vitalif@yourcmc.ru>
License: Multiple licenses VNPL-1.1 and/or GPL-2.0+
All server-side code (OSD, Monitor and so on) is licensed under the terms of
Vitastor Network Public License 1.1 (VNPL 1.1), a copyleft license based on
GNU GPLv3.0 with the additional "Network Interaction" clause which requires
opensourcing all programs directly or indirectly interacting with Vitastor
through a computer network and expressly designed to be used in conjunction
with it ("Proxy Programs"). Proxy Programs may be made public not only under
the terms of the same license, but also under the terms of any GPL-Compatible
Free Software License, as listed by the Free Software Foundation.
This is a stricter copyleft license than the Affero GPL.
.
Client libraries (cluster_client and so on) are dual-licensed under the same
VNPL 1.1 and also GNU GPL 2.0 or later to allow for compatibility with GPLed
software like QEMU and fio.

3
debian/install vendored
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@ -1,3 +0,0 @@
VNPL-1.1.txt usr/share/doc/vitastor
GPL-2.0.txt usr/share/doc/vitastor
mon usr/lib/vitastor

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@ -1,44 +0,0 @@
# Build patched QEMU for Debian Buster or Bullseye/Sid inside a container
# cd ..; podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f debian/patched-qemu.Dockerfile .
FROM debian:$REL
WORKDIR /root
RUN if [ "$REL" = "buster" ]; then \
echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list; \
echo >> /etc/apt/preferences; \
echo 'Package: *' >> /etc/apt/preferences; \
echo 'Pin: release a=buster-backports' >> /etc/apt/preferences; \
echo 'Pin-Priority: 500' >> /etc/apt/preferences; \
fi; \
grep '^deb ' /etc/apt/sources.list | perl -pe 's/^deb/deb-src/' >> /etc/apt/sources.list; \
echo 'APT::Install-Recommends false;' >> /etc/apt/apt.conf; \
echo 'APT::Install-Suggests false;' >> /etc/apt/apt.conf
RUN apt-get update
RUN apt-get -y install qemu fio liburing1 liburing-dev libgoogle-perftools-dev devscripts
RUN apt-get -y build-dep qemu
RUN apt-get -y build-dep fio
RUN apt-get --download-only source qemu
RUN apt-get --download-only source fio
ADD qemu-5.0-vitastor.patch qemu-5.1-vitastor.patch /root/vitastor/
RUN set -e; \
mkdir -p /root/packages/qemu-$REL; \
rm -rf /root/packages/qemu-$REL/*; \
cd /root/packages/qemu-$REL; \
dpkg-source -x /root/qemu*.dsc; \
if [ -d /root/packages/qemu-$REL/qemu-5.0 ]; then \
cp /root/vitastor/qemu-5.0-vitastor.patch /root/packages/qemu-$REL/qemu-5.0/debian/patches; \
echo qemu-5.0-vitastor.patch >> /root/packages/qemu-$REL/qemu-5.0/debian/patches/series; \
else \
cp /root/vitastor/qemu-5.1-vitastor.patch /root/packages/qemu-$REL/qemu-*/debian/patches; \
P=`ls -d /root/packages/qemu-$REL/qemu-*/debian/patches`; \
echo qemu-5.1-vitastor.patch >> $P/series; \
fi; \
cd /root/packages/qemu-$REL/qemu-*/; \
V=$(head -n1 debian/changelog | perl -pe 's/^.*\((.*?)(~bpo[\d\+]*)?\).*$/$1/')+vitastor1; \
DEBFULLNAME="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v $V 'Plug Vitastor block driver'; \
DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \
rm -rf /root/packages/qemu-$REL/qemu-*/

9
debian/rules vendored
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@ -1,9 +0,0 @@
#!/usr/bin/make -f
export DH_VERBOSE = 1
%:
dh $@
override_dh_installdeb:
cat debian/substvars >> debian/vitastor.substvars
dh_installdeb

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@ -1 +0,0 @@
3.0 (quilt)

2
debian/substvars vendored
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@ -1,2 +0,0 @@
dep:fio=3.16-1
dep:qemu=1:5.1+dfsg-4+vitastor1

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@ -1,67 +0,0 @@
# Build Vitastor packages for Debian Buster or Bullseye/Sid inside a container
# cd ..; podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f debian/vitastor.Dockerfile .
FROM debian:$REL
WORKDIR /root
RUN if [ "$REL" = "buster" ]; then \
echo 'deb http://deb.debian.org/debian buster-backports main' >> /etc/apt/sources.list; \
echo >> /etc/apt/preferences; \
echo 'Package: *' >> /etc/apt/preferences; \
echo 'Pin: release a=buster-backports' >> /etc/apt/preferences; \
echo 'Pin-Priority: 500' >> /etc/apt/preferences; \
fi; \
grep '^deb ' /etc/apt/sources.list | perl -pe 's/^deb/deb-src/' >> /etc/apt/sources.list; \
echo 'APT::Install-Recommends false;' >> /etc/apt/apt.conf; \
echo 'APT::Install-Suggests false;' >> /etc/apt/apt.conf
RUN apt-get update
RUN apt-get -y install qemu fio liburing1 liburing-dev libgoogle-perftools-dev devscripts
RUN apt-get -y build-dep qemu
RUN apt-get -y build-dep fio
RUN apt-get --download-only source qemu
RUN apt-get --download-only source fio
RUN apt-get -y install libjerasure-dev cmake
ADD . /root/vitastor
RUN set -e -x; \
mkdir -p /root/fio-build/; \
cd /root/fio-build/; \
rm -rf /root/fio-build/*; \
dpkg-source -x /root/fio*.dsc; \
cd /root/packages/qemu-$REL/; \
rm -rf qemu*/; \
dpkg-source -x qemu*.dsc; \
cd /root/packages/qemu-$REL/qemu*/; \
debian/rules b/configure-stamp; \
cd b/qemu; \
make -j8 qapi/qapi-builtin-types.h; \
mkdir -p /root/packages/vitastor-$REL; \
rm -rf /root/packages/vitastor-$REL/*; \
cd /root/packages/vitastor-$REL; \
cp -r /root/vitastor vitastor-0.5.10; \
ln -s /root/packages/qemu-$REL/qemu-*/ vitastor-0.5.10/qemu; \
ln -s /root/fio-build/fio-*/ vitastor-0.5.10/fio; \
cd vitastor-0.5.10; \
FIO=$(head -n1 fio/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
QEMU=$(head -n1 qemu/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
sh copy-qemu-includes.sh; \
sh copy-fio-includes.sh; \
rm qemu fio; \
mkdir -p a b debian/patches; \
mv qemu-copy b/qemu; \
mv fio-copy b/fio; \
diff -NaurpbB a b > debian/patches/qemu-fio-headers.patch || true; \
echo qemu-fio-headers.patch >> debian/patches/series; \
rm -rf a b; \
rm -rf /root/packages/qemu-$REL/qemu*/; \
echo "dep:fio=$FIO" > debian/substvars; \
echo "dep:qemu=$QEMU" >> debian/substvars; \
cd /root/packages/vitastor-$REL; \
tar --sort=name --mtime='2020-01-01' --owner=0 --group=0 --exclude=debian -cJf vitastor_0.5.10.orig.tar.xz vitastor-0.5.10; \
cd vitastor-0.5.10; \
V=$(head -n1 debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
DEBFULLNAME="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v "$V""$REL" "Rebuild for $REL"; \
DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \
rm -rf /root/packages/vitastor-$REL/vitastor-*/

165
dump_journal.cpp Normal file
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#define _LARGEFILE64_SOURCE
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdint.h>
#include <malloc.h>
#include <linux/fs.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <stdio.h>
#include "blockstore_impl.h"
#include "crc32c.h"
struct journal_dump_t
{
char *journal_device;
uint32_t journal_block;
uint64_t journal_offset;
uint64_t journal_len;
uint64_t journal_pos;
int fd;
void dump_block(void *buf);
};
int main(int argc, char *argv[])
{
if (argc < 5)
{
printf("USAGE: %s <journal_file> <journal_block_size> <offset> <size>\n", argv[0]);
return 1;
}
journal_dump_t self;
self.journal_device = argv[1];
self.journal_block = strtoul(argv[2], NULL, 10);
self.journal_offset = strtoull(argv[3], NULL, 10);
self.journal_len = strtoull(argv[4], NULL, 10);
if (self.journal_block < MEM_ALIGNMENT || (self.journal_block % MEM_ALIGNMENT) ||
self.journal_block > 128*1024)
{
printf("Invalid journal block size\n");
return 1;
}
self.fd = open(self.journal_device, O_DIRECT|O_RDONLY);
if (self.fd == -1)
{
printf("Failed to open journal\n");
return 1;
}
void *data = memalign(MEM_ALIGNMENT, self.journal_block);
self.journal_pos = 0;
while (self.journal_pos < self.journal_len)
{
int r = pread(self.fd, data, self.journal_block, self.journal_offset+self.journal_pos);
assert(r == self.journal_block);
uint64_t s;
for (s = 0; s < self.journal_block; s += 8)
{
if (*((uint64_t*)(data+s)) != 0)
break;
}
if (s == self.journal_block)
{
printf("offset %08lx: zeroes\n", self.journal_pos);
self.journal_pos += self.journal_block;
}
else if (((journal_entry*)data)->magic == JOURNAL_MAGIC)
{
printf("offset %08lx:\n", self.journal_pos);
self.dump_block(data);
}
else
{
printf("offset %08lx: no magic in the beginning, looks like random data (pattern=%lx)\n", self.journal_pos, *((uint64_t*)data));
self.journal_pos += self.journal_block;
}
}
free(data);
close(self.fd);
return 0;
}
void journal_dump_t::dump_block(void *buf)
{
uint32_t pos = 0;
journal_pos += journal_block;
int entry = 0;
bool wrapped = false;
while (pos < journal_block)
{
journal_entry *je = (journal_entry*)(buf + pos);
if (je->magic != JOURNAL_MAGIC || je->type < JE_START || je->type > JE_DELETE)
{
break;
}
const char *crc32_valid = je_crc32(je) == je->crc32 ? "(valid)" : "(invalid)";
printf("entry % 3d: crc32=%08x %s prev=%08x ", entry, je->crc32, crc32_valid, je->crc32_prev);
if (je->type == JE_START)
{
printf("je_start start=%08lx\n", je->start.journal_start);
}
else if (je->type == JE_SMALL_WRITE)
{
printf(
"je_small_write oid=%lu:%lu ver=%lu offset=%u len=%u loc=%08lx",
je->small_write.oid.inode, je->small_write.oid.stripe,
je->small_write.version, je->small_write.offset, je->small_write.len,
je->small_write.data_offset
);
if (journal_pos + je->small_write.len > journal_len)
{
// data continues from the beginning of the journal
journal_pos = journal_block;
wrapped = true;
}
if (journal_pos != je->small_write.data_offset)
{
printf(" (mismatched, calculated = %lu)", journal_pos);
}
journal_pos += je->small_write.len;
if (journal_pos >= journal_len)
{
journal_pos = journal_block;
wrapped = true;
}
uint32_t data_crc32 = 0;
void *data = memalign(MEM_ALIGNMENT, je->small_write.len);
assert(pread(fd, data, je->small_write.len, journal_offset+je->small_write.data_offset) == je->small_write.len);
data_crc32 = crc32c(0, data, je->small_write.len);
free(data);
printf(
" data_crc32=%08x%s", je->small_write.crc32_data,
(data_crc32 != je->small_write.crc32_data) ? " (invalid)" : " (valid)"
);
printf("\n");
}
else if (je->type == JE_BIG_WRITE)
{
printf("je_big_write oid=%lu:%lu ver=%lu loc=%08lx\n", je->big_write.oid.inode, je->big_write.oid.stripe, je->big_write.version, je->big_write.location);
}
else if (je->type == JE_STABLE)
{
printf("je_stable oid=%lu:%lu ver=%lu\n", je->stable.oid.inode, je->stable.oid.stripe, je->stable.version);
}
else if (je->type == JE_ROLLBACK)
{
printf("je_rollback oid=%lu:%lu ver=%lu\n", je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version);
}
else if (je->type == JE_DELETE)
{
printf("je_delete oid=%lu:%lu ver=%lu\n", je->del.oid.inode, je->del.oid.stripe, je->del.version);
}
pos += je->size;
entry++;
}
if (wrapped)
{
journal_pos = journal_len;
}
}

374
etcd_state_client.cpp Normal file
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@ -0,0 +1,374 @@
#include "osd_ops.h"
#include "pg_states.h"
#include "etcd_state_client.h"
#include "http_client.h"
#include "base64.h"
json_kv_t etcd_state_client_t::parse_etcd_kv(const json11::Json & kv_json)
{
json_kv_t kv;
kv.key = base64_decode(kv_json["key"].string_value());
std::string json_err, json_text = base64_decode(kv_json["value"].string_value());
kv.value = json_text == "" ? json11::Json() : json11::Json::parse(json_text, json_err);
if (json_err != "")
{
printf("Bad JSON in etcd key %s: %s (value: %s)\n", kv.key.c_str(), json_err.c_str(), json_text.c_str());
kv.key = "";
}
return kv;
}
void etcd_state_client_t::etcd_txn(json11::Json txn, int timeout, std::function<void(std::string, json11::Json)> callback)
{
etcd_call("/kv/txn", txn, timeout, callback);
}
void etcd_state_client_t::etcd_call(std::string api, json11::Json payload, int timeout, std::function<void(std::string, json11::Json)> callback)
{
std::string etcd_address = etcd_addresses[rand() % etcd_addresses.size()];
std::string etcd_api_path;
int pos = etcd_address.find('/');
if (pos >= 0)
{
etcd_api_path = etcd_address.substr(pos);
etcd_address = etcd_address.substr(0, pos);
}
std::string req = payload.dump();
req = "POST "+etcd_api_path+api+" HTTP/1.1\r\n"
"Host: "+etcd_address+"\r\n"
"Content-Type: application/json\r\n"
"Content-Length: "+std::to_string(req.size())+"\r\n"
"Connection: close\r\n"
"\r\n"+req;
http_request_json(tfd, etcd_address, req, timeout, callback);
}
void etcd_state_client_t::start_etcd_watcher()
{
std::string etcd_address = etcd_addresses[rand() % etcd_addresses.size()];
std::string etcd_api_path;
int pos = etcd_address.find('/');
if (pos >= 0)
{
etcd_api_path = etcd_address.substr(pos);
etcd_address = etcd_address.substr(0, pos);
}
etcd_watches_initialised = 0;
etcd_watch_ws = open_websocket(tfd, etcd_address, etcd_api_path+"/watch", ETCD_SLOW_TIMEOUT, [this](const http_response_t *msg)
{
if (msg->body.length())
{
std::string json_err;
json11::Json data = json11::Json::parse(msg->body, json_err);
if (json_err != "")
{
printf("Bad JSON in etcd event: %s, ignoring event\n", json_err.c_str());
}
else
{
if (data["result"]["created"].bool_value())
{
etcd_watches_initialised++;
}
if (etcd_watches_initialised == 4)
{
etcd_watch_revision = data["result"]["header"]["revision"].uint64_value();
}
// First gather all changes into a hash to remove multiple overwrites
json11::Json::object changes;
for (auto & ev: data["result"]["events"].array_items())
{
auto kv = parse_etcd_kv(ev["kv"]);
if (kv.key != "")
{
changes[kv.key] = kv.value;
}
}
for (auto & kv: changes)
{
if (this->log_level > 0)
{
printf("Incoming event: %s -> %s\n", kv.first.c_str(), kv.second.dump().c_str());
}
parse_state(kv.first, kv.second);
}
// React to changes
on_change_hook(changes);
}
}
if (msg->eof)
{
etcd_watch_ws = NULL;
if (etcd_watches_initialised == 0)
{
// Connection not established, retry in <ETCD_SLOW_TIMEOUT>
tfd->set_timer(ETCD_SLOW_TIMEOUT, false, [this](int)
{
start_etcd_watcher();
});
}
else
{
// Connection was live, retry immediately
start_etcd_watcher();
}
}
});
etcd_watch_ws->post_message(WS_TEXT, json11::Json(json11::Json::object {
{ "create_request", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/config/") },
{ "range_end", base64_encode(etcd_prefix+"/config0") },
{ "start_revision", etcd_watch_revision+1 },
{ "watch_id", ETCD_CONFIG_WATCH_ID },
} }
}).dump());
etcd_watch_ws->post_message(WS_TEXT, json11::Json(json11::Json::object {
{ "create_request", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/osd/state/") },
{ "range_end", base64_encode(etcd_prefix+"/osd/state0") },
{ "start_revision", etcd_watch_revision+1 },
{ "watch_id", ETCD_OSD_STATE_WATCH_ID },
} }
}).dump());
etcd_watch_ws->post_message(WS_TEXT, json11::Json(json11::Json::object {
{ "create_request", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/pg/state/") },
{ "range_end", base64_encode(etcd_prefix+"/pg/state0") },
{ "start_revision", etcd_watch_revision+1 },
{ "watch_id", ETCD_PG_STATE_WATCH_ID },
} }
}).dump());
etcd_watch_ws->post_message(WS_TEXT, json11::Json(json11::Json::object {
{ "create_request", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/pg/history/") },
{ "range_end", base64_encode(etcd_prefix+"/pg/history0") },
{ "start_revision", etcd_watch_revision+1 },
{ "watch_id", ETCD_PG_HISTORY_WATCH_ID },
} }
}).dump());
}
void etcd_state_client_t::load_global_config()
{
etcd_call("/kv/range", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/config/global") }
}, ETCD_SLOW_TIMEOUT, [this](std::string err, json11::Json data)
{
if (err != "")
{
printf("Error reading OSD configuration from etcd: %s\n", err.c_str());
tfd->set_timer(ETCD_SLOW_TIMEOUT, false, [this](int timer_id)
{
load_global_config();
});
return;
}
if (!etcd_watch_revision)
{
etcd_watch_revision = data["header"]["revision"].uint64_value();
}
json11::Json::object global_config;
if (data["kvs"].array_items().size() > 0)
{
auto kv = parse_etcd_kv(data["kvs"][0]);
if (kv.value.is_object())
{
global_config = kv.value.object_items();
}
}
on_load_config_hook(global_config);
});
}
void etcd_state_client_t::load_pgs()
{
json11::Json::array txn = {
json11::Json::object {
{ "request_range", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/config/pgs") },
} }
},
json11::Json::object {
{ "request_range", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/pg/history/") },
{ "range_end", base64_encode(etcd_prefix+"/pg/history0") },
} }
},
json11::Json::object {
{ "request_range", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/pg/state/") },
{ "range_end", base64_encode(etcd_prefix+"/pg/state0") },
} }
},
json11::Json::object {
{ "request_range", json11::Json::object {
{ "key", base64_encode(etcd_prefix+"/osd/state/") },
{ "range_end", base64_encode(etcd_prefix+"/osd/state0") },
} }
},
};
json11::Json::object req = { { "success", txn } };
json11::Json checks = load_pgs_checks_hook();
if (checks.array_items().size() > 0)
{
req["compare"] = checks;
}
etcd_txn(req, ETCD_SLOW_TIMEOUT, [this](std::string err, json11::Json data)
{
if (err != "")
{
printf("Error loading PGs from etcd: %s\n", err.c_str());
tfd->set_timer(ETCD_SLOW_TIMEOUT, false, [this](int timer_id)
{
load_pgs();
});
return;
}
if (!data["succeeded"].bool_value())
{
on_load_pgs_hook(false);
return;
}
for (auto & res: data["responses"].array_items())
{
for (auto & kv_json: res["response_range"]["kvs"].array_items())
{
auto kv = parse_etcd_kv(kv_json);
parse_state(kv.key, kv.value);
}
}
on_load_pgs_hook(true);
});
}
void etcd_state_client_t::parse_state(const std::string & key, const json11::Json & value)
{
if (key == etcd_prefix+"/config/pgs")
{
for (auto & pg_item: this->pg_config)
{
pg_item.second.exists = false;
}
for (auto & pg_item: value["items"].object_items())
{
pg_num_t pg_num = stoull_full(pg_item.first);
if (!pg_num)
{
printf("Bad key in PG configuration: %s (must be a number), skipped\n", pg_item.first.c_str());
continue;
}
this->pg_config[pg_num].exists = true;
this->pg_config[pg_num].pause = pg_item.second["pause"].bool_value();
this->pg_config[pg_num].primary = pg_item.second["primary"].uint64_value();
this->pg_config[pg_num].target_set.clear();
for (auto pg_osd: pg_item.second["osd_set"].array_items())
{
this->pg_config[pg_num].target_set.push_back(pg_osd.uint64_value());
}
if (this->pg_config[pg_num].target_set.size() != 3)
{
printf("Bad PG %u config format: incorrect osd_set = %s\n", pg_num, pg_item.second["osd_set"].dump().c_str());
this->pg_config[pg_num].target_set.resize(3);
this->pg_config[pg_num].pause = true;
}
}
}
else if (key.substr(0, etcd_prefix.length()+12) == etcd_prefix+"/pg/history/")
{
// <etcd_prefix>/pg/history/%d
pg_num_t pg_num = stoull_full(key.substr(etcd_prefix.length()+12));
if (!pg_num)
{
printf("Bad etcd key %s, ignoring\n", key.c_str());
}
else
{
auto & pg_cfg = this->pg_config[pg_num];
pg_cfg.target_history.clear();
pg_cfg.all_peers.clear();
// Refuse to start PG if any set of the <osd_sets> has no live OSDs
for (auto hist_item: value["osd_sets"].array_items())
{
std::vector<osd_num_t> history_set;
for (auto pg_osd: hist_item.array_items())
{
history_set.push_back(pg_osd.uint64_value());
}
pg_cfg.target_history.push_back(history_set);
}
// Include these additional OSDs when peering the PG
for (auto pg_osd: value["all_peers"].array_items())
{
pg_cfg.all_peers.push_back(pg_osd.uint64_value());
}
}
}
else if (key.substr(0, etcd_prefix.length()+10) == etcd_prefix+"/pg/state/")
{
// <etcd_prefix>/pg/state/%d
pg_num_t pg_num = stoull_full(key.substr(etcd_prefix.length()+10));
if (!pg_num)
{
printf("Bad etcd key %s, ignoring\n", key.c_str());
}
else if (value.is_null())
{
this->pg_config[pg_num].cur_primary = 0;
this->pg_config[pg_num].cur_state = 0;
}
else
{
osd_num_t cur_primary = value["primary"].uint64_value();
int state = 0;
for (auto & e: value["state"].array_items())
{
int i;
for (i = 0; i < pg_state_bit_count; i++)
{
if (e.string_value() == pg_state_names[i])
{
state = state | pg_state_bits[i];
break;
}
}
if (i >= pg_state_bit_count)
{
printf("Unexpected PG %u state keyword in etcd: %s\n", pg_num, e.dump().c_str());
return;
}
}
if (!cur_primary || !value["state"].is_array() || !state ||
(state & PG_OFFLINE) && state != PG_OFFLINE ||
(state & PG_PEERING) && state != PG_PEERING ||
(state & PG_INCOMPLETE) && state != PG_INCOMPLETE)
{
printf("Unexpected PG %u state in etcd: primary=%lu, state=%s\n", pg_num, cur_primary, value["state"].dump().c_str());
return;
}
this->pg_config[pg_num].cur_primary = cur_primary;
this->pg_config[pg_num].cur_state = state;
}
}
else if (key.substr(0, etcd_prefix.length()+11) == etcd_prefix+"/osd/state/")
{
// <etcd_prefix>/osd/state/%d
osd_num_t peer_osd = std::stoull(key.substr(etcd_prefix.length()+11));
if (peer_osd > 0)
{
if (value.is_object() && value["state"] == "up" &&
value["addresses"].is_array() &&
value["port"].int64_value() > 0 && value["port"].int64_value() < 65536)
{
this->peer_states[peer_osd] = value;
}
else
{
this->peer_states.erase(peer_osd);
}
if (on_change_osd_state_hook != NULL)
{
on_change_osd_state_hook(peer_osd);
}
}
}
}

View File

@ -1,9 +1,5 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
#pragma once
#include "osd_id.h"
#include "http_client.h"
#include "timerfd_manager.h"
@ -16,14 +12,6 @@
#define ETCD_SLOW_TIMEOUT 5000
#define ETCD_QUICK_TIMEOUT 1000
#define DEFAULT_BLOCK_SIZE 128*1024
struct json_kv_t
{
std::string key;
json11::Json value;
};
struct pg_config_t
{
bool exists;
@ -34,47 +22,16 @@ struct pg_config_t
bool pause;
osd_num_t cur_primary;
int cur_state;
uint64_t epoch;
};
struct pool_config_t
struct json_kv_t
{
bool exists;
pool_id_t id;
std::string name;
uint64_t scheme;
uint64_t pg_size, pg_minsize, parity_chunks;
uint64_t pg_count;
uint64_t real_pg_count;
std::string failure_domain;
uint64_t max_osd_combinations;
uint64_t pg_stripe_size;
std::map<pg_num_t, pg_config_t> pg_config;
};
struct inode_config_t
{
uint64_t num;
std::string name;
uint64_t size;
inode_t parent_id;
bool readonly;
};
struct inode_watch_t
{
std::string name;
inode_config_t cfg;
std::string key;
json11::Json value;
};
struct etcd_state_client_t
{
protected:
std::vector<inode_watch_t*> watches;
websocket_t *etcd_watch_ws = NULL;
uint64_t bs_block_size = 0;
void add_etcd_url(std::string);
public:
std::vector<std::string> etcd_addresses;
std::string etcd_prefix;
int log_level = 0;
@ -82,17 +39,15 @@ public:
int etcd_watches_initialised = 0;
uint64_t etcd_watch_revision = 0;
std::map<pool_id_t, pool_config_t> pool_config;
websocket_t *etcd_watch_ws = NULL;
std::map<pg_num_t, pg_config_t> pg_config;
std::map<osd_num_t, json11::Json> peer_states;
std::map<inode_t, inode_config_t> inode_config;
std::map<std::string, inode_t> inode_by_name;
std::function<void(json11::Json::object &)> on_change_hook;
std::function<void(json11::Json::object &)> on_load_config_hook;
std::function<json11::Json()> load_pgs_checks_hook;
std::function<void(bool)> on_load_pgs_hook;
std::function<void(pool_id_t, pg_num_t)> on_change_pg_history_hook;
std::function<void(osd_num_t)> on_change_osd_state_hook;
std::function<void(uint64_t)> on_change_osd_state_hook;
json_kv_t parse_etcd_kv(const json11::Json & kv_json);
void etcd_call(std::string api, json11::Json payload, int timeout, std::function<void(std::string, json11::Json)> callback);
@ -101,8 +56,4 @@ public:
void load_global_config();
void load_pgs();
void parse_state(const std::string & key, const json11::Json & value);
void parse_config(json11::Json & config);
inode_watch_t* watch_inode(std::string name);
void close_watch(inode_watch_t* watch);
~etcd_state_client_t();
};

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
// FIO engine to test Blockstore
//
// Initialize storage for tests:
@ -25,7 +22,12 @@
// -bs_config='{"data_device":"./test_data.bin"}' -size=1000M
#include "blockstore.h"
#include "fio_headers.h"
extern "C" {
#define CONFIG_HAVE_GETTID
#define CONFIG_PWRITEV2
#include "fio/fio.h"
#include "fio/optgroup.h"
}
#include "json11/json11.hpp"
@ -288,7 +290,7 @@ static int bs_invalidate(struct thread_data *td, struct fio_file *f)
}
struct ioengine_ops ioengine = {
.name = "vitastor_blockstore",
.name = "microceph_blockstore",
.version = FIO_IOOPS_VERSION,
.flags = FIO_MEMALIGN | FIO_DISKLESSIO | FIO_NOEXTEND,
.setup = bs_setup,

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
// FIO engine to test Blockstore through Secondary OSD interface
//
// Prepare storage like in fio_engine.cpp, then start OSD with ./osd, then test it
@ -8,7 +5,7 @@
// Random write:
//
// fio -thread -ioengine=./libfio_sec_osd.so -name=test -bs=4k -direct=1 -fsync=16 -iodepth=16 -rw=randwrite \
// -host=127.0.0.1 -port=11203 [-block_size_order=17] [-single_primary=1] -size=1000M
// -host=127.0.0.1 -port=11203 [-single_primary=1] -size=1000M
//
// Linear write:
//
@ -30,7 +27,12 @@
#include "rw_blocking.h"
#include "osd_ops.h"
#include "fio_headers.h"
extern "C" {
#define CONFIG_HAVE_GETTID
#define CONFIG_PWRITEV2
#include "fio/fio.h"
#include "fio/optgroup.h"
}
struct sec_data
{
@ -51,7 +53,6 @@ struct sec_options
int port = 0;
int single_primary = 0;
int trace = 0;
int block_order = 17;
};
static struct fio_option options[] = {
@ -73,15 +74,6 @@ static struct fio_option options[] = {
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_FILENAME,
},
{
.name = "block_size_order",
.lname = "Blockstore block size order",
.type = FIO_OPT_INT,
.off1 = offsetof(struct sec_options, block_order),
.help = "Blockstore block size order (size = 2^order)",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_FILENAME,
},
{
.name = "single_primary",
.lname = "Single Primary",
@ -140,7 +132,6 @@ static void sec_cleanup(struct thread_data *td)
if (bsd)
{
close(bsd->connect_fd);
delete bsd;
}
}
@ -149,8 +140,6 @@ static int sec_init(struct thread_data *td)
{
sec_options *o = (sec_options*)td->eo;
sec_data *bsd = (sec_data*)td->io_ops_data;
bsd->block_order = o->block_order == 0 ? 17 : o->block_order;
bsd->block_size = 1 << o->block_order;
struct sockaddr_in addr;
int r;
@ -204,7 +193,7 @@ static enum fio_q_status sec_queue(struct thread_data *td, struct io_u *io)
case DDIR_READ:
if (!opt->single_primary)
{
op.hdr.opcode = OSD_OP_SEC_READ;
op.hdr.opcode = OSD_OP_SECONDARY_READ;
op.sec_rw.oid = {
.inode = 1,
.stripe = io->offset >> bsd->block_order,
@ -225,7 +214,7 @@ static enum fio_q_status sec_queue(struct thread_data *td, struct io_u *io)
case DDIR_WRITE:
if (!opt->single_primary)
{
op.hdr.opcode = OSD_OP_SEC_WRITE;
op.hdr.opcode = OSD_OP_SECONDARY_WRITE;
op.sec_rw.oid = {
.inode = 1,
.stripe = io->offset >> bsd->block_order,
@ -313,7 +302,6 @@ static int sec_getevents(struct thread_data *td, unsigned int min, unsigned int
exit(1);
}
io_u* io = it->second;
bsd->queue.erase(it);
if (io->ddir == DDIR_READ)
{
if (reply.hdr.retval != io->xfer_buflen)
@ -381,7 +369,7 @@ static int sec_invalidate(struct thread_data *td, struct fio_file *f)
}
struct ioengine_ops ioengine = {
.name = "vitastor_secondary_osd",
.name = "microceph_secondary_osd",
.version = FIO_IOOPS_VERSION,
.flags = FIO_MEMALIGN | FIO_DISKLESSIO | FIO_NOEXTEND,
.setup = sec_setup,

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
#include <netinet/tcp.h>
#include <sys/epoll.h>
@ -13,8 +10,6 @@
#include <fcntl.h>
#include <string.h>
#include <stdexcept>
#include "json11/json11.hpp"
#include "http_client.h"
#include "timerfd_manager.h"
@ -22,6 +17,7 @@
#define READ_BUFFER_SIZE 9000
static int extract_port(std::string & host);
static std::string strtolower(const std::string & in);
static std::string trim(const std::string & in);
static std::string ws_format_frame(int type, uint64_t size);
static bool ws_parse_frame(std::string & buf, int & type, std::string & res);
@ -54,15 +50,8 @@ struct http_co_t
websocket_t ws;
int onstack = 0;
bool ended = false;
~http_co_t();
inline void stackin() { onstack++; }
inline void stackout() { onstack--; if (!onstack && ended) end(); }
inline void end() { ended = true; if (!onstack) { delete this; } }
void start_connection();
void handle_events();
void handle_connect_result();
void submit_read();
void submit_send();
@ -148,7 +137,7 @@ void websocket_t::post_message(int type, const std::string & msg)
void websocket_t::close()
{
co->end();
delete co;
}
http_co_t::~http_co_t()
@ -184,15 +173,14 @@ http_co_t::~http_co_t()
void http_co_t::start_connection()
{
stackin();
int port = extract_port(host);
struct sockaddr_in addr;
int r;
if ((r = inet_pton(AF_INET, host.c_str(), &addr.sin_addr)) != 1)
{
parsed.error_code = ENXIO;
stackout();
end();
// FIXME 'delete this' is ugly...
delete this;
return;
}
addr.sin_family = AF_INET;
@ -201,8 +189,7 @@ void http_co_t::start_connection()
if (peer_fd < 0)
{
parsed.error_code = errno;
stackout();
end();
delete this;
return;
}
fcntl(peer_fd, F_SETFL, fcntl(peer_fd, F_GETFL, 0) | O_NONBLOCK);
@ -214,57 +201,30 @@ void http_co_t::start_connection()
{
parsed.error_code = ETIME;
}
end();
delete this;
});
}
tfd->set_fd_handler(peer_fd, true, [this](int peer_fd, int epoll_events)
{
this->epoll_events |= epoll_events;
handle_connect_result();
});
epoll_events = 0;
// Finally call connect
r = ::connect(peer_fd, (sockaddr*)&addr, sizeof(addr));
if (r < 0 && errno != EINPROGRESS)
{
parsed.error_code = errno;
stackout();
end();
delete this;
return;
}
tfd->set_fd_handler(peer_fd, true, [this](int peer_fd, int epoll_events)
{
this->epoll_events |= epoll_events;
handle_events();
});
state = HTTP_CO_CONNECTING;
stackout();
}
void http_co_t::handle_events()
{
stackin();
while (epoll_events)
{
if (state == HTTP_CO_CONNECTING)
{
handle_connect_result();
}
else
{
epoll_events &= ~EPOLLOUT;
if (epoll_events & EPOLLIN)
{
submit_read();
}
else if (epoll_events & (EPOLLRDHUP|EPOLLERR))
{
end();
break;
}
}
}
stackout();
}
void http_co_t::handle_connect_result()
{
stackin();
if (epoll_events & (EPOLLOUT | EPOLLERR))
{
int result = 0;
socklen_t result_len = sizeof(result);
if (getsockopt(peer_fd, SOL_SOCKET, SO_ERROR, &result, &result_len) < 0)
@ -274,8 +234,7 @@ void http_co_t::handle_connect_result()
if (result != 0)
{
parsed.error_code = result;
stackout();
end();
delete this;
return;
}
int one = 1;
@ -283,17 +242,28 @@ void http_co_t::handle_connect_result()
tfd->set_fd_handler(peer_fd, false, [this](int peer_fd, int epoll_events)
{
this->epoll_events |= epoll_events;
handle_events();
if (this->epoll_events & EPOLLIN)
{
submit_read();
}
else if (this->epoll_events & (EPOLLRDHUP|EPOLLERR))
{
delete this;
}
});
state = HTTP_CO_SENDING_REQUEST;
submit_send();
stackout();
}
else
{
delete this;
}
}
void http_co_t::submit_read()
{
stackin();
int res;
again:
if (rbuf.size() != READ_BUFFER_SIZE)
{
rbuf.resize(READ_BUFFER_SIZE);
@ -301,6 +271,7 @@ void http_co_t::submit_read()
read_iov = { .iov_base = rbuf.data(), .iov_len = READ_BUFFER_SIZE };
read_msg.msg_iov = &read_iov;
read_msg.msg_iovlen = 1;
epoll_events = epoll_events & ~EPOLLIN;
res = recvmsg(peer_fd, &read_msg, 0);
if (res < 0)
{
@ -308,26 +279,31 @@ void http_co_t::submit_read()
}
if (res == -EAGAIN)
{
epoll_events = epoll_events & ~EPOLLIN;
res = 0;
}
else if (res <= 0)
if (res < 0)
{
// < 0 means error, 0 means EOF
if (!res)
epoll_events = epoll_events & ~EPOLLIN;
end();
delete this;
return;
}
else
{
response += std::string(rbuf.data(), res);
handle_read();
if (res == READ_BUFFER_SIZE)
{
goto again;
}
if (!handle_read())
{
return;
}
if (res < READ_BUFFER_SIZE && (epoll_events & (EPOLLRDHUP|EPOLLERR)))
{
delete this;
return;
}
stackout();
}
void http_co_t::submit_send()
{
stackin();
int res;
again:
if (sent < request.size())
@ -335,7 +311,7 @@ again:
send_iov = (iovec){ .iov_base = (void*)(request.c_str()+sent), .iov_len = request.size()-sent };
send_msg.msg_iov = &send_iov;
send_msg.msg_iovlen = 1;
res = sendmsg(peer_fd, &send_msg, MSG_NOSIGNAL);
res = sendmsg(peer_fd, &send_msg, 0);
if (res < 0)
{
res = -errno;
@ -346,17 +322,14 @@ again:
}
else if (res < 0)
{
stackout();
end();
delete this;
return;
}
sent += res;
if (state == HTTP_CO_SENDING_REQUEST)
{
if (sent >= request.size())
{
state = HTTP_CO_REQUEST_SENT;
}
else
goto again;
}
@ -367,12 +340,10 @@ again:
goto again;
}
}
stackout();
}
bool http_co_t::handle_read()
{
stackin();
if (state == HTTP_CO_REQUEST_SENT)
{
int pos = response.find("\r\n\r\n");
@ -407,8 +378,7 @@ bool http_co_t::handle_read()
if (!target_response_size)
{
// Sorry, unsupported response
stackout();
end();
delete this;
return false;
}
}
@ -416,8 +386,7 @@ bool http_co_t::handle_read()
}
if (state == HTTP_CO_HEADERS_RECEIVED && target_response_size > 0 && response.size() >= target_response_size)
{
stackout();
end();
delete this;
return false;
}
if (state == HTTP_CO_CHUNKED && response.size() > 0)
@ -445,8 +414,7 @@ bool http_co_t::handle_read()
}
if (parsed.eof)
{
stackout();
end();
delete this;
return false;
}
if (want_streaming && parsed.body.size() > 0)
@ -463,13 +431,11 @@ bool http_co_t::handle_read()
parsed.body = "";
}
}
stackout();
return true;
}
void http_co_t::post_message(int type, const std::string & msg)
{
stackin();
if (state == HTTP_CO_WEBSOCKET)
{
request += ws_format_frame(type, msg.size());
@ -481,7 +447,6 @@ void http_co_t::post_message(int type, const std::string & msg)
ws_outbox += ws_format_frame(type, msg.size());
ws_outbox += msg;
}
stackout();
}
uint64_t stoull_full(const std::string & str, int base)
@ -672,7 +637,7 @@ static int extract_port(std::string & host)
return port;
}
std::string strtolower(const std::string & in)
static std::string strtolower(const std::string & in)
{
std::string s = in;
for (int i = 0; i < s.length(); i++)

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
#pragma once
#include <string>
#include <vector>
@ -49,8 +46,6 @@ std::vector<std::string> getifaddr_list(bool include_v6 = false);
uint64_t stoull_full(const std::string & str, int base = 10);
std::string strtolower(const std::string & in);
void http_request(timerfd_manager_t *tfd, const std::string & host, const std::string & request,
const http_options_t & options, std::function<void(const http_response_t *response)> callback);

1
json11

@ -1 +0,0 @@
Subproject commit 97f06cb20c1e136fd37d58fb40f57dd8f8a3a4a7

48
lambda_size.cpp Normal file
View File

@ -0,0 +1,48 @@
#include <iostream>
#include <functional>
#include <array>
#include <cstdlib> // for malloc() and free()
using namespace std;
// replace operator new and delete to log allocations
void* operator new(std::size_t n)
{
cout << "Allocating " << n << " bytes" << endl;
return malloc(n);
}
void operator delete(void* p) throw()
{
free(p);
}
class test
{
public:
std::string s;
void a(std::function<void()> & f, const char *str)
{
auto l = [this, str]() { cout << str << " ? " << s << " from this\n"; };
cout << "Assigning lambda3 of size " << sizeof(l) << endl;
f = l;
}
};
int main()
{
std::array<char, 16> arr1;
auto lambda1 = [arr1](){};
cout << "Assigning lambda1 of size " << sizeof(lambda1) << endl;
std::function<void()> f1 = lambda1;
std::array<char, 17> arr2;
auto lambda2 = [arr2](){};
cout << "Assigning lambda2 of size " << sizeof(lambda2) << endl;
std::function<void()> f2 = lambda2;
test t;
std::function<void()> f3;
t.s = "str";
t.a(f3, "huyambda");
f3();
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
// Data distribution optimizer using linear programming (lp_solve)
const child_process = require('child_process');
@ -28,7 +25,7 @@ async function lp_solve(text)
let vars = {};
for (const line of stdout.split(/\n/))
{
let m = /^(^Value of objective function: (-?[\d\.]+)|Actual values of the variables:)\s*$/.exec(line);
let m = /^(^Value of objective function: ([\d\.]+)|Actual values of the variables:)\s*$/.exec(line);
if (m)
{
if (m[2])
@ -50,34 +47,34 @@ async function lp_solve(text)
return { score, vars };
}
async function optimize_initial({ osd_tree, pg_count, pg_size = 3, pg_minsize = 2, max_combinations = 10000, parity_space = 1 })
async function optimize_initial(osd_tree, pg_count, max_combinations)
{
if (!pg_count || !osd_tree)
{
return null;
}
max_combinations = max_combinations || 10000;
const all_weights = Object.assign({}, ...Object.values(osd_tree));
const total_weight = Object.values(all_weights).reduce((a, c) => Number(a) + Number(c), 0);
const all_pgs = Object.values(random_combinations(osd_tree, pg_size, max_combinations, parity_space > 1));
let all_pgs = all_combinations(osd_tree, null, true);
if (all_pgs.length > max_combinations)
{
const prob = max_combinations/all_pgs.length;
all_pgs = all_pgs.filter(pg => Math.random() < prob);
}
const pg_per_osd = {};
for (const pg of all_pgs)
{
for (let i = 0; i < pg.length; i++)
for (const osd of pg)
{
const osd = pg[i];
pg_per_osd[osd] = pg_per_osd[osd] || [];
pg_per_osd[osd].push((i >= pg_minsize ? parity_space+'*' : '')+"pg_"+pg.join("_"));
pg_per_osd[osd].push("pg_"+pg.join("_"));
}
}
const pg_effsize = Math.min(pg_minsize, Object.keys(osd_tree).length)
+ Math.max(0, Math.min(pg_size, Object.keys(osd_tree).length) - pg_minsize) * parity_space;
const pg_size = Math.min(Object.keys(osd_tree).length, 3);
let lp = '';
lp += "max: "+all_pgs.map(pg => 'pg_'+pg.join('_')).join(' + ')+";\n";
for (const osd in pg_per_osd)
{
if (osd !== NO_OSD)
{
let osd_pg_count = all_weights[osd]/total_weight*pg_effsize*pg_count;
let osd_pg_count = all_weights[osd]/total_weight*pg_size*pg_count;
lp += pg_per_osd[osd].join(' + ')+' <= '+osd_pg_count+';\n';
}
}
@ -89,19 +86,11 @@ async function optimize_initial({ osd_tree, pg_count, pg_size = 3, pg_minsize =
const lp_result = await lp_solve(lp);
if (!lp_result)
{
console.log(lp);
throw new Error('Problem is infeasible or unbounded - is it a bug?');
}
const int_pgs = make_int_pgs(lp_result.vars, pg_count);
const eff = pg_list_space_efficiency(int_pgs, all_weights, pg_minsize, parity_space);
const res = {
score: lp_result.score,
weights: lp_result.vars,
int_pgs,
space: eff * pg_effsize,
total_space: total_weight,
};
return res;
const eff = pg_list_space_efficiency(int_pgs, all_weights);
return { score: lp_result.score, weights: lp_result.vars, int_pgs, space: eff*pg_size, total_space: total_weight };
}
function make_int_pgs(weights, pg_count)
@ -123,117 +112,11 @@ function make_int_pgs(weights, pg_count)
return int_pgs;
}
function calc_intersect_weights(pg_size, pg_count, prev_weights, all_pgs)
{
const move_weights = {};
if ((1 << pg_size) < pg_count)
{
const intersect = {};
for (const pg_name in prev_weights)
{
const pg = pg_name.substr(3).split(/_/);
for (let omit = 1; omit < (1 << pg_size); omit++)
{
let pg_omit = [ ...pg ];
let intersect_count = pg_size;
for (let i = 0; i < pg_size; i++)
{
if (omit & (1 << i))
{
pg_omit[i] = '';
intersect_count--;
}
}
pg_omit = pg_omit.join(':');
intersect[pg_omit] = Math.max(intersect[pg_omit] || 0, intersect_count);
}
}
for (const pg of all_pgs)
{
let max_int = 0;
for (let omit = 1; omit < (1 << pg_size); omit++)
{
let pg_omit = [ ...pg ];
for (let i = 0; i < pg_size; i++)
{
if (omit & (1 << i))
{
pg_omit[i] = '';
}
}
pg_omit = pg_omit.join(':');
max_int = Math.max(max_int, intersect[pg_omit] || 0);
}
move_weights['pg_'+pg.join('_')] = pg_size-max_int;
}
}
else
{
const prev_pg_hashed = Object.keys(prev_weights).map(pg_name => pg_name.substr(3).split(/_/).reduce((a, c) => { a[c] = 1; return a; }, {}));
for (const pg of all_pgs)
{
if (!prev_weights['pg_'+pg.join('_')])
{
let max_int = 0;
for (const prev_hash in prev_pg_hashed)
{
const intersect_count = pg.reduce((a, osd) => a + (prev_hash[osd] ? 1 : 0), 0);
if (max_int < intersect_count)
{
max_int = intersect_count;
if (max_int >= pg_size)
{
break;
}
}
}
move_weights['pg_'+pg.join('_')] = pg_size-max_int;
}
}
}
return move_weights;
}
function add_valid_previous(osd_tree, prev_weights, all_pgs)
{
// Add previous combinations that are still valid
const hosts = Object.keys(osd_tree).sort();
const host_per_osd = {};
for (const host in osd_tree)
{
for (const osd in osd_tree[host])
{
host_per_osd[osd] = host;
}
}
skip_pg: for (const pg_name in prev_weights)
{
const seen_hosts = {};
const pg = pg_name.substr(3).split(/_/);
for (const osd of pg)
{
if (!host_per_osd[osd] || seen_hosts[host_per_osd[osd]])
{
continue skip_pg;
}
seen_hosts[host_per_osd[osd]] = true;
}
if (!all_pgs[pg_name])
{
all_pgs[pg_name] = pg;
}
}
}
// Try to minimize data movement
async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3, pg_minsize = 2, max_combinations = 10000, parity_space = 1 })
async function optimize_change(prev_int_pgs, osd_tree, max_combinations)
{
if (!osd_tree)
{
return null;
}
const pg_effsize = Math.min(pg_minsize, Object.keys(osd_tree).length)
+ Math.max(0, Math.min(pg_size, Object.keys(osd_tree).length) - pg_minsize) * parity_space;
max_combinations = max_combinations || 10000;
const pg_size = Math.min(Object.keys(osd_tree).length, 3);
const pg_count = prev_int_pgs.length;
const prev_weights = {};
const prev_pg_per_osd = {};
@ -241,55 +124,70 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
{
const pg_name = 'pg_'+pg.join('_');
prev_weights[pg_name] = (prev_weights[pg_name]||0) + 1;
for (let i = 0; i < pg.length; i++)
for (const osd of pg)
{
const osd = pg[i];
prev_pg_per_osd[osd] = prev_pg_per_osd[osd] || [];
prev_pg_per_osd[osd].push([ pg_name, (i >= pg_minsize ? parity_space : 1) ]);
prev_pg_per_osd[osd].push(pg_name);
}
}
// Get all combinations
let all_pgs = random_combinations(osd_tree, pg_size, max_combinations, parity_space > 1);
add_valid_previous(osd_tree, prev_weights, all_pgs);
all_pgs = Object.values(all_pgs);
let all_pgs = all_combinations(osd_tree, null, true);
if (all_pgs.length > max_combinations)
{
const intersecting = all_pgs.filter(pg => prev_weights['pg_'+pg.join('_')]);
if (intersecting.length > max_combinations)
{
const prob = max_combinations/intersecting.length;
all_pgs = intersecting.filter(pg => Math.random() < prob);
}
else
{
const prob = (max_combinations-intersecting.length)/all_pgs.length;
all_pgs = all_pgs.filter(pg => Math.random() < prob || prev_weights['pg_'+pg.join('_')]);
}
}
const pg_per_osd = {};
for (const pg of all_pgs)
{
const pg_name = 'pg_'+pg.join('_');
for (let i = 0; i < pg.length; i++)
for (const osd of pg)
{
const osd = pg[i];
pg_per_osd[osd] = pg_per_osd[osd] || [];
pg_per_osd[osd].push([ pg_name, (i >= pg_minsize ? parity_space : 1) ]);
pg_per_osd[osd].push(pg_name);
}
}
// Penalize PGs based on their similarity to old PGs
const move_weights = calc_intersect_weights(pg_size, pg_count, prev_weights, all_pgs);
const intersect = {};
for (const pg_name in prev_weights)
{
const pg = pg_name.substr(3).split(/_/);
intersect[pg[0]+'::'] = intersect[':'+pg[1]+':'] = intersect['::'+pg[2]] = 2;
intersect[pg[0]+'::'+pg[2]] = intersect[':'+pg[1]+':'+pg[2]] = intersect[pg[0]+':'+pg[1]+':'] = 1;
}
const move_weights = {};
for (const pg of all_pgs)
{
move_weights['pg_'+pg.join('_')] =
intersect[pg[0]+'::'+pg[2]] || intersect[':'+pg[1]+':'+pg[2]] || intersect[pg[0]+':'+pg[1]+':'] ||
intersect[pg[0]+'::'] || intersect[':'+pg[1]+':'] || intersect['::'+pg[2]] ||
3;
}
// Calculate total weight - old PG weights
const all_pg_names = all_pgs.map(pg => 'pg_'+pg.join('_'));
const all_pgs_hash = all_pg_names.reduce((a, c) => { a[c] = true; return a; }, {});
const all_weights = Object.assign({}, ...Object.values(osd_tree));
const total_weight = Object.values(all_weights).reduce((a, c) => Number(a) + Number(c), 0);
// Generate the LP problem
let lp = '';
lp += 'max: '+all_pg_names.map(pg_name => (
prev_weights[pg_name] ? `${pg_size+1}*add_${pg_name} - ${pg_size+1}*del_${pg_name}` : `${pg_size+1-move_weights[pg_name]}*${pg_name}`
prev_weights[pg_name] ? `${4-move_weights[pg_name]}*add_${pg_name} - 4*del_${pg_name}` : `${4-move_weights[pg_name]}*${pg_name}`
)).join(' + ')+';\n';
lp += all_pg_names
.map(pg_name => (prev_weights[pg_name] ? `add_${pg_name} - del_${pg_name}` : `${pg_name}`))
.join(' + ')+' = '+(pg_count
- Object.keys(prev_weights).reduce((a, old_pg_name) => (a + (all_pgs_hash[old_pg_name] ? prev_weights[old_pg_name] : 0)), 0)
)+';\n';
for (const osd in pg_per_osd)
{
if (osd !== NO_OSD)
{
const osd_sum = (pg_per_osd[osd]||[]).map(([ pg_name, space ]) => (
prev_weights[pg_name] ? `${space} * add_${pg_name} - ${space} * del_${pg_name}` : `${space} * ${pg_name}`
)).join(' + ');
const rm_osd_pg_count = (prev_pg_per_osd[osd]||[])
.reduce((a, [ old_pg_name, space ]) => (a + (all_pgs_hash[old_pg_name] ? space : 0)), 0);
const osd_pg_count = all_weights[osd]*pg_effsize/total_weight*pg_count - rm_osd_pg_count;
const osd_sum = (pg_per_osd[osd]||[]).map(pg_name => prev_weights[pg_name] ? `add_${pg_name} - del_${pg_name}` : pg_name).join(' + ');
const rm_osd_pg_count = (prev_pg_per_osd[osd]||[]).filter(old_pg_name => move_weights[old_pg_name]).length;
let osd_pg_count = all_weights[osd]*3/total_weight*pg_count - rm_osd_pg_count;
lp += osd_sum + ' <= ' + osd_pg_count + ';\n';
}
}
@ -323,7 +221,7 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
const weights = { ...prev_weights };
for (const k in prev_weights)
{
if (!all_pgs_hash[k])
if (!move_weights[k])
{
delete weights[k];
}
@ -338,7 +236,7 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
{
weights[k.substr(4)] = (weights[k.substr(4)] || 0) - Number(lp_result.vars[k]);
}
else if (k.substr(0, 3) === 'pg_')
else
{
weights[k] = Number(lp_result.vars[k]);
}
@ -360,7 +258,7 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
{
differs++;
}
for (let j = 0; j < pg_size; j++)
for (let j = 0; j < 3; j++)
{
if (new_pgs[i][j] != prev_int_pgs[i][j])
{
@ -375,7 +273,7 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
int_pgs: new_pgs,
differs,
osd_differs,
space: pg_effsize * pg_list_space_efficiency(new_pgs, all_weights, pg_minsize, parity_space),
space: pg_size * pg_list_space_efficiency(new_pgs, all_weights),
total_space: total_weight,
};
}
@ -493,112 +391,27 @@ function extract_osds(osd_tree, levels, osd_level, osds = {})
return osds;
}
// ordered = don't treat (x,y) and (y,x) as equal
function random_combinations(osd_tree, pg_size, count, ordered)
{
let seed = 0x5f020e43;
let rng = () =>
{
seed ^= seed << 13;
seed ^= seed >> 17;
seed ^= seed << 5;
return seed + 2147483648;
};
const hosts = Object.keys(osd_tree).sort();
const osds = Object.keys(osd_tree).reduce((a, c) => { a[c] = Object.keys(osd_tree[c]).sort(); return a; }, {});
const r = {};
// Generate random combinations including each OSD at least once
for (let h = 0; h < hosts.length; h++)
{
for (let o = 0; o < osds[hosts[h]].length; o++)
{
const pg = [ osds[hosts[h]][o] ];
const cur_hosts = [ ...hosts ];
cur_hosts.splice(h, 1);
for (let i = 1; i < pg_size && i < hosts.length; i++)
{
const next_host = rng() % cur_hosts.length;
const next_osd = rng() % osds[cur_hosts[next_host]].length;
pg.push(osds[cur_hosts[next_host]][next_osd]);
cur_hosts.splice(next_host, 1);
}
const cyclic_pgs = [ pg ];
if (ordered)
{
for (let i = 1; i < pg.size; i++)
{
cyclic_pgs.push([ ...pg.slice(i), ...pg.slice(0, i) ]);
}
}
for (const pg of cyclic_pgs)
{
while (pg.length < pg_size)
{
pg.push(NO_OSD);
}
r['pg_'+pg.join('_')] = pg;
}
}
}
// Generate purely random combinations
while (count > 0)
{
let host_idx = [];
const cur_hosts = [ ...hosts.map((h, i) => i) ];
const max_hosts = pg_size < hosts.length ? pg_size : hosts.length;
if (ordered)
{
for (let i = 0; i < max_hosts; i++)
{
const r = rng() % cur_hosts.length;
host_idx[i] = cur_hosts[r];
cur_hosts.splice(r, 1);
}
}
else
{
for (let i = 0; i < max_hosts; i++)
{
const r = rng() % (cur_hosts.length - (max_hosts - i - 1));
host_idx[i] = cur_hosts[r];
cur_hosts.splice(0, r+1);
}
}
let pg = host_idx.map(h => osds[hosts[h]][rng() % osds[hosts[h]].length]);
while (pg.length < pg_size)
{
pg.push(NO_OSD);
}
r['pg_'+pg.join('_')] = pg;
count--;
}
return r;
}
// Super-stupid algorithm. Given the current OSD tree, generate all possible OSD combinations
// FIXME: support different pg_sizes, not just 3
// osd_tree = { failure_domain1: { osd1: size1, ... }, ... }
// ordered = return combinations without duplicates having different order
function all_combinations(osd_tree, pg_size, ordered, count)
function all_combinations(osd_tree, count, ordered)
{
const hosts = Object.keys(osd_tree).sort();
const osds = Object.keys(osd_tree).reduce((a, c) => { a[c] = Object.keys(osd_tree[c]).sort(); return a; }, {});
while (hosts.length < pg_size)
while (hosts.length < 3)
{
osds[NO_OSD] = [ NO_OSD ];
hosts.push(NO_OSD);
}
let host_idx = [];
let osd_idx = [];
for (let i = 0; i < pg_size; i++)
{
host_idx.push(i);
osd_idx.push(0);
}
let host_idx = [ 0, 1, 2 ];
let osd_idx = [ 0, 0, 0 ];
const r = [];
while (!count || count < 0 || r.length < count)
{
let inc;
if (host_idx[2] != host_idx[1] && host_idx[2] != host_idx[0] && host_idx[1] != host_idx[0])
{
r.push(host_idx.map((hi, i) => osds[hosts[hi]][osd_idx[i]]));
let inc = pg_size-1;
inc = 2;
while (inc >= 0)
{
osd_idx[inc]++;
@ -612,39 +425,33 @@ function all_combinations(osd_tree, pg_size, ordered, count)
break;
}
}
if (inc < 0)
{
// no osds left in the current host combination, select the next one
inc = pg_size-1;
same_again: while (inc >= 0)
{
host_idx[inc]++;
for (let prev_host = 0; prev_host < inc; prev_host++)
{
if (host_idx[prev_host] == host_idx[inc])
{
continue same_again;
}
}
if (host_idx[inc] < (ordered ? hosts.length-(pg_size-1-inc) : hosts.length))
{
while ((++inc) < pg_size)
{
host_idx[inc] = (ordered ? host_idx[inc-1]+1 : 0);
}
break;
}
else
{
inc--;
}
inc = -1;
}
if (inc < 0)
{
// no osds left in current host combination, select the next one
osd_idx = [ 0, 0, 0 ];
host_idx[2]++;
if (host_idx[2] >= hosts.length)
{
host_idx[1]++;
host_idx[2] = ordered ? host_idx[1]+1 : 0;
if ((ordered ? host_idx[2] : host_idx[1]) >= hosts.length)
{
host_idx[0]++;
host_idx[1] = ordered ? host_idx[0]+1 : 0;
host_idx[2] = ordered ? host_idx[1]+1 : 0;
if ((ordered ? host_idx[2] : host_idx[0]) >= hosts.length)
{
break;
}
}
}
}
}
return r;
}
@ -661,15 +468,14 @@ function pg_weights_space_efficiency(weights, pg_count, osd_sizes)
return pg_per_osd_space_efficiency(per_osd, pg_count, osd_sizes);
}
function pg_list_space_efficiency(pgs, osd_sizes, pg_minsize, parity_space)
function pg_list_space_efficiency(pgs, osd_sizes)
{
const per_osd = {};
for (const pg of pgs)
{
for (let i = 0; i < pg.length; i++)
for (const osd of pg)
{
const osd = pg[i];
per_osd[osd] = (per_osd[osd]||0) + (i >= pg_minsize ? (parity_space||1) : 1);
per_osd[osd] = (per_osd[osd]||0) + 1;
}
}
return pg_per_osd_space_efficiency(per_osd, pgs.length, osd_sizes);
@ -711,6 +517,5 @@ module.exports = {
lp_solve,
make_int_pgs,
align_pgs,
random_combinations,
all_combinations,
};

7
mon/mon-main.js → lp/mon-main.js Executable file → Normal file
View File

@ -1,8 +1,5 @@
#!/usr/bin/node
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
const Mon = require('./mon.js');
const options = {};
@ -18,8 +15,8 @@ for (let i = 2; i < process.argv.length; i++)
if (!options.etcd_url)
{
console.error('USAGE: '+process.argv[0]+' '+process.argv[1]+' --etcd_url "http://127.0.0.1:2379,..." --etcd_prefix "/vitastor" --etcd_start_timeout 5 [--verbose 1]');
console.error('USAGE: '+process.argv[0]+' '+process.argv[1]+' --etcd_url "http://127.0.0.1:2379,..." --etcd_prefix "/rage" --etcd_start_timeout 5');
process.exit();
}
new Mon(options).start().catch(e => { console.error(e); process.exit(); });
new Mon(options).start();

858
lp/mon.js Normal file
View File

@ -0,0 +1,858 @@
const http = require('http');
const os = require('os');
const WebSocket = require('ws');
const LPOptimizer = require('./lp-optimizer.js');
const stableStringify = require('./stable-stringify.js');
class Mon
{
static etcd_tree = {
config: {
global: null,
/* placement_tree = {
levels: { datacenter: 1, rack: 2, host: 3, osd: 4, ... },
nodes: { host1: { level: 'host', parent: 'rack1' }, ... },
failure_domain: 'host',
} */
placement_tree: null,
osd: {},
pgs: {},
},
osd: {
state: {},
stats: {},
},
mon: {
master: null,
},
pg: {
change_stamp: null,
state: {},
stats: {},
history: {},
},
}
constructor(config)
{
// FIXME: Maybe prefer local etcd
this.etcd_urls = [];
for (let url of config.etcd_url.split(/,/))
{
let scheme = 'http';
url = url.trim().replace(/^(https?):\/\//, (m, m1) => { scheme = m1; return ''; });
if (!/\/[^\/]/.exec(url))
url += '/v3';
this.etcd_urls.push(scheme+'://'+url);
}
this.etcd_prefix = config.etcd_prefix || '/rage';
this.etcd_prefix = this.etcd_prefix.replace(/\/\/+/g, '/').replace(/^\/?(.*[^\/])\/?$/, '/$1');
this.etcd_start_timeout = (config.etcd_start_timeout || 5) * 1000;
this.state = JSON.parse(JSON.stringify(Mon.etcd_tree));
}
async start()
{
await this.load_config();
await this.get_lease();
await this.become_master();
await this.load_cluster_state();
await this.start_watcher();
await this.recheck_pgs();
}
async load_config()
{
const res = await this.etcd_call('/txn', { success: [
{ requestRange: { key: b64(this.etcd_prefix+'/config/global') } }
] }, this.etcd_start_timeout, -1);
this.parse_kv(res.responses[0].response_range.kvs[0]);
this.check_config();
}
check_config()
{
this.config.etcd_mon_timeout = Number(this.config.etcd_mon_timeout) || 0;
if (this.config.etcd_mon_timeout <= 0)
{
this.config.etcd_mon_timeout = 1000;
}
this.config.etcd_mon_retries = Number(this.config.etcd_mon_retries) || 5;
if (this.config.etcd_mon_retries < 0)
{
this.config.etcd_mon_retries = 0;
}
this.config.mon_change_timeout = Number(this.config.mon_change_timeout) || 1000;
if (this.config.mon_change_timeout < 100)
{
this.config.mon_change_timeout = 100;
}
this.config.mon_stats_timeout = Number(this.config.mon_stats_timeout) || 1000;
if (this.config.mon_stats_timeout < 100)
{
this.config.mon_stats_timeout = 100;
}
// After this number of seconds, a dead OSD will be removed from PG distribution
this.config.osd_out_time = Number(this.config.osd_out_time) || 0;
if (!this.config.osd_out_time)
{
this.config.osd_out_time = 30*60; // 30 minutes by default
}
this.config.max_osd_combinations = Number(this.config.max_osd_combinations) || 10000;
if (this.config.max_osd_combinations < 100)
{
this.config.max_osd_combinations = 100;
}
}
async start_watcher(retries)
{
let retry = 0;
if (retries >= 0 && retries < 1)
{
retries = 1;
}
while (retries < 0 || retry < retries)
{
const base = 'ws'+this.etcd_urls[Math.floor(Math.random()*this.etcd_urls.length)].substr(4);
const ok = await new Promise((ok, no) =>
{
const timer_id = setTimeout(() =>
{
this.ws.close();
ok(false);
}, timeout);
this.ws = new WebSocket(base+'/watch');
this.ws.on('open', () =>
{
if (timer_id)
clearTimeout(timer_id);
ok(true);
});
});
if (!ok)
{
this.ws = null;
}
retry++;
}
if (!this.ws)
{
this.die('Failed to open etcd watch websocket');
}
this.ws.send(JSON.stringify({
create_request: {
key: b64(this.etcd_prefix+'/'),
range_end: b64(this.etcd_prefix+'0'),
start_revision: ''+this.etcd_watch_revision,
watch_id: 1,
},
}));
this.ws.on('message', (msg) =>
{
let data;
try
{
data = JSON.parse(msg);
}
catch (e)
{
}
if (!data || !data.result || !data.result.events)
{
console.error('Garbage received from watch websocket: '+msg);
}
else
{
let stats_changed = false, changed = false;
console.log('Revision '+data.result.header.revision+' events: ');
for (const e of data.result.events)
{
this.parse_kv(e.kv);
const key = e.kv.key.substr(this.etcd_prefix.length);
if (key.substr(0, 11) == '/osd/stats/' || key.substr(0, 10) == '/pg/stats/')
{
stats_changed = true;
}
else if (key != '/stats')
{
changed = true;
}
console.log(e);
}
if (stats_changed)
{
this.schedule_update_stats();
}
if (changed)
{
this.schedule_recheck();
}
}
});
}
async get_lease()
{
const max_ttl = this.config.etcd_mon_ttl + this.config.etcd_mon_timeout/1000*this.config.etcd_mon_retries;
const res = await this.etcd_call('/lease/grant', { TTL: max_ttl }, this.config.etcd_mon_timeout, this.config.etcd_mon_retries);
this.etcd_lease_id = res.ID;
setInterval(async () =>
{
const res = await this.etcd_call('/lease/keepalive', { ID: this.etcd_lease_id }, this.config.etcd_mon_timeout, this.config.etcd_mon_retries);
if (!res.result.TTL)
{
this.die('Lease expired');
}
}, config.etcd_mon_timeout);
}
async become_master()
{
const state = { ip: this.local_ips() };
while (1)
{
const res = await this.etcd_call('/txn', {
compare: [ { target: 'CREATE', create_revision: 0, key: b64(this.etcd_prefix+'/mon/master') } ],
success: [ { key: b64(this.etcd_prefix+'/mon/master'), value: b64(JSON.stringify(state)), lease: ''+this.etcd_lease_id } ],
}, this.etcd_start_timeout, 0);
if (!res.succeeded)
{
await new Promise(ok => setTimeout(ok, this.etcd_start_timeout));
}
}
}
async load_cluster_state()
{
const res = await this.etcd_call('/txn', { success: [
{ requestRange: { key: b64(this.etcd_prefix+'/'), range_end: b64(this.etcd_prefix+'0') } },
] }, this.etcd_start_timeout, -1);
this.etcd_watch_revision = BigInt(res.header.revision)+BigInt(1);
const data = JSON.parse(JSON.stringify(Mon.etcd_tree));
for (const response of res.responses)
{
for (const kv of response.response_range.kvs)
{
this.parse_kv(kv);
}
}
this.state = data;
}
all_osds()
{
return Object.keys(this.state.osd.stats);
}
get_osd_tree()
{
this.state.config.placement_tree = this.state.config.placement_tree||{};
const levels = this.state.config.placement_tree.levels||{};
levels.host = levels.host || 100;
levels.osd = levels.osd || 101;
const tree = { '': { children: [] } };
for (const node_id in this.state.config.placement_tree.nodes||{})
{
const node_cfg = this.state.config.placement_tree.nodes[node_id];
if (!node_id || /^\d/.exec(node_id) ||
!node_cfg.level || !levels[node_cfg.level])
{
// All nodes must have non-empty non-numeric IDs and valid levels
continue;
}
tree[node_id] = { id: node_id, level: node_cfg.level, parent: node_cfg.parent, children: [] };
}
// This requires monitor system time to be in sync with OSD system times (at least to some extent)
const down_time = Date.now()/1000 - this.config.osd_out_time;
for (const osd_num of this.all_osds().sort((a, b) => a - b))
{
const stat = this.state.osd.stats[osd_num];
if (stat.size && (this.state.osd.state[osd_num] || Number(stat.time) >= down_time))
{
// Numeric IDs are reserved for OSDs
const reweight = this.state.config.osd[osd_num] && Number(this.state.config.osd[osd_num].reweight) || 1;
tree[osd_num] = tree[osd_num] || { id: osd_num, parent: stat.host };
tree[osd_num].level = 'osd';
tree[osd_num].size = reweight * stat.size / 1024 / 1024 / 1024 / 1024; // terabytes
delete tree[osd_num].children;
}
}
for (const node_id in tree)
{
if (node_id === '')
{
continue;
}
const node_cfg = tree[node_id];
const node_level = levels[node_cfg.level] || node_cfg.level;
let parent_level = node_cfg.parent && tree[node_cfg.parent] && tree[node_cfg.parent].children
&& tree[node_cfg.parent].level;
parent_level = parent_level ? (levels[parent_level] || parent_level) : null;
// Parent's level must be less than child's; OSDs must be leaves
const parent = parent_level && parent_level < node_level ? tree[node_cfg.parent] : '';
tree[parent].children.push(tree[node_id]);
delete node_cfg.parent;
}
return LPOptimizer.flatten_tree(tree[''].children, levels, this.state.config.failure_domain, 'osd');
}
async stop_all_pgs()
{
let has_online = false, paused = true;
for (const pg in this.state.config.pgs.items||{})
{
const cur_state = ((this.state.pg.state[pg]||{}).state||[]).join(',');
if (cur_state != '' && cur_state != 'offline')
{
has_online = true;
}
if (!this.state.config.pgs.items[pg].pause)
{
paused = false;
}
}
if (!paused)
{
console.log('Stopping all PGs before changing PG count');
const new_cfg = JSON.parse(JSON.stringify(this.state.config.pgs));
for (const pg in new_cfg.items)
{
new_cfg.items[pg].pause = true;
}
// Check that no OSDs change their state before we pause PGs
// Doing this we make sure that OSDs don't wake up in the middle of our "transaction"
// and can't see the old PG configuration
const checks = [];
for (const osd_num of this.all_osds())
{
const key = b64(this.etcd_prefix+'/osd/state/'+osd_num);
checks.push({ key, target: 'MOD', result: 'LESS', mod_revision: ''+this.etcd_watch_revision });
}
const res = await this.etcd_call('/txn', {
compare: [
{ key: b64(this.etcd_prefix+'/mon/master'), target: 'LEASE', lease: ''+this.etcd_lease_id },
{ key: b64(this.etcd_prefix+'/config/pgs'), target: 'MOD', mod_revision: ''+this.etcd_watch_revision, result: 'LESS' },
...checks,
],
success: [
{ requestPut: { key: b64(this.etcd_prefix+'/config/pgs'), value: b64(JSON.stringify(new_cfg)) } },
],
}, this.config.etcd_mon_timeout, 0);
if (!res.succeeded)
{
return false;
}
this.state.config.pgs = new_cfg;
}
return !has_online;
}
scale_pg_count(prev_pgs, pg_history, new_pg_count)
{
const old_pg_count = prev_pgs.length;
// Add all possibly intersecting PGs into the history of new PGs
if (!(new_pg_count % old_pg_count))
{
// New PG count is a multiple of the old PG count
const mul = (new_pg_count / old_pg_count);
for (let i = 0; i < new_pg_count; i++)
{
const old_i = Math.floor(new_pg_count / mul);
pg_history[i] = JSON.parse(JSON.stringify(this.state.pg.history[1+old_i]));
}
}
else if (!(old_pg_count % new_pg_count))
{
// Old PG count is a multiple of the new PG count
const mul = (old_pg_count / new_pg_count);
for (let i = 0; i < new_pg_count; i++)
{
pg_history[i] = {
osd_sets: [],
all_peers: [],
};
for (let j = 0; j < mul; j++)
{
pg_history[i].osd_sets.push(prev_pgs[i*mul]);
const hist = this.state.pg.history[1+i*mul+j];
if (hist && hist.osd_sets && hist.osd_sets.length)
{
Array.prototype.push.apply(pg_history[i].osd_sets, hist.osd_sets);
}
if (hist && hist.all_peers && hist.all_peers.length)
{
Array.prototype.push.apply(pg_history[i].all_peers, hist.all_peers);
}
}
}
}
else
{
// Any PG may intersect with any PG after non-multiple PG count change
// So, merge ALL PGs history
let all_sets = {};
let all_peers = {};
for (const pg of prev_pgs)
{
all_sets[pg.join(' ')] = pg;
}
for (const pg in this.state.pg.history)
{
const hist = this.state.pg.history[pg];
if (hist && hist.osd_sets)
{
for (const pg of hist.osd_sets)
{
all_sets[pg.join(' ')] = pg;
}
}
if (hist && hist.all_peers)
{
for (const osd_num of hist.all_peers)
{
all_peers[osd_num] = Number(osd_num);
}
}
}
all_sets = Object.values(all_sets);
all_peers = Object.values(all_peers);
for (let i = 0; i < new_pg_count; i++)
{
pg_history[i] = { osd_sets: all_sets, all_peers };
}
}
// Mark history keys for removed PGs as removed
for (let i = new_pg_count; i < old_pg_count; i++)
{
pg_history[i] = null;
}
if (old_pg_count < new_pg_count)
{
for (let i = new_pg_count-1; i >= 0; i--)
{
prev_pgs[i] = prev_pgs[Math.floor(i/new_pg_count*old_pg_count)];
}
}
else if (old_pg_count > new_pg_count)
{
for (let i = 0; i < new_pg_count; i++)
{
prev_pgs[i] = prev_pgs[Math.round(i/new_pg_count*old_pg_count)];
}
prev_pgs.splice(new_pg_count, old_pg_count-new_pg_count);
}
}
async save_new_pgs(prev_pgs, new_pgs, pg_history, tree_hash)
{
const txn = [], checks = [];
const pg_items = {};
new_pgs.map((osd_set, i) =>
{
osd_set = osd_set.map(osd_num => osd_num === LPOptimizer.NO_OSD ? 0 : osd_num);
const alive_set = osd_set.filter(osd_num => osd_num);
pg_items[i+1] = {
osd_set,
primary: alive_set.length ? alive_set[Math.floor(Math.random()*alive_set.length)] : 0,
};
if (prev_pgs[i] && prev_pgs[i].join(' ') != osd_set.join(' '))
{
pg_history[i] = pg_history[i] || {};
pg_history[i].osd_sets = pg_history[i].osd_sets || [];
pg_history[i].osd_sets.push(prev_pgs[i]);
}
});
for (let i = 0; i < new_pgs.length || i < prev_pgs.length; i++)
{
checks.push({
key: b64(this.etcd_prefix+'/pg/history/'+(i+1)),
target: 'MOD',
mod_revision: ''+this.etcd_watch_revision,
result: 'LESS',
});
if (pg_history[i])
{
txn.push({
requestPut: {
key: b64(this.etcd_prefix+'/pg/history/'+(i+1)),
value: b64(JSON.stringify(pg_history[i])),
},
});
}
else
{
txn.push({
requestDeleteRange: {
key: b64(this.etcd_prefix+'/pg/history/'+(i+1)),
},
});
}
}
this.state.config.pgs = {
hash: tree_hash,
items: pg_items,
};
const res = await this.etcd_call('/txn', {
compare: [
{ key: b64(this.etcd_prefix+'/mon/master'), target: 'LEASE', lease: ''+this.etcd_lease_id },
{ key: b64(this.etcd_prefix+'/config/pgs'), target: 'MOD', mod_revision: ''+this.etcd_watch_revision, result: 'LESS' },
...checks,
],
success: [
{ requestPut: { key: b64(this.etcd_prefix+'/config/pgs'), value: b64(JSON.stringify(this.state.config.pgs)) } },
...txn,
],
}, this.config.etcd_mon_timeout, 0);
return res.succeeded;
}
async recheck_pgs()
{
// Take configuration and state, check it against the stored configuration hash
// Recalculate PGs and save them to etcd if the configuration is changed
const tree_cfg = {
osd_tree: this.get_osd_tree(),
pg_count: this.config.pg_count || Object.keys(this.state.config.pgs.items||{}).length || 128,
max_osd_combinations: this.config.max_osd_combinations,
};
const tree_hash = sha1hex(stableStringify(tree_cfg));
if (this.state.config.pgs.hash != tree_hash)
{
// Something has changed
const prev_pgs = [];
for (const pg in this.state.config.pgs.items||{})
{
prev_pgs[pg-1] = this.state.config.pgs.items[pg].osd_set;
}
const pg_history = [];
const old_pg_count = prev_pgs.length;
let optimize_result;
if (old_pg_count > 0)
{
if (old_pg_count != tree_cfg.pg_count)
{
// PG count changed. Need to bring all PGs down.
if (!await this.stop_all_pgs())
{
this.schedule_recheck();
return;
}
this.scale_pg_count(prev_pgs, pg_history, new_pg_count);
}
optimize_result = await LPOptimizer.optimize_change(prev_pgs, tree_cfg.osd_tree, tree_cfg.max_osd_combinations);
}
else
{
optimize_result = await LPOptimizer.optimize_initial(tree_cfg.osd_tree, tree_cfg.pg_count, tree_cfg.max_osd_combinations);
}
if (!await this.save_new_pgs(prev_pgs, optimize_result.int_pgs, pg_history, tree_hash))
{
console.log('Someone changed PG configuration while we also tried to change it. Retrying in '+this.config.mon_change_timeout+' ms');
this.schedule_recheck();
return;
}
console.log('PG configuration successfully changed');
if (old_pg_count != optimize_result.int_pgs.length)
{
console.log(`PG count changed from: ${old_pg_count} to ${optimize_result.int_pgs.length}`);
}
LPOptimizer.print_change_stats(optimize_result);
}
}
schedule_recheck()
{
if (this.recheck_timer)
{
clearTimeout(this.recheck_timer);
this.recheck_timer = null;
}
this.recheck_timer = setTimeout(() =>
{
this.recheck_timer = null;
this.recheck_pgs().catch(console.error);
}, this.config.mon_change_timeout || 1000);
}
sum_stats()
{
let overflow = false;
this.prev_stats = this.prev_stats || { op_stats: {}, subop_stats: {}, recovery_stats: {} };
const op_stats = {}, subop_stats = {}, recovery_stats = {};
for (const osd in this.state.osd.stats)
{
const st = this.state.osd.stats[osd];
for (const op in st.op_stats||{})
{
op_stats[op] = op_stats[op] || { count: 0n, usec: 0n, bytes: 0n };
op_stats[op].count += BigInt(st.op_stats.count||0);
op_stats[op].usec += BigInt(st.op_stats.usec||0);
op_stats[op].bytes += BigInt(st.op_stats.bytes||0);
}
for (const op in st.subop_stats||{})
{
subop_stats[op] = subop_stats[op] || { count: 0n, usec: 0n };
subop_stats[op].count += BigInt(st.subop_stats.count||0);
subop_stats[op].usec += BigInt(st.subop_stats.usec||0);
}
for (const op in st.recovery_stats||{})
{
recovery_stats[op] = recovery_stats[op] || { count: 0n, bytes: 0n };
recovery_stats[op].count += BigInt(st.recovery_stats.count||0);
recovery_stats[op].bytes += BigInt(st.recovery_stats.bytes||0);
}
}
for (const op in op_stats)
{
if (op_stats[op].count >= 0x10000000000000000n)
{
if (!this.prev_stats.op_stats[op])
{
overflow = true;
}
else
{
op_stats[op].count -= this.prev_stats.op_stats[op].count;
op_stats[op].usec -= this.prev_stats.op_stats[op].usec;
op_stats[op].bytes -= this.prev_stats.op_stats[op].bytes;
}
}
}
for (const op in subop_stats)
{
if (subop_stats[op].count >= 0x10000000000000000n)
{
if (!this.prev_stats.subop_stats[op])
{
overflow = true;
}
else
{
subop_stats[op].count -= this.prev_stats.subop_stats[op].count;
subop_stats[op].usec -= this.prev_stats.subop_stats[op].usec;
}
}
}
for (const op in recovery_stats)
{
if (recovery_stats[op].count >= 0x10000000000000000n)
{
if (!this.prev_stats.recovery_stats[op])
{
overflow = true;
}
else
{
recovery_stats[op].count -= this.prev_stats.recovery_stats[op].count;
recovery_stats[op].bytes -= this.prev_stats.recovery_stats[op].bytes;
}
}
}
const object_counts = { object: 0n, clean: 0n, misplaced: 0n, degraded: 0n, incomplete: 0n };
for (const pg_num in this.state.pg.stats)
{
const st = this.state.pg.stats[pg_num];
for (const k in object_counts)
{
if (st[k+'_count'])
{
object_counts[k] += BigInt(st[k+'_count']);
}
}
}
return (this.prev_stats = { overflow, op_stats, subop_stats, recovery_stats, object_counts });
}
async update_total_stats()
{
const stats = this.sum_stats();
if (!stats.overflow)
{
// Convert to strings, serialize and save
const ser = {};
for (const st of [ 'op_stats', 'subop_stats', 'recovery_stats' ])
{
ser[st] = {};
for (const op in stats[st])
{
ser[st][op] = {};
for (const k in stats[st][op])
{
ser[st][op][k] = ''+stats[st][op][k];
}
}
}
ser.object_counts = {};
for (const k in stats.object_counts)
{
ser.object_counts[k] = ''+stats.object_counts[k];
}
await this.etcd_call('/txn', {
success: [ { requestPut: { key: b64(this.etcd_prefix+'/stats'), value: b64(JSON.stringify(ser)) } } ],
}, this.config.etcd_mon_timeout, 0);
}
}
schedule_update_stats()
{
if (this.stats_timer)
{
clearTimeout(this.stats_timer);
this.stats_timer = null;
}
this.stats_timer = setTimeout(() =>
{
this.stats_timer = null;
this.update_total_stats().catch(console.error);
}, this.config.mon_stats_timeout || 1000);
}
parse_kv(kv)
{
if (!kv || !kv.key)
{
return;
}
kv.key = de64(kv.key);
kv.value = kv.value ? JSON.parse(de64(kv.value)) : null;
const key = kv.key.substr(this.etcd_prefix.length).replace(/^\/+/, '').split('/');
const cur = this.state, orig = Mon.etcd_tree;
for (let i = 0; i < key.length-1; i++)
{
if (!orig[key[i]])
{
console.log('Bad key in etcd: '+kv.key+' = '+kv.value);
return;
}
orig = orig[key[i]];
cur = (cur[key[i]] = cur[key[i]] || {});
}
if (orig[key.length-1])
{
console.log('Bad key in etcd: '+kv.key+' = '+kv.value);
return;
}
cur[key[key.length-1]] = kv.value;
if (key.join('/') === 'config/global')
{
this.state.config.global = this.state.config.global || {};
this.config = this.state.config.global;
this.check_config();
}
}
async etcd_call(path, body, timeout, retries)
{
let retry = 0;
if (retries >= 0 && retries < 1)
{
retries = 1;
}
while (retries < 0 || retry < retries)
{
const base = this.etcd_urls[Math.floor(Math.random()*this.etcd_urls.length)];
const res = await POST(base+path, body, timeout);
if (res.json)
{
if (res.json.error)
{
console.log('etcd returned error: '+res.json.error);
break;
}
return res.json;
}
retry++;
}
this.die();
}
die(err)
{
// In fact we can just try to rejoin
console.fatal(err || 'Cluster connection failed');
process.exit(1);
}
local_ips()
{
const ips = [];
const ifaces = os.networkInterfaces();
for (const ifname in ifaces)
{
for (const iface of ifaces[ifname])
{
if (iface.family == 'IPv4' && !iface.internal)
{
ips.push(iface.address);
}
}
}
return ips;
}
}
function POST(url, body, timeout)
{
return new Promise((ok, no) =>
{
const body_text = Buffer.from(JSON.stringify(body));
let timer_id = timeout > 0 ? setTimeout(() =>
{
if (req)
req.abort();
req = null;
ok({ error: 'timeout' });
}, timeout) : null;
let req = http.request(url, { method: 'POST', headers: {
'Content-Type': 'application/json',
'Content-Length': body_text,
} }, (res) =>
{
if (!req)
{
return;
}
clearTimeout(timer_id);
if (res.statusCode != 200)
{
ok({ error: res.statusCode, response: res });
return;
}
let res_body = '';
res.setEncoding('utf8');
res.on('data', chunk => { res_body += chunk });
res.on('end', () =>
{
try
{
res_body = JSON.parse(res_body);
ok({ response: res, json: res_body });
}
catch (e)
{
ok({ error: e, response: res, body: res_body });
}
});
});
req.write(body_text);
req.end();
});
}
function b64(str)
{
return Buffer.from(str).toString('base64');
}
function de64(str)
{
return Buffer.from(str, 'base64').toString();
}
function sha1hex(str)
{
const hash = crypto.createHash('sha1');
hash.update(str);
return hash.digest('hex');
}

View File

@ -1,15 +1,14 @@
{
"name": "vitastor-mon",
"name": "rage-mon",
"version": "1.0.0",
"description": "Vitastor SDS monitor service",
"main": "mon-main.js",
"description": "RAGE storage monitor service",
"main": "mon.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "Vitaliy Filippov",
"license": "UNLICENSED",
"dependencies": {
"sprintf-js": "^1.1.2",
"ws": "^7.2.5"
}
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
const LPOptimizer = require('./lp-optimizer.js');
const crush_tree = [
@ -43,31 +40,31 @@ async function run()
{
const cur_tree = {};
console.log('Empty tree:');
let res = await LPOptimizer.optimize_initial({ osd_tree: cur_tree, pg_size: 3, pg_count: 256 });
let res = await LPOptimizer.optimize_initial(cur_tree, 256);
LPOptimizer.print_change_stats(res, false);
console.log('\nAdding 1st failure domain:');
cur_tree['dom1'] = osd_tree['dom1'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: cur_tree, pg_size: 3 });
res = await LPOptimizer.optimize_change(res.int_pgs, cur_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\nAdding 2nd failure domain:');
cur_tree['dom2'] = osd_tree['dom2'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: cur_tree, pg_size: 3 });
res = await LPOptimizer.optimize_change(res.int_pgs, cur_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\nAdding 3rd failure domain:');
cur_tree['dom3'] = osd_tree['dom3'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: cur_tree, pg_size: 3 });
res = await LPOptimizer.optimize_change(res.int_pgs, cur_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\nRemoving 3rd failure domain:');
delete cur_tree['dom3'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: cur_tree, pg_size: 3 });
res = await LPOptimizer.optimize_change(res.int_pgs, cur_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\nRemoving 2nd failure domain:');
delete cur_tree['dom2'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: cur_tree, pg_size: 3 });
res = await LPOptimizer.optimize_change(res.int_pgs, cur_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\nRemoving 1st failure domain:');
delete cur_tree['dom1'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree: cur_tree, pg_size: 3 });
res = await LPOptimizer.optimize_change(res.int_pgs, cur_tree);
LPOptimizer.print_change_stats(res, false);
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
const LPOptimizer = require('./lp-optimizer.js');
const osd_tree = {
@ -78,37 +75,19 @@ const crush_tree = [
async function run()
{
let res;
// Test: add 1 OSD of almost the same size. Ideal data movement could be 1/12 = 8.33%. Actual is ~13%
// Space efficiency is ~99% in all cases.
console.log('256 PGs, size=2');
res = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 2, pg_count: 256 });
// Space efficiency is ~99.5% in both cases.
let res = await LPOptimizer.optimize_initial(osd_tree, 256);
LPOptimizer.print_change_stats(res, false);
console.log('\nAdding osd.8');
console.log('adding osd.8');
osd_tree[500][8] = 3.58589;
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 2 });
res = await LPOptimizer.optimize_change(res.int_pgs, osd_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\nRemoving osd.8');
console.log('removing osd.8');
delete osd_tree[500][8];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 2 });
res = await LPOptimizer.optimize_change(res.int_pgs, osd_tree);
LPOptimizer.print_change_stats(res, false);
console.log('\n256 PGs, size=3');
res = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 3, pg_count: 256 });
LPOptimizer.print_change_stats(res, false);
console.log('\nAdding osd.8');
osd_tree[500][8] = 3.58589;
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 3 });
LPOptimizer.print_change_stats(res, false);
console.log('\nRemoving osd.8');
delete osd_tree[500][8];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 3 });
LPOptimizer.print_change_stats(res, false);
console.log('\n256 PGs, size=3, failure domain=rack');
res = await LPOptimizer.optimize_initial({ osd_tree: LPOptimizer.flatten_tree(crush_tree, {}, 1, 3), pg_size: 3, pg_count: 256 });
res = await LPOptimizer.optimize_initial(LPOptimizer.flatten_tree(crush_tree, {}, 1, 3), 256);
LPOptimizer.print_change_stats(res, false);
}

View File

@ -1,104 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
module.exports = {
scale_pg_count,
};
function add_pg_history(new_pg_history, new_pg, prev_pgs, prev_pg_history, old_pg)
{
if (!new_pg_history[new_pg])
{
new_pg_history[new_pg] = {
osd_sets: {},
all_peers: {},
epoch: 0,
};
}
const nh = new_pg_history[new_pg], oh = prev_pg_history[old_pg];
nh.osd_sets[prev_pgs[old_pg].join(' ')] = prev_pgs[old_pg];
if (oh && oh.osd_sets && oh.osd_sets.length)
{
for (const pg of oh.osd_sets)
{
nh.osd_sets[pg.join(' ')] = pg;
}
}
if (oh && oh.all_peers && oh.all_peers.length)
{
for (const osd_num of oh.all_peers)
{
nh.all_peers[osd_num] = Number(osd_num);
}
}
if (oh && oh.epoch)
{
nh.epoch = nh.epoch < oh.epoch ? oh.epoch : nh.epoch;
}
}
function finish_pg_history(merged_history)
{
merged_history.osd_sets = Object.values(merged_history.osd_sets);
merged_history.all_peers = Object.values(merged_history.all_peers);
}
function scale_pg_count(prev_pgs, prev_pg_history, new_pg_history, new_pg_count)
{
const old_pg_count = prev_pgs.length;
// Add all possibly intersecting PGs to the history of new PGs
if (!(new_pg_count % old_pg_count))
{
// New PG count is a multiple of old PG count
for (let i = 0; i < new_pg_count; i++)
{
add_pg_history(new_pg_history, i, prev_pgs, prev_pg_history, i % old_pg_count);
finish_pg_history(new_pg_history[i]);
}
}
else if (!(old_pg_count % new_pg_count))
{
// Old PG count is a multiple of the new PG count
const mul = (old_pg_count / new_pg_count);
for (let i = 0; i < new_pg_count; i++)
{
for (let j = 0; j < mul; j++)
{
add_pg_history(new_pg_history, i, prev_pgs, prev_pg_history, i+j*new_pg_count);
}
finish_pg_history(new_pg_history[i]);
}
}
else
{
// Any PG may intersect with any PG after non-multiple PG count change
// So, merge ALL PGs history
let merged_history = {};
for (let i = 0; i < old_pg_count; i++)
{
add_pg_history(merged_history, 1, prev_pgs, prev_pg_history, i);
}
finish_pg_history(merged_history[1]);
for (let i = 0; i < new_pg_count; i++)
{
new_pg_history[i] = { ...merged_history[1] };
}
}
// Mark history keys for removed PGs as removed
for (let i = new_pg_count; i < old_pg_count; i++)
{
new_pg_history[i] = null;
}
// Just for the lp_solve optimizer - pick a "previous" PG for each "new" one
if (old_pg_count < new_pg_count)
{
for (let i = old_pg_count; i < new_pg_count; i++)
{
prev_pgs[i] = prev_pgs[i % old_pg_count];
}
}
else if (old_pg_count > new_pg_count)
{
prev_pgs.splice(new_pg_count, old_pg_count-new_pg_count);
}
}

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@ -1,89 +0,0 @@
// Functions to calculate Annualized Failure Rate of your cluster
// if you know AFR of your drives, number of drives, expected rebalance time
// and replication factor
// License: VNPL-1.1 (see https://yourcmc.ru/git/vitalif/vitastor/src/branch/master/README.md for details) or AGPL-3.0
// Author: Vitaliy Filippov, 2020+
module.exports = {
cluster_afr_fullmesh,
failure_rate_fullmesh,
cluster_afr,
c_n_k,
};
/******** "FULL MESH": ASSUME EACH OSD COMMUNICATES WITH ALL OTHER OSDS ********/
// Estimate AFR of the cluster
// n - number of drives
// afr - annualized failure rate of a single drive
// l - expected rebalance time in days after a single drive failure
// k - replication factor / number of drives that must fail at the same time for the cluster to fail
function cluster_afr_fullmesh(n, afr, l, k)
{
return 1 - (1 - afr * failure_rate_fullmesh(n-(k-1), afr*l/365, k-1)) ** (n-(k-1));
}
// Probability of at least <f> failures in a cluster with <n> drives with AFR=<a>
function failure_rate_fullmesh(n, a, f)
{
if (f <= 0)
{
return (1-a)**n;
}
let p = 1;
for (let i = 0; i < f; i++)
{
p -= c_n_k(n, i) * (1-a)**(n-i) * a**i;
}
return p;
}
/******** PGS: EACH OSD ONLY COMMUNICATES WITH <pgs> OTHER OSDs ********/
// <n> hosts of <m> drives of <capacity> GB, each able to backfill at <speed> GB/s,
// <k> replicas, <pgs> unique peer PGs per OSD (~50 for 100 PG-per-OSD in a big cluster)
//
// For each of n*m drives: P(drive fails in a year) * P(any of its peers fail in <l*365> next days).
// More peers per OSD increase rebalance speed (more drives work together to resilver) if you
// let them finish rebalance BEFORE replacing the failed drive (degraded_replacement=false).
// At the same time, more peers per OSD increase probability of any of them to fail!
// osd_rm=true means that failed OSDs' data is rebalanced over all other hosts,
// not over the same host as it's in Ceph by default (dead OSDs are marked 'out').
//
// Probability of all except one drives in a replica group to fail is (AFR^(k-1)).
// So with <x> PGs it becomes ~ (x * (AFR*L/365)^(k-1)). Interesting but reasonable consequence
// is that, with k=2, total failure rate doesn't depend on number of peers per OSD,
// because it gets increased linearly by increased number of peers to fail
// and decreased linearly by reduced rebalance time.
function cluster_afr({ n_hosts, n_drives, afr_drive, afr_host, capacity, speed, ec, ec_data, ec_parity, replicas, pgs = 1, osd_rm, degraded_replacement, down_out_interval = 600 })
{
const pg_size = (ec ? ec_data+ec_parity : replicas);
pgs = Math.min(pgs, (n_hosts-1)*n_drives/(pg_size-1));
const host_pgs = Math.min(pgs*n_drives, (n_hosts-1)*n_drives/(pg_size-1));
const resilver_disk = n_drives == 1 || osd_rm ? pgs : (n_drives-1);
const disk_heal_time = (down_out_interval + capacity/(degraded_replacement ? 1 : resilver_disk)/speed)/86400/365;
const host_heal_time = (down_out_interval + n_drives*capacity/pgs/speed)/86400/365;
const disk_heal_fail = ((afr_drive+afr_host/n_drives)*disk_heal_time);
const host_heal_fail = ((afr_drive+afr_host/n_drives)*host_heal_time);
const disk_pg_fail = ec
? failure_rate_fullmesh(ec_data+ec_parity-1, disk_heal_fail, ec_parity)
: disk_heal_fail**(replicas-1);
const host_pg_fail = ec
? failure_rate_fullmesh(ec_data+ec_parity-1, host_heal_fail, ec_parity)
: host_heal_fail**(replicas-1);
return 1 - ((1 - afr_drive * (1-(1-disk_pg_fail)**pgs)) ** (n_hosts*n_drives))
* ((1 - afr_host * (1-(1-host_pg_fail)**host_pgs)) ** n_hosts);
}
/******** UTILITY ********/
// Combination count
function c_n_k(n, k)
{
let r = 1;
for (let i = 0; i < k; i++)
{
r *= (n-i) / (i+1);
}
return r;
}

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@ -1,28 +0,0 @@
const { sprintf } = require('sprintf-js');
const { cluster_afr } = require('./afr.js');
print_cluster_afr({ n_hosts: 4, n_drives: 6, afr_drive: 0.03, afr_host: 0.05, capacity: 4000, speed: 0.1, replicas: 2 });
print_cluster_afr({ n_hosts: 4, n_drives: 3, afr_drive: 0.03, afr_host: 0, capacity: 4000, speed: 0.1, replicas: 2 });
print_cluster_afr({ n_hosts: 4, n_drives: 3, afr_drive: 0.03, afr_host: 0.05, capacity: 4000, speed: 0.1, replicas: 2 });
print_cluster_afr({ n_hosts: 4, n_drives: 3, afr_drive: 0.03, afr_host: 0, capacity: 4000, speed: 0.1, ec: true, ec_data: 2, ec_parity: 1 });
print_cluster_afr({ n_hosts: 4, n_drives: 3, afr_drive: 0.03, afr_host: 0.05, capacity: 4000, speed: 0.1, ec: true, ec_data: 2, ec_parity: 1 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0, capacity: 8000, speed: 0.02, replicas: 2 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0.05, capacity: 8000, speed: 0.02, replicas: 2 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0, capacity: 8000, speed: 0.02, replicas: 3 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0.05, capacity: 8000, speed: 0.02, replicas: 3 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0, capacity: 8000, speed: 0.02, replicas: 3, pgs: 100 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0.05, capacity: 8000, speed: 0.02, replicas: 3, pgs: 100 });
print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, afr_host: 0.05, capacity: 8000, speed: 0.02, replicas: 3, pgs: 100, degraded_replacement: 1 });
function print_cluster_afr(config)
{
console.log(
`${config.n_hosts} nodes with ${config.n_drives} ${sprintf("%.1f", config.capacity/1000)}TB drives`+
`, capable to backfill at ${sprintf("%.1f", config.speed*1000)} MB/s, drive AFR ${sprintf("%.1f", config.afr_drive*100)}%`+
(config.afr_host ? `, host AFR ${sprintf("%.1f", config.afr_host*100)}%` : '')+
(config.ec ? `, EC ${config.ec_data}+${config.ec_parity}` : `, ${config.replicas} replicas`)+
`, ${config.pgs||1} PG per OSD`+
(config.degraded_replacement ? `\n...and you don't let the rebalance finish before replacing drives` : '')
);
console.log('-> '+sprintf("%.7f%%", 100*cluster_afr(config))+'\n');
}

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@ -1,76 +0,0 @@
#!/bin/bash
# Very simple systemd unit generator for vitastor-osd services
# Not the final solution yet, mostly for tests
# Copyright (c) Vitaliy Filippov, 2019+
# License: MIT
# USAGE: ./make-osd.sh /dev/disk/by-partuuid/xxx [ /dev/disk/by-partuuid/yyy]...
IP_SUBSTR="10.200.1."
ETCD_HOSTS="etcd0=http://10.200.1.10:2380,etcd1=http://10.200.1.11:2380,etcd2=http://10.200.1.12:2380"
set -e -x
IP=`ip -json a s | jq -r '.[].addr_info[] | select(.local | startswith("'$IP_SUBSTR'")) | .local'`
[ "$IP" != "" ] || exit 1
ETCD_MON=$(echo $ETCD_HOSTS | perl -pe 's/:2380/:2379/g; s/etcd\d*=//g;')
D=`dirname $0`
# Create OSDs on all passed devices
OSD_NUM=1
for DEV in $*; do
# Ugly :) -> node.js rework pending
while true; do
ST=$(etcdctl --endpoints="$ETCD_MON" get --print-value-only /vitastor/osd/stats/$OSD_NUM)
if [ "$ST" = "" ]; then
break
fi
OSD_NUM=$((OSD_NUM+1))
done
etcdctl --endpoints="$ETCD_MON" put /vitastor/osd/stats/$OSD_NUM '{}'
echo Creating OSD $OSD_NUM on $DEV
OPT=`node $D/simple-offsets.js --device $DEV --format options | tr '\n' ' '`
META=`echo $OPT | grep -Po '(?<=data_offset )\d+'`
dd if=/dev/zero of=$DEV bs=1048576 count=$(((META+1048575)/1048576)) oflag=direct
cat >/etc/systemd/system/vitastor-osd$OSD_NUM.service <<EOF
[Unit]
Description=Vitastor object storage daemon osd.$OSD_NUM
After=network-online.target local-fs.target time-sync.target
Wants=network-online.target local-fs.target time-sync.target
PartOf=vitastor.target
[Service]
LimitNOFILE=1048576
LimitNPROC=1048576
LimitMEMLOCK=infinity
ExecStart=/usr/bin/vitastor-osd \\
--etcd_address $IP:2379/v3 \\
--bind_address $IP \\
--osd_num $OSD_NUM \\
--disable_data_fsync 1 \\
--immediate_commit all \\
--flusher_count 256 \\
--disk_alignment 4096 --journal_block_size 4096 --meta_block_size 4096 \\
--journal_no_same_sector_overwrites true \\
--journal_sector_buffer_count 1024 \\
$OPT
WorkingDirectory=/
ExecStartPre=+chown vitastor:vitastor $DEV
User=vitastor
PrivateTmp=false
TasksMax=infinity
Restart=always
StartLimitInterval=0
RestartSec=10
[Install]
WantedBy=vitastor.target
EOF
systemctl enable vitastor-osd$OSD_NUM
done

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@ -1,85 +0,0 @@
#!/bin/bash
# Very simple systemd unit generator for etcd & vitastor-mon services
# Not the final solution yet, mostly for tests
# Copyright (c) Vitaliy Filippov, 2019+
# License: MIT
# USAGE: ./make-units.sh
IP_SUBSTR="10.200.1."
ETCD_HOSTS="etcd0=http://10.200.1.10:2380,etcd1=http://10.200.1.11:2380,etcd2=http://10.200.1.12:2380"
# determine IP
IP=`ip -json a s | jq -r '.[].addr_info[] | select(.local | startswith("'$IP_SUBSTR'")) | .local'`
[ "$IP" != "" ] || exit 1
ETCD_NUM=${ETCD_HOSTS/$IP*/}
[ "$ETCD_NUM" != "$ETCD_HOSTS" ] || exit 1
ETCD_NUM=$(echo $ETCD_NUM | tr -d -c , | wc -c)
# etcd
useradd etcd
mkdir -p /var/lib/etcd$ETCD_NUM.etcd
cat >/etc/systemd/system/etcd.service <<EOF
[Unit]
Description=etcd for vitastor
After=network-online.target local-fs.target time-sync.target
Wants=network-online.target local-fs.target time-sync.target
[Service]
Restart=always
ExecStart=/usr/local/bin/etcd -name etcd$ETCD_NUM --data-dir /var/lib/etcd$ETCD_NUM.etcd \\
--advertise-client-urls http://$IP:2379 --listen-client-urls http://$IP:2379 \\
--initial-advertise-peer-urls http://$IP:2380 --listen-peer-urls http://$IP:2380 \\
--initial-cluster-token vitastor-etcd-1 --initial-cluster $ETCD_HOSTS \\
--initial-cluster-state new --max-txn-ops=100000 --auto-compaction-retention=10 --auto-compaction-mode=revision
WorkingDirectory=/var/lib/etcd$ETCD_NUM.etcd
ExecStartPre=+chown -R etcd /var/lib/etcd$ETCD_NUM.etcd
User=etcd
PrivateTmp=false
TasksMax=infinity
Restart=always
StartLimitInterval=0
RestartSec=10
[Install]
WantedBy=local.target
EOF
systemctl daemon-reload
systemctl enable etcd
systemctl start etcd
useradd vitastor
chmod 755 /root
# Vitastor target
cat >/etc/systemd/system/vitastor.target <<EOF
[Unit]
Description=vitastor target
[Install]
WantedBy=multi-user.target
EOF
# Monitor unit
ETCD_MON=$(echo $ETCD_HOSTS | perl -pe 's/:2380/:2379/g; s/etcd\d*=//g;')
cat >/etc/systemd/system/vitastor-mon.service <<EOF
[Unit]
Description=Vitastor monitor
After=network-online.target local-fs.target time-sync.target
Wants=network-online.target local-fs.target time-sync.target
[Service]
Restart=always
ExecStart=node /usr/lib/vitastor/mon/mon-main.js --etcd_url '$ETCD_MON' --etcd_prefix '/vitastor' --etcd_start_timeout 5
WorkingDirectory=/
User=vitastor
PrivateTmp=false
TasksMax=infinity
Restart=always
StartLimitInterval=0
RestartSec=10
[Install]
WantedBy=vitastor.target
EOF

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@ -1,23 +0,0 @@
const fsp = require('fs').promises;
async function merge(file1, file2, out)
{
if (!out)
{
console.error('USAGE: nodejs merge.js layer1 layer2 output');
process.exit();
}
const layer1 = await fsp.readFile(file1);
const layer2 = await fsp.readFile(file2);
const zero = Buffer.alloc(4096);
for (let i = 0; i < layer2.length; i += 4096)
{
if (zero.compare(layer2, i, i+4096) != 0)
{
layer2.copy(layer1, i, i, i+4096);
}
}
await fsp.writeFile(out, layer1);
}
merge(process.argv[2], process.argv[3], process.argv[4]);

1471
mon/mon.js

File diff suppressed because it is too large Load Diff

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@ -1,93 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: MIT
// Simple tool to calculate journal and metadata offsets for a single device
// Will be replaced by smarter tools in the future
const fs = require('fs').promises;
const child_process = require('child_process');
async function run()
{
const options = {
object_size: 128*1024,
bitmap_granularity: 4096,
journal_size: 16*1024*1024,
device_block_size: 4096,
journal_offset: 0,
device_size: 0,
format: 'text',
};
for (let i = 2; i < process.argv.length; i++)
{
if (process.argv[i].substr(0, 2) == '--')
{
options[process.argv[i].substr(2)] = process.argv[i+1];
i++;
}
}
if (!options.device)
{
process.stderr.write('USAGE: nodejs '+process.argv[1]+' --device /dev/sdXXX\n');
process.exit(1);
}
options.device_size = Number(options.device_size);
let device_size = options.device_size;
if (!device_size)
{
const st = await fs.stat(options.device);
options.device_block_size = st.blksize;
if (st.isBlockDevice())
device_size = Number(await system("/sbin/blockdev --getsize64 "+options.device))
else
device_size = st.size;
}
if (!device_size)
{
process.stderr.write('Failed to get device size\n');
process.exit(1);
}
options.journal_offset = Math.ceil(options.journal_offset/options.device_block_size)*options.device_block_size;
const meta_offset = options.journal_offset + Math.ceil(options.journal_size/options.device_block_size)*options.device_block_size;
const entries_per_block = Math.floor(options.device_block_size / (24 + 2*options.object_size/options.bitmap_granularity/8));
const object_count = Math.floor((device_size-meta_offset)/options.object_size);
const meta_size = Math.ceil(object_count / entries_per_block) * options.device_block_size;
const data_offset = meta_offset + meta_size;
const meta_size_fmt = (meta_size > 1024*1024*1024 ? Math.round(meta_size/1024/1024/1024*100)/100+" GB"
: Math.round(meta_size/1024/1024*100)/100+" MB");
if (options.format == 'text' || options.format == 'options')
{
if (options.format == 'text')
{
process.stderr.write(
`Metadata size: ${meta_size_fmt}\n`+
`Options for the OSD:\n`
);
}
process.stdout.write(
` --data_device ${options.device}\n`+
` --journal_offset ${options.journal_offset}\n`+
` --meta_offset ${meta_offset}\n`+
` --data_offset ${data_offset}\n`+
(options.device_size ? ` --data_size ${device_size-data_offset}\n` : '')
);
}
else if (options.format == 'env')
{
process.stdout.write(
`journal_offset=${options.journal_offset}\n`+
`meta_offset=${meta_offset}\n`+
`data_offset=${data_offset}\n`+
`data_size=${device_size-data_offset}\n`
);
}
else
process.stdout.write('Unknown format: '+options.format);
}
function system(cmd)
{
return new Promise((ok, no) => child_process.exec(cmd, { maxBuffer: 64*1024*1024 }, (err, stdout, stderr) => (err ? no(err.message) : ok(stdout))));
}
run().catch(err => { console.error(err); process.exit(1); });

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@ -1,78 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: MIT
function stableStringify(obj, opts)
{
if (!opts)
opts = {};
if (typeof opts === 'function')
opts = { cmp: opts };
let space = opts.space || '';
if (typeof space === 'number')
space = Array(space+1).join(' ');
const cycles = (typeof opts.cycles === 'boolean') ? opts.cycles : false;
const cmp = opts.cmp && (function (f)
{
return function (node)
{
return function (a, b)
{
let aobj = { key: a, value: node[a] };
let bobj = { key: b, value: node[b] };
return f(aobj, bobj);
};
};
})(opts.cmp);
const seen = new Map();
return (function stringify (parent, key, node, level)
{
const indent = space ? ('\n' + new Array(level + 1).join(space)) : '';
const colonSeparator = space ? ': ' : ':';
if (node === undefined)
{
return;
}
if (typeof node !== 'object' || node === null)
{
return JSON.stringify(node);
}
if (node instanceof Array)
{
const out = [];
for (let i = 0; i < node.length; i++)
{
const item = stringify(node, i, node[i], level+1) || JSON.stringify(null);
out.push(indent + space + item);
}
return '[' + out.join(',') + indent + ']';
}
else
{
if (seen.has(node))
{
if (cycles)
return JSON.stringify('__cycle__');
throw new TypeError('Converting circular structure to JSON');
}
else
seen.set(node, true);
const keys = Object.keys(node).sort(cmp && cmp(node));
const out = [];
for (let i = 0; i < keys.length; i++)
{
const key = keys[i];
const value = stringify(node, key, node[key], level+1);
if (!value)
continue;
const keyValue = JSON.stringify(key)
+ colonSeparator
+ value;
out.push(indent + space + keyValue);
}
seen.delete(node);
return '{' + out.join(',') + indent + '}';
}
})({ '': obj }, '', obj, 0);
}
module.exports = stableStringify;

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@ -1,130 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
// Interesting real-world example coming from Ceph with EC and compression enabled.
// EC parity chunks can't be compressed as efficiently as data chunks,
// thus they occupy more space (2.26x more space) in OSD object stores.
// This leads to really uneven OSD fill ratio in Ceph even when PGs are perfectly balanced.
// But we support this case with the "parity_space" parameter in optimize_initial()/optimize_change().
const LPOptimizer = require('./lp-optimizer.js');
const osd_tree = {
ripper5: {
osd0: 3.493144989013672,
osd1: 3.493144989013672,
osd2: 3.454082489013672,
osd12: 3.461894989013672,
},
ripper7: {
osd4: 3.638690948486328,
osd5: 3.638690948486328,
osd6: 3.638690948486328,
},
ripper4: {
osd9: 3.4609375,
osd10: 3.4609375,
osd11: 3.4609375,
},
ripper6: {
osd3: 3.5849609375,
osd7: 3.5859336853027344,
osd8: 3.638690948486328,
osd13: 3.461894989013672
},
};
const prev_pgs = [[12,7,5],[6,11,12],[3,6,9],[10,0,5],[2,5,13],[9,8,6],[3,4,12],[7,4,12],[12,11,13],[13,6,0],[4,13,10],[9,7,6],[7,10,0],[10,8,0],[3,10,2],[3,0,4],[6,13,0],[13,10,0],[13,10,5],[8,11,6],[3,9,2],[2,8,5],[8,9,5],[3,12,11],[0,7,4],[13,11,1],[11,3,12],[12,8,10],[7,5,12],[2,13,5],[7,11,0],[13,2,6],[0,6,8],[13,1,6],[0,13,4],[0,8,10],[4,10,0],[8,12,4],[8,12,9],[12,7,4],[13,9,5],[3,2,11],[1,9,7],[1,8,5],[5,12,9],[3,5,12],[2,8,10],[0,8,4],[1,4,11],[7,10,2],[12,13,5],[3,1,11],[7,1,4],[4,12,8],[7,0,9],[11,1,8],[3,0,5],[11,13,0],[1,13,5],[12,7,10],[12,8,4],[11,13,5],[0,11,6],[2,11,3],[13,1,11],[2,7,10],[7,10,12],[7,12,10],[12,11,5],[13,12,10],[2,3,9],[4,3,9],[13,2,5],[7,12,6],[12,10,13],[9,8,1],[13,1,5],[9,5,12],[5,11,7],[6,2,9],[8,11,6],[12,5,8],[6,13,1],[7,6,11],[2,3,6],[8,5,9],[1,13,6],[9,3,2],[7,11,1],[3,10,1],[0,11,7],[3,0,5],[1,3,6],[6,0,9],[3,11,4],[8,10,2],[13,1,9],[12,6,9],[3,12,9],[12,8,9],[7,5,0],[8,12,5],[0,11,3],[12,11,13],[0,7,11],[0,3,10],[1,3,11],[2,7,11],[13,2,6],[9,12,13],[8,2,4],[0,7,4],[5,13,0],[13,12,9],[1,9,8],[0,10,3],[3,5,10],[7,12,9],[2,13,4],[12,7,5],[9,2,7],[3,2,9],[6,2,7],[3,1,9],[4,3,2],[5,3,11],[0,7,6],[1,6,13],[7,10,2],[12,4,8],[13,12,6],[7,5,11],[6,2,3],[2,7,6],[2,3,10],[2,7,10],[11,12,6],[0,13,5],[10,2,4],[13,0,11],[7,0,6],[8,9,4],[8,4,11],[7,11,2],[3,4,2],[6,1,3],[7,2,11],[8,9,4],[11,4,8],[10,3,1],[2,10,13],[1,7,11],[13,11,12],[2,6,9],[10,0,13],[7,10,4],[0,11,13],[13,10,1],[7,5,0],[7,12,10],[3,1,4],[7,1,5],[3,11,5],[7,5,0],[1,3,5],[10,5,12],[0,3,9],[7,1,11],[11,8,12],[3,6,2],[7,12,9],[7,11,12],[4,11,3],[0,11,13],[13,2,5],[1,5,8],[0,11,8],[3,5,1],[11,0,6],[3,11,2],[11,8,12],[4,1,3],[10,13,4],[13,9,6],[2,3,10],[12,7,9],[10,0,4],[10,13,2],[3,11,1],[7,2,9],[1,7,4],[13,1,4],[7,0,6],[5,3,9],[10,0,7],[0,7,10],[3,6,10],[13,0,5],[8,4,1],[3,1,10],[2,10,13],[13,0,5],[13,10,2],[12,7,9],[6,8,10],[6,1,8],[10,8,1],[13,5,0],[5,11,3],[7,6,1],[8,5,9],[2,13,11],[10,12,4],[13,4,1],[2,13,4],[11,7,0],[2,9,7],[1,7,6],[8,0,4],[8,1,9],[7,10,12],[13,9,6],[7,6,11],[13,0,4],[1,8,4],[3,12,5],[10,3,1],[10,2,13],[2,4,8],[6,2,3],[3,0,10],[6,7,12],[8,12,5],[3,0,6],[13,12,10],[11,3,6],[9,0,13],[10,0,6],[7,5,2],[1,3,11],[7,10,2],[2,9,8],[11,13,12],[0,8,4],[8,12,11],[6,0,3],[1,13,4],[11,8,2],[12,3,6],[4,7,1],[7,6,12],[3,10,6],[0,10,7],[8,9,1],[0,10,6],[8,10,1]]
.map(pg => pg.map(n => 'osd'+n));
const by_osd = {};
for (let i = 0; i < prev_pgs.length; i++)
{
for (let j = 0; j < prev_pgs[i].length; j++)
{
by_osd[prev_pgs[i][j]] = by_osd[prev_pgs[i][j]] || [];
by_osd[prev_pgs[i][j]][j] = (by_osd[prev_pgs[i][j]][j] || 0) + 1;
}
}
/*
This set of PGs was balanced by hand, by heavily tuning OSD weights in Ceph:
{
osd0: 4.2,
osd1: 3.5,
osd2: 3.45409,
osd3: 4.5,
osd4: 1.4,
osd5: 1.4,
osd6: 1.75,
osd7: 4.5,
osd8: 4.4,
osd9: 2.2,
osd10: 2.7,
osd11: 2,
osd12: 3.4,
osd13: 3.4,
}
EC+compression is a nightmare in Ceph, yeah :))
To calculate the average ratio between data chunks and parity chunks we
calculate the number of PG chunks for each chunk role for each OSD:
{
osd12: [ 18, 22, 17 ],
osd7: [ 35, 22, 8 ],
osd5: [ 6, 17, 27 ],
osd6: [ 13, 12, 28 ],
osd11: [ 13, 26, 20 ],
osd3: [ 30, 20, 10 ],
osd9: [ 8, 12, 26 ],
osd10: [ 15, 23, 20 ],
osd0: [ 22, 22, 14 ],
osd2: [ 22, 16, 16 ],
osd13: [ 29, 19, 13 ],
osd8: [ 20, 18, 12 ],
osd4: [ 8, 10, 28 ],
osd1: [ 17, 17, 17 ]
}
And now we can pick a pair of OSDs and determine the ratio by solving the following:
osd5 = 23*X + 27*Y = 3249728140
osd13 = 48*X + 13*Y = 2991675992
=>
osd5 - 27/13*osd13 = 23*X - 27/13*48*X = -76.6923076923077*X = -2963752766.46154
=>
X = 38644720.1243731
Y = (osd5-23*X)/27 = 87440725.0792377
Y/X = 2.26268232239284 ~= 2.26
Which means that parity chunks are compressed ~2.26 times worse than data chunks.
Fine, let's try to optimize for it.
*/
async function run()
{
const all_weights = Object.assign({}, ...Object.values(osd_tree));
const total_weight = Object.values(all_weights).reduce((a, c) => Number(a) + Number(c), 0);
const eff = LPOptimizer.pg_list_space_efficiency(prev_pgs, all_weights, 2, 2.26);
const orig = eff*4.26 / total_weight;
console.log('Original efficiency was: '+Math.round(orig*10000)/100+' %');
let prev = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 3, pg_count: 256, parity_space: 2.26 });
LPOptimizer.print_change_stats(prev);
let next = await LPOptimizer.optimize_change({ prev_pgs, osd_tree, pg_size: 3, max_combinations: 10000, parity_space: 2.26 });
LPOptimizer.print_change_stats(next);
}
run().catch(console.error);

View File

@ -1,25 +0,0 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
const LPOptimizer = require('./lp-optimizer.js');
async function run()
{
const osd_tree = { a: { 1: 1 }, b: { 2: 1 }, c: { 3: 1 } };
let res;
console.log('16 PGs, size=3');
res = await LPOptimizer.optimize_initial({ osd_tree, pg_size: 3, pg_count: 16 });
LPOptimizer.print_change_stats(res, false);
console.log('\nReduce PG size to 2');
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs.map(pg => pg.slice(0, 2)), osd_tree, pg_size: 2 });
LPOptimizer.print_change_stats(res, false);
console.log('\nRemove OSD 3');
delete osd_tree['c'];
res = await LPOptimizer.optimize_change({ prev_pgs: res.int_pgs, osd_tree, pg_size: 2 });
LPOptimizer.print_change_stats(res, false);
}
run().catch(console.error);

View File

@ -1,19 +1,14 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
#pragma once
#include <stdint.h>
#include <functional>
typedef uint64_t inode_t;
// 16 bytes per object/stripe id
// stripe = (start of the parity stripe + peer role)
// i.e. for example (256KB + one of 0,1,2)
struct __attribute__((__packed__)) object_id
{
inode_t inode;
uint64_t inode;
uint64_t stripe;
};

View File

@ -1,7 +1,5 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include <sys/socket.h>
#include <sys/epoll.h>
#include <sys/poll.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
@ -9,41 +7,51 @@
#include "osd.h"
osd_t::osd_t(blockstore_config_t & config, ring_loop_t *ringloop)
{
bs_block_size = strtoull(config["block_size"].c_str(), NULL, 10);
bs_bitmap_granularity = strtoull(config["bitmap_granularity"].c_str(), NULL, 10);
if (!bs_block_size)
bs_block_size = DEFAULT_BLOCK_SIZE;
if (!bs_bitmap_granularity)
bs_bitmap_granularity = DEFAULT_BITMAP_GRANULARITY;
clean_entry_bitmap_size = bs_block_size / bs_bitmap_granularity / 8;
const char* osd_op_names[] = {
"",
"read",
"write",
"sync",
"stabilize",
"rollback",
"delete",
"sync_stab_all",
"list",
"show_config",
"primary_read",
"primary_write",
"primary_sync",
"primary_delete",
};
osd_t::osd_t(blockstore_config_t & config, blockstore_t *bs, ring_loop_t *ringloop)
{
this->config = config;
this->bs = bs;
this->ringloop = ringloop;
// FIXME: Create Blockstore from on-disk superblock config and check it against the OSD cluster config
this->bs = new blockstore_t(config, ringloop);
this->bs_block_size = bs->get_block_size();
// FIXME: use bitmap granularity instead
this->bs_disk_alignment = bs->get_disk_alignment();
parse_config(config);
epmgr = new epoll_manager_t(ringloop);
this->tfd = epmgr->tfd;
epoll_fd = epoll_create(1);
if (epoll_fd < 0)
{
throw std::runtime_error(std::string("epoll_create: ") + strerror(errno));
}
this->tfd = new timerfd_manager_t([this](int fd, bool out, std::function<void(int, int)> handler) { set_fd_handler(fd, out, handler); });
this->tfd->set_timer(print_stats_interval*1000, true, [this](int timer_id)
{
print_stats();
});
this->tfd->set_timer(slow_log_interval*1000, true, [this](int timer_id)
{
print_slow();
});
c_cli.tfd = this->tfd;
c_cli.ringloop = this->ringloop;
c_cli.exec_op = [this](osd_op_t *op) { exec_op(op); };
c_cli.repeer_pgs = [this](osd_num_t peer_osd) { repeer_pgs(peer_osd); };
c_cli.init();
init_cluster();
@ -53,20 +61,41 @@ osd_t::osd_t(blockstore_config_t & config, ring_loop_t *ringloop)
osd_t::~osd_t()
{
if (tfd)
{
delete tfd;
tfd = NULL;
}
ringloop->unregister_consumer(&consumer);
delete epmgr;
delete bs;
close(epoll_fd);
close(listen_fd);
}
void osd_t::parse_config(blockstore_config_t & config)
{
if (config.find("log_level") == config.end())
config["log_level"] = "1";
log_level = strtoull(config["log_level"].c_str(), NULL, 10);
int pos;
// Initial startup configuration
json11::Json json_config = json11::Json(config);
st_cli.parse_config(json_config);
{
std::string ea = config["etcd_address"];
while (1)
{
pos = ea.find(',');
std::string addr = pos >= 0 ? ea.substr(0, pos) : ea;
if (addr.length() > 0)
{
if (addr.find('/') < 0)
addr += "/v3";
st_cli.etcd_addresses.push_back(addr);
}
if (pos >= 0)
ea = ea.substr(pos+1);
else
break;
}
}
st_cli.etcd_prefix = config["etcd_prefix"];
if (st_cli.etcd_prefix == "")
st_cli.etcd_prefix = "/microceph";
etcd_report_interval = strtoull(config["etcd_report_interval"].c_str(), NULL, 10);
if (etcd_report_interval <= 0)
etcd_report_interval = 30;
@ -75,8 +104,6 @@ void osd_t::parse_config(blockstore_config_t & config)
throw std::runtime_error("osd_num is required in the configuration");
c_cli.osd_num = osd_num;
run_primary = config["run_primary"] != "false" && config["run_primary"] != "0" && config["run_primary"] != "no";
no_rebalance = config["no_rebalance"] == "true" || config["no_rebalance"] == "1" || config["no_rebalance"] == "yes";
no_recovery = config["no_recovery"] == "true" || config["no_recovery"] == "1" || config["no_recovery"] == "yes";
// Cluster configuration
bind_address = config["bind_address"];
if (bind_address == "")
@ -100,21 +127,29 @@ void osd_t::parse_config(blockstore_config_t & config)
if (client_queue_depth < 128)
client_queue_depth = 128;
}
if (config.find("pg_stripe_size") != config.end())
{
pg_stripe_size = strtoull(config["pg_stripe_size"].c_str(), NULL, 10);
if (!pg_stripe_size || !bs_block_size || pg_stripe_size < bs_block_size || (pg_stripe_size % bs_block_size) != 0)
pg_stripe_size = DEFAULT_PG_STRIPE_SIZE;
}
recovery_queue_depth = strtoull(config["recovery_queue_depth"].c_str(), NULL, 10);
if (recovery_queue_depth < 1 || recovery_queue_depth > MAX_RECOVERY_QUEUE)
recovery_queue_depth = DEFAULT_RECOVERY_QUEUE;
recovery_sync_batch = strtoull(config["recovery_sync_batch"].c_str(), NULL, 10);
if (recovery_sync_batch < 1 || recovery_sync_batch > MAX_RECOVERY_QUEUE)
recovery_sync_batch = DEFAULT_RECOVERY_BATCH;
if (config["readonly"] == "true" || config["readonly"] == "1" || config["readonly"] == "yes")
readonly = true;
print_stats_interval = strtoull(config["print_stats_interval"].c_str(), NULL, 10);
if (!print_stats_interval)
print_stats_interval = 3;
slow_log_interval = strtoull(config["slow_log_interval"].c_str(), NULL, 10);
if (!slow_log_interval)
slow_log_interval = 10;
c_cli.parse_config(json_config);
c_cli.peer_connect_interval = strtoull(config["peer_connect_interval"].c_str(), NULL, 10);
if (!c_cli.peer_connect_interval)
c_cli.peer_connect_interval = 5;
c_cli.peer_connect_timeout = strtoull(config["peer_connect_timeout"].c_str(), NULL, 10);
if (!c_cli.peer_connect_timeout)
c_cli.peer_connect_timeout = 5;
log_level = strtoull(config["log_level"].c_str(), NULL, 10);
st_cli.log_level = log_level;
c_cli.log_level = log_level;
}
void osd_t::bind_socket()
@ -165,10 +200,15 @@ void osd_t::bind_socket()
fcntl(listen_fd, F_SETFL, fcntl(listen_fd, F_GETFL, 0) | O_NONBLOCK);
epmgr->set_fd_handler(listen_fd, false, [this](int fd, int events)
epoll_event ev;
ev.data.fd = listen_fd;
ev.events = EPOLLIN;
if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, listen_fd, &ev) < 0)
{
c_cli.accept_connections(listen_fd);
});
close(listen_fd);
close(epoll_fd);
throw std::runtime_error(std::string("epoll_ctl: ") + strerror(errno));
}
}
bool osd_t::shutdown()
@ -178,17 +218,124 @@ bool osd_t::shutdown()
{
return false;
}
return !bs || bs->is_safe_to_stop();
return bs->is_safe_to_stop();
}
void osd_t::loop()
{
if (!wait_state)
{
handle_epoll_events();
wait_state = 1;
}
handle_peers();
c_cli.read_requests();
c_cli.send_replies();
ringloop->submit();
}
void osd_t::set_fd_handler(int fd, bool out, std::function<void(int, int)> handler)
{
if (handler != NULL)
{
bool exists = epoll_handlers.find(fd) != epoll_handlers.end();
epoll_event ev;
ev.data.fd = fd;
ev.events = EPOLLIN | (out ? EPOLLOUT : 0) | EPOLLRDHUP;
if (epoll_ctl(epoll_fd, exists ? EPOLL_CTL_MOD : EPOLL_CTL_ADD, fd, &ev) < 0)
{
throw std::runtime_error(std::string("epoll_ctl: ") + strerror(errno));
}
epoll_handlers[fd] = handler;
}
else
{
if (epoll_ctl(epoll_fd, EPOLL_CTL_DEL, fd, NULL) < 0 && errno != ENOENT)
{
throw std::runtime_error(std::string("epoll_ctl: ") + strerror(errno));
}
epoll_handlers.erase(fd);
}
}
void osd_t::handle_epoll_events()
{
wait_state = 0;
{
timespec now;
clock_gettime(CLOCK_REALTIME, &now);
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
}
io_uring_sqe *sqe = ringloop->get_sqe();
if (!sqe)
{
return;
}
wait_state = 1;
ring_data_t *data = ((ring_data_t*)sqe->user_data);
my_uring_prep_poll_add(sqe, epoll_fd, POLLIN);
data->callback = [this](ring_data_t *data)
{
if (data->res < 0)
{
throw std::runtime_error(std::string("epoll failed: ") + strerror(-data->res));
}
handle_epoll_events();
};
int nfds;
epoll_event events[MAX_EPOLL_EVENTS];
restart:
nfds = epoll_wait(epoll_fd, events, MAX_EPOLL_EVENTS, 0);
for (int i = 0; i < nfds; i++)
{
if (events[i].data.fd == listen_fd)
{
// Accept new connections
sockaddr_in addr;
socklen_t peer_addr_size = sizeof(addr);
int peer_fd;
while ((peer_fd = accept(listen_fd, (sockaddr*)&addr, &peer_addr_size)) >= 0)
{
assert(peer_fd != 0);
char peer_str[256];
printf("[OSD %lu] new client %d: connection from %s port %d\n", this->osd_num, peer_fd,
inet_ntop(AF_INET, &addr.sin_addr, peer_str, 256), ntohs(addr.sin_port));
fcntl(peer_fd, F_SETFL, fcntl(listen_fd, F_GETFL, 0) | O_NONBLOCK);
int one = 1;
setsockopt(peer_fd, SOL_TCP, TCP_NODELAY, &one, sizeof(one));
c_cli.clients[peer_fd] = {
.peer_addr = addr,
.peer_port = ntohs(addr.sin_port),
.peer_fd = peer_fd,
.peer_state = PEER_CONNECTED,
.in_buf = malloc(c_cli.receive_buffer_size),
};
// Add FD to epoll
set_fd_handler(peer_fd, false, [this](int peer_fd, int epoll_events)
{
c_cli.handle_peer_epoll(peer_fd, epoll_events);
});
// Try to accept next connection
peer_addr_size = sizeof(addr);
}
if (peer_fd == -1 && errno != EAGAIN)
{
throw std::runtime_error(std::string("accept: ") + strerror(errno));
}
}
else
{
auto & cb = epoll_handlers[events[i].data.fd];
cb(events[i].data.fd, events[i].events);
}
}
printf("%d events\n", nfds);
if (nfds == MAX_EPOLL_EVENTS)
{
goto restart;
}
}
void osd_t::exec_op(osd_op_t *cur_op)
{
clock_gettime(CLOCK_REALTIME, &cur_op->tv_begin);
@ -199,34 +346,21 @@ void osd_t::exec_op(osd_op_t *cur_op)
return;
}
inflight_ops++;
cur_op->send_list.push_back(cur_op->reply.buf, OSD_PACKET_SIZE);
if (cur_op->req.hdr.magic != SECONDARY_OSD_OP_MAGIC ||
cur_op->req.hdr.opcode < OSD_OP_MIN || cur_op->req.hdr.opcode > OSD_OP_MAX ||
((cur_op->req.hdr.opcode == OSD_OP_SEC_READ ||
cur_op->req.hdr.opcode == OSD_OP_SEC_WRITE ||
cur_op->req.hdr.opcode == OSD_OP_SEC_WRITE_STABLE) &&
(cur_op->req.sec_rw.len > OSD_RW_MAX ||
cur_op->req.sec_rw.len % bs_bitmap_granularity ||
cur_op->req.sec_rw.offset % bs_bitmap_granularity)) ||
((cur_op->req.hdr.opcode == OSD_OP_READ ||
cur_op->req.hdr.opcode == OSD_OP_WRITE ||
cur_op->req.hdr.opcode == OSD_OP_DELETE) &&
(cur_op->req.rw.len > OSD_RW_MAX ||
cur_op->req.rw.len % bs_bitmap_granularity ||
cur_op->req.rw.offset % bs_bitmap_granularity)))
(cur_op->req.hdr.opcode == OSD_OP_SECONDARY_READ || cur_op->req.hdr.opcode == OSD_OP_SECONDARY_WRITE) &&
(cur_op->req.sec_rw.len > OSD_RW_MAX || cur_op->req.sec_rw.len % bs_disk_alignment || cur_op->req.sec_rw.offset % bs_disk_alignment) ||
(cur_op->req.hdr.opcode == OSD_OP_READ || cur_op->req.hdr.opcode == OSD_OP_WRITE || cur_op->req.hdr.opcode == OSD_OP_DELETE) &&
(cur_op->req.rw.len > OSD_RW_MAX || cur_op->req.rw.len % bs_disk_alignment || cur_op->req.rw.offset % bs_disk_alignment))
{
// Bad command
finish_op(cur_op, -EINVAL);
return;
}
if (cur_op->req.hdr.opcode == OSD_OP_PING)
{
// Pong
finish_op(cur_op, 0);
return;
}
if (readonly &&
cur_op->req.hdr.opcode != OSD_OP_SEC_READ &&
cur_op->req.hdr.opcode != OSD_OP_SEC_LIST &&
cur_op->req.hdr.opcode != OSD_OP_SECONDARY_READ &&
cur_op->req.hdr.opcode != OSD_OP_SECONDARY_LIST &&
cur_op->req.hdr.opcode != OSD_OP_READ &&
cur_op->req.hdr.opcode != OSD_OP_SHOW_CONFIG)
{
@ -274,9 +408,9 @@ void osd_t::reset_stats()
void osd_t::print_stats()
{
for (int i = OSD_OP_MIN; i <= OSD_OP_MAX; i++)
for (int i = 0; i <= OSD_OP_MAX; i++)
{
if (c_cli.stats.op_stat_count[i] != prev_stats.op_stat_count[i] && i != OSD_OP_PING)
if (c_cli.stats.op_stat_count[i] != prev_stats.op_stat_count[i])
{
uint64_t avg = (c_cli.stats.op_stat_sum[i] - prev_stats.op_stat_sum[i])/(c_cli.stats.op_stat_count[i] - prev_stats.op_stat_count[i]);
uint64_t bw = (c_cli.stats.op_stat_bytes[i] - prev_stats.op_stat_bytes[i]) / print_stats_interval;
@ -297,7 +431,7 @@ void osd_t::print_stats()
prev_stats.op_stat_bytes[i] = c_cli.stats.op_stat_bytes[i];
}
}
for (int i = OSD_OP_MIN; i <= OSD_OP_MAX; i++)
for (int i = 0; i <= OSD_OP_MAX; i++)
{
if (c_cli.stats.subop_stat_count[i] != prev_stats.subop_stat_count[i])
{
@ -335,73 +469,3 @@ void osd_t::print_stats()
printf("[OSD %lu] %lu object(s) misplaced\n", osd_num, misplaced_objects);
}
}
void osd_t::print_slow()
{
char alloc[1024];
timespec now;
clock_gettime(CLOCK_REALTIME, &now);
for (auto & kv: c_cli.clients)
{
for (auto op: kv.second->received_ops)
{
if ((now.tv_sec - op->tv_begin.tv_sec) >= slow_log_interval)
{
int l = sizeof(alloc), n;
char *buf = alloc;
#define bufprintf(s, ...) { n = snprintf(buf, l, s, __VA_ARGS__); n = n < 0 ? 0 : n; buf += n; l -= n; }
bufprintf("[OSD %lu] Slow op", osd_num);
if (kv.second->osd_num)
{
bufprintf(" from peer OSD %lu (client %d)", kv.second->osd_num, kv.second->peer_fd);
}
else
{
bufprintf(" from client %d", kv.second->peer_fd);
}
bufprintf(": %s id=%lu", osd_op_names[op->req.hdr.opcode], op->req.hdr.id);
if (op->req.hdr.opcode == OSD_OP_SEC_READ || op->req.hdr.opcode == OSD_OP_SEC_WRITE ||
op->req.hdr.opcode == OSD_OP_SEC_WRITE_STABLE || op->req.hdr.opcode == OSD_OP_SEC_DELETE)
{
bufprintf(" %lx:%lx v", op->req.sec_rw.oid.inode, op->req.sec_rw.oid.stripe);
if (op->req.sec_rw.version == UINT64_MAX)
{
bufprintf("%s", "max");
}
else
{
bufprintf("%lu", op->req.sec_rw.version);
}
if (op->req.hdr.opcode != OSD_OP_SEC_DELETE)
{
bufprintf(" offset=%x len=%x", op->req.sec_rw.offset, op->req.sec_rw.len);
}
}
else if (op->req.hdr.opcode == OSD_OP_SEC_STABILIZE || op->req.hdr.opcode == OSD_OP_SEC_ROLLBACK)
{
for (uint64_t i = 0; i < op->req.sec_stab.len; i += sizeof(obj_ver_id))
{
obj_ver_id *ov = (obj_ver_id*)(op->buf + i);
bufprintf(i == 0 ? " %lx:%lx v%lu" : ", %lx:%lx v%lu", ov->oid.inode, ov->oid.stripe, ov->version);
}
}
else if (op->req.hdr.opcode == OSD_OP_SEC_LIST)
{
bufprintf(
" inode=%lx-%lx pg=%u/%u, stripe=%lu",
op->req.sec_list.min_inode, op->req.sec_list.max_inode,
op->req.sec_list.list_pg, op->req.sec_list.pg_count,
op->req.sec_list.pg_stripe_size
);
}
else if (op->req.hdr.opcode == OSD_OP_READ || op->req.hdr.opcode == OSD_OP_WRITE ||
op->req.hdr.opcode == OSD_OP_DELETE)
{
bufprintf(" inode=%lx offset=%lx len=%x", op->req.rw.inode, op->req.rw.offset, op->req.rw.len);
}
#undef bufprintf
printf("%s\n", alloc);
}
}
}
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#include <sys/types.h>
@ -19,9 +16,8 @@
#include "blockstore.h"
#include "ringloop.h"
#include "timerfd_manager.h"
#include "epoll_manager.h"
#include "osd_peering_pg.h"
#include "messenger.h"
#include "cluster_client.h"
#include "etcd_state_client.h"
#define OSD_LOADING_PGS 0x01
@ -37,10 +33,12 @@
#define DEFAULT_AUTOSYNC_INTERVAL 5
#define MAX_RECOVERY_QUEUE 2048
#define DEFAULT_RECOVERY_QUEUE 4
#define DEFAULT_RECOVERY_BATCH 16
#define DEFAULT_PG_STRIPE_SIZE 4*1024*1024 // 4 MB by default
//#define OSD_STUB
extern const char* osd_op_names[];
struct osd_object_id_t
{
osd_num_t osd_num;
@ -51,21 +49,11 @@ struct osd_recovery_op_t
{
int st = 0;
bool degraded = false;
pg_num_t pg_num = 0;
object_id oid = { 0 };
osd_op_t *osd_op = NULL;
};
// Posted as /osd/inodestats/$osd, then accumulated by the monitor
#define INODE_STATS_READ 0
#define INODE_STATS_WRITE 1
#define INODE_STATS_DELETE 2
struct inode_stats_t
{
uint64_t op_sum[3] = { 0 };
uint64_t op_count[3] = { 0 };
uint64_t op_bytes[3] = { 0 };
};
class osd_t
{
// config
@ -76,45 +64,38 @@ class osd_t
bool readonly = false;
osd_num_t osd_num = 1; // OSD numbers start with 1
bool run_primary = false;
bool no_rebalance = false;
bool no_recovery = false;
std::string bind_address;
int bind_port, listen_backlog;
// FIXME: Implement client queue depth limit
int client_queue_depth = 128;
bool allow_test_ops = true;
int print_stats_interval = 3;
int slow_log_interval = 10;
int immediate_commit = IMMEDIATE_NONE;
int autosync_interval = DEFAULT_AUTOSYNC_INTERVAL; // sync every 5 seconds
int recovery_queue_depth = DEFAULT_RECOVERY_QUEUE;
int recovery_sync_batch = DEFAULT_RECOVERY_BATCH;
int log_level = 0;
// cluster state
etcd_state_client_t st_cli;
osd_messenger_t c_cli;
cluster_client_t c_cli;
int etcd_failed_attempts = 0;
std::string etcd_lease_id;
json11::Json self_state;
bool loading_peer_config = false;
std::set<pool_pg_num_t> pg_state_dirty;
std::set<pg_num_t> pg_state_dirty;
bool pg_config_applied = false;
bool etcd_reporting_pg_state = false;
bool etcd_reporting_stats = false;
// peers and PGs
std::map<pool_id_t, pg_num_t> pg_counts;
std::map<pool_pg_num_t, pg_t> pgs;
std::set<pool_pg_num_t> dirty_pgs;
std::set<osd_num_t> dirty_osds;
int copies_to_delete_after_sync_count = 0;
std::map<pg_num_t, pg_t> pgs;
std::set<pg_num_t> dirty_pgs;
uint64_t misplaced_objects = 0, degraded_objects = 0, incomplete_objects = 0;
int peering_state = 0;
unsigned pg_count = 0;
std::map<object_id, osd_recovery_op_t> recovery_ops;
int recovery_done = 0;
osd_op_t *autosync_op = NULL;
// Unstable writes
@ -126,18 +107,20 @@ class osd_t
bool stopping = false;
int inflight_ops = 0;
blockstore_t *bs;
uint32_t bs_block_size, bs_bitmap_granularity, clean_entry_bitmap_size;
uint32_t bs_block_size, bs_disk_alignment;
uint64_t pg_stripe_size = DEFAULT_PG_STRIPE_SIZE;
ring_loop_t *ringloop;
timerfd_manager_t *tfd = NULL;
epoll_manager_t *epmgr = NULL;
int wait_state = 0;
int epoll_fd = 0;
int listening_port = 0;
int listen_fd = 0;
ring_consumer_t consumer;
std::map<int, std::function<void(int, int)>> epoll_handlers;
// op statistics
osd_op_stats_t prev_stats;
std::map<uint64_t, inode_stats_t> inode_stats;
const char* recovery_stat_names[2] = { "degraded", "misplaced" };
uint64_t recovery_stat_count[2][2] = { 0 };
uint64_t recovery_stat_bytes[2][2] = { 0 };
@ -145,8 +128,7 @@ class osd_t
// cluster connection
void parse_config(blockstore_config_t & config);
void init_cluster();
void on_change_osd_state_hook(osd_num_t peer_osd);
void on_change_pg_history_hook(pool_id_t pool_id, pg_num_t pg_num);
void on_change_osd_state_hook(uint64_t osd_num);
void on_change_etcd_state_hook(json11::Json::object & changes);
void on_load_config_hook(json11::Json::object & changes);
json11::Json on_load_pgs_checks_hook();
@ -157,7 +139,6 @@ class osd_t
void create_osd_state();
void renew_lease();
void print_stats();
void print_slow();
void reset_stats();
json11::Json get_statistics();
void report_statistics();
@ -168,23 +149,24 @@ class osd_t
// event loop, socket read/write
void loop();
void set_fd_handler(int fd, bool out, std::function<void(int, int)> handler);
void handle_epoll_events();
// peer handling (primary OSD logic)
void parse_test_peer(std::string peer);
void handle_peers();
void repeer_pgs(osd_num_t osd_num);
void start_pg_peering(pg_t & pg);
void start_pg_peering(pg_num_t pg_num);
void submit_sync_and_list_subop(osd_num_t role_osd, pg_peering_state_t *ps);
void submit_list_subop(osd_num_t role_osd, pg_peering_state_t *ps);
void discard_list_subop(osd_op_t *list_op);
bool stop_pg(pg_t & pg);
void reset_pg(pg_t & pg);
bool stop_pg(pg_num_t pg_num);
void finish_stop_pg(pg_t & pg);
// flushing, recovery and backfill
void submit_pg_flush_ops(pg_t & pg);
void handle_flush_op(bool rollback, pool_id_t pool_id, pg_num_t pg_num, pg_flush_batch_t *fb, osd_num_t peer_osd, int retval);
void submit_flush_op(pool_id_t pool_id, pg_num_t pg_num, pg_flush_batch_t *fb, bool rollback, osd_num_t peer_osd, int count, obj_ver_id *data);
void submit_pg_flush_ops(pg_num_t pg_num);
void handle_flush_op(bool rollback, pg_num_t pg_num, pg_flush_batch_t *fb, osd_num_t peer_osd, int retval);
void submit_flush_op(pg_num_t pg_num, pg_flush_batch_t *fb, bool rollback, osd_num_t peer_osd, int count, obj_ver_id *data);
bool pick_next_recovery(osd_recovery_op_t &op);
void submit_recovery_op(osd_recovery_op_t *op);
bool continue_recovery();
@ -205,32 +187,27 @@ class osd_t
bool prepare_primary_rw(osd_op_t *cur_op);
void continue_primary_read(osd_op_t *cur_op);
void continue_primary_write(osd_op_t *cur_op);
void cancel_primary_write(osd_op_t *cur_op);
void continue_primary_sync(osd_op_t *cur_op);
void continue_primary_del(osd_op_t *cur_op);
bool check_write_queue(osd_op_t *cur_op, pg_t & pg);
void remove_object_from_state(object_id & oid, pg_osd_set_state_t *object_state, pg_t &pg);
bool remember_unstable_write(osd_op_t *cur_op, pg_t & pg, pg_osd_set_t & loc_set, int base_state);
void handle_primary_subop(osd_op_t *subop, osd_op_t *cur_op);
bool finalize_primary_write(osd_op_t *cur_op, pg_t & pg, pg_osd_set_t & loc_set, int base_state);
void handle_primary_subop(uint64_t opcode, osd_op_t *cur_op, int retval, int expected, uint64_t version);
void handle_primary_bs_subop(osd_op_t *subop);
void add_bs_subop_stats(osd_op_t *subop);
void pg_cancel_write_queue(pg_t & pg, osd_op_t *first_op, object_id oid, int retval);
void submit_primary_subops(int submit_type, uint64_t op_version, int pg_size, const uint64_t* osd_set, osd_op_t *cur_op);
void submit_primary_del_subops(osd_op_t *cur_op, uint64_t *cur_set, uint64_t set_size, pg_osd_set_t & loc_set);
void submit_primary_del_batch(osd_op_t *cur_op, obj_ver_osd_t *chunks_to_delete, int chunks_to_delete_count);
void pg_cancel_write_queue(pg_t & pg, object_id oid, int retval);
void submit_primary_subops(int submit_type, int read_pg_size, const uint64_t* osd_set, osd_op_t *cur_op);
void submit_primary_del_subops(osd_op_t *cur_op, uint64_t *cur_set, pg_osd_set_t & loc_set);
void submit_primary_sync_subops(osd_op_t *cur_op);
void submit_primary_stab_subops(osd_op_t *cur_op);
inline pg_num_t map_to_pg(object_id oid, uint64_t pg_stripe_size)
inline pg_num_t map_to_pg(object_id oid)
{
uint64_t pg_count = pg_counts[INODE_POOL(oid.inode)];
if (!pg_count)
pg_count = 1;
return (oid.inode + oid.stripe / pg_stripe_size) % pg_count + 1;
}
public:
osd_t(blockstore_config_t & config, ring_loop_t *ringloop);
osd_t(blockstore_config_t & config, blockstore_t *bs, ring_loop_t *ringloop);
~osd_t();
void force_stop(int exitcode);
bool shutdown();

40
osd_client.cpp Normal file
View File

@ -0,0 +1,40 @@
void slice()
{
// Slice the request into blockstore requests to individual objects
// Primary OSD still operates individual stripes, except they're twice the size of the blockstore's stripe.
std::vector read_parts;
int block = bs->get_block_size();
uint64_t stripe1 = cur_op->req.rw.offset / block / 2;
uint64_t stripe2 = (cur_op->req.rw.offset + cur_op->req.rw.len + block*2 - 1) / block / 2 - 1;
for (uint64_t s = stripe1; s <= stripe2; s++)
{
uint64_t start = s == stripe1 ? cur_op->req.rw.offset - stripe1*block*2 : 0;
uint64_t end = s == stripe2 ? cur_op->req.rw.offset + cur_op->req.rw.len - stripe2*block*2 : block*2;
if (start < block)
{
read_parts.push_back({
.role = 1,
.oid = {
.inode = cur_op->req.rw.inode,
.stripe = (s << STRIPE_ROLE_BITS) | 1,
},
.version = UINT64_MAX,
.offset = start,
.len = (block < end ? block : end) - start,
});
}
if (end > block)
{
read_parts.push_back({
.role = 2,
.oid = {
.inode = cur_op->req.rw.inode,
.stripe = (s << STRIPE_ROLE_BITS) | 2,
},
.version = UINT64_MAX,
.offset = (start > block ? start-block : 0),
.len = end - (start > block ? start-block : 0),
});
}
}
}

View File

@ -1,10 +1,6 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "osd.h"
#include "base64.h"
#include "etcd_state_client.h"
#include "osd_rmw.h"
// Startup sequence:
// Start etcd watcher -> Load global OSD configuration -> Bind socket -> Acquire lease -> Report&lock OSD state
@ -18,7 +14,7 @@ void osd_t::init_cluster()
{
if (run_primary)
{
// Test version of clustering code with 1 pool, 1 PG and 2 peers
// Test version of clustering code with 1 PG and 2 peers
// Example: peers = 2:127.0.0.1:11204,3:127.0.0.1:11205
std::string peerstr = config["peers"];
while (peerstr.size())
@ -31,30 +27,15 @@ void osd_t::init_cluster()
{
throw std::runtime_error("run_primary requires at least 2 peers");
}
pgs[{ 1, 1 }] = (pg_t){
pgs[1] = (pg_t){
.state = PG_PEERING,
.scheme = POOL_SCHEME_XOR,
.pg_cursize = 0,
.pg_size = 3,
.pg_minsize = 2,
.pg_data_size = 2,
.pool_id = 1,
.pg_num = 1,
.target_set = { 1, 2, 3 },
.cur_set = { 0, 0, 0 },
};
st_cli.pool_config[1] = (pool_config_t){
.exists = true,
.id = 1,
.name = "testpool",
.scheme = POOL_SCHEME_XOR,
.pg_size = 3,
.pg_minsize = 2,
.pg_count = 1,
.real_pg_count = 1,
};
report_pg_state(pgs[{ 1, 1 }]);
pg_counts[1] = 1;
report_pg_state(pgs[1]);
pg_count = 1;
}
bind_socket();
}
@ -62,8 +43,7 @@ void osd_t::init_cluster()
{
st_cli.tfd = tfd;
st_cli.log_level = log_level;
st_cli.on_change_osd_state_hook = [this](osd_num_t peer_osd) { on_change_osd_state_hook(peer_osd); };
st_cli.on_change_pg_history_hook = [this](pool_id_t pool_id, pg_num_t pg_num) { on_change_pg_history_hook(pool_id, pg_num); };
st_cli.on_change_osd_state_hook = [this](uint64_t peer_osd) { on_change_osd_state_hook(peer_osd); };
st_cli.on_change_hook = [this](json11::Json::object & changes) { on_change_etcd_state_hook(changes); };
st_cli.on_load_config_hook = [this](json11::Json::object & cfg) { on_load_config_hook(cfg); };
st_cli.load_pgs_checks_hook = [this]() { return on_load_pgs_checks_hook(); };
@ -103,7 +83,7 @@ void osd_t::parse_test_peer(std::string peer)
{ "addresses", json11::Json::array { addr } },
{ "port", port },
};
c_cli.connect_peer(peer_osd, st_cli.peer_states[peer_osd]);
c_cli.connect_peer(peer_osd, json11::Json::array { addr }, port);
}
json11::Json osd_t::get_osd_state()
@ -142,7 +122,7 @@ json11::Json osd_t::get_statistics()
}
st["host"] = self_state["host"];
json11::Json::object op_stats, subop_stats;
for (int i = OSD_OP_MIN; i <= OSD_OP_MAX; i++)
for (int i = 0; i <= OSD_OP_MAX; i++)
{
op_stats[osd_op_names[i]] = json11::Json::object {
{ "count", c_cli.stats.op_stat_count[i] },
@ -150,7 +130,7 @@ json11::Json osd_t::get_statistics()
{ "bytes", c_cli.stats.op_stat_bytes[i] },
};
}
for (int i = OSD_OP_MIN; i <= OSD_OP_MAX; i++)
for (int i = 0; i <= OSD_OP_MAX; i++)
{
subop_stats[osd_op_names[i]] = json11::Json::object {
{ "count", c_cli.stats.subop_stat_count[i] },
@ -179,47 +159,11 @@ void osd_t::report_statistics()
return;
}
etcd_reporting_stats = true;
// Report space usage statistics as a whole
// Maybe we'll report it using deltas if we tune for a lot of inodes at some point
json11::Json::object inode_space;
for (auto kv: bs->get_inode_space_stats())
{
inode_space[std::to_string(kv.first)] = kv.second;
}
json11::Json::object inode_ops;
for (auto kv: inode_stats)
{
inode_ops[std::to_string(kv.first)] = json11::Json::object {
{ "read", json11::Json::object {
{ "count", kv.second.op_count[INODE_STATS_READ] },
{ "usec", kv.second.op_sum[INODE_STATS_READ] },
{ "bytes", kv.second.op_bytes[INODE_STATS_READ] },
} },
{ "write", json11::Json::object {
{ "count", kv.second.op_count[INODE_STATS_WRITE] },
{ "usec", kv.second.op_sum[INODE_STATS_WRITE] },
{ "bytes", kv.second.op_bytes[INODE_STATS_WRITE] },
} },
{ "delete", json11::Json::object {
{ "count", kv.second.op_count[INODE_STATS_DELETE] },
{ "usec", kv.second.op_sum[INODE_STATS_DELETE] },
{ "bytes", kv.second.op_bytes[INODE_STATS_DELETE] },
} },
};
}
json11::Json::array txn = { json11::Json::object {
{ "request_put", json11::Json::object {
{ "key", base64_encode(st_cli.etcd_prefix+"/osd/stats/"+std::to_string(osd_num)) },
{ "value", base64_encode(get_statistics().dump()) },
} },
{ "request_put", json11::Json::object {
{ "key", base64_encode(st_cli.etcd_prefix+"/osd/space/"+std::to_string(osd_num)) },
{ "value", base64_encode(json11::Json(inode_space).dump()) },
} },
{ "request_put", json11::Json::object {
{ "key", base64_encode(st_cli.etcd_prefix+"/osd/inodestats/"+std::to_string(osd_num)) },
{ "value", base64_encode(json11::Json(inode_ops).dump()) },
} },
} }
} };
for (auto & p: pgs)
{
@ -238,7 +182,7 @@ void osd_t::report_statistics()
pg_stats["write_osd_set"] = pg.cur_set;
txn.push_back(json11::Json::object {
{ "request_put", json11::Json::object {
{ "key", base64_encode(st_cli.etcd_prefix+"/pg/stats/"+std::to_string(pg.pool_id)+"/"+std::to_string(pg.pg_num)) },
{ "key", base64_encode(st_cli.etcd_prefix+"/pg/stats/"+std::to_string(pg.pg_num)) },
{ "value", base64_encode(json11::Json(pg_stats).dump()) },
} }
});
@ -263,47 +207,20 @@ void osd_t::report_statistics()
});
}
void osd_t::on_change_osd_state_hook(osd_num_t peer_osd)
void osd_t::on_change_osd_state_hook(uint64_t peer_osd)
{
if (c_cli.wanted_peers.find(peer_osd) != c_cli.wanted_peers.end())
{
c_cli.connect_peer(peer_osd, st_cli.peer_states[peer_osd]);
c_cli.connect_peer(peer_osd, st_cli.peer_states[peer_osd]["addresses"], st_cli.peer_states[peer_osd]["port"].int64_value());
}
}
void osd_t::on_change_etcd_state_hook(json11::Json::object & changes)
{
// FIXME apply config changes in runtime (maybe, some)
if (run_primary)
{
apply_pg_count();
apply_pg_config();
}
}
void osd_t::on_change_pg_history_hook(pool_id_t pool_id, pg_num_t pg_num)
{
auto pg_it = pgs.find({
.pool_id = pool_id,
.pg_num = pg_num,
});
if (pg_it != pgs.end() && pg_it->second.epoch > pg_it->second.reported_epoch &&
st_cli.pool_config[pool_id].pg_config[pg_num].epoch >= pg_it->second.epoch)
{
pg_it->second.reported_epoch = st_cli.pool_config[pool_id].pg_config[pg_num].epoch;
object_id oid = { 0 };
bool first = true;
for (auto op: pg_it->second.write_queue)
{
if (first || oid != op.first)
{
oid = op.first;
first = false;
continue_primary_write(op.second);
}
}
}
}
void osd_t::on_load_config_hook(json11::Json::object & global_config)
{
@ -312,18 +229,13 @@ void osd_t::on_load_config_hook(json11::Json::object & global_config)
{
if (this->config.find(cfg_var.first) == this->config.end())
{
if (cfg_var.second.is_string())
{
// FIXME Convert int to str
osd_config[cfg_var.first] = cfg_var.second.string_value();
}
else
{
osd_config[cfg_var.first] = cfg_var.second.dump();
}
}
}
parse_config(osd_config);
bind_socket();
st_cli.start_etcd_watcher();
acquire_lease();
}
@ -420,7 +332,6 @@ void osd_t::create_osd_state()
{
st_cli.load_pgs();
}
report_statistics();
});
}
@ -512,56 +423,52 @@ void osd_t::on_load_pgs_hook(bool success)
void osd_t::apply_pg_count()
{
for (auto & pool_item: st_cli.pool_config)
pg_num_t pg_count = st_cli.pg_config.size();
if (pg_count > 0 && (st_cli.pg_config.begin()->first != 1 || std::prev(st_cli.pg_config.end())->first != pg_count))
{
if (pool_item.second.real_pg_count != 0 &&
pool_item.second.real_pg_count != pg_counts[pool_item.first])
printf("Invalid PG configuration: PG numbers don't cover the whole 1..%d range\n", pg_count);
force_stop(1);
return;
}
if (this->pg_count != 0 && this->pg_count != pg_count)
{
// Check that all pool PGs are offline. It is not allowed to change PG count when any PGs are online
// Check that all PGs are offline. It is not allowed to change PG count when any PGs are online
// The external tool must wait for all PGs to come down before changing PG count
// If it doesn't wait, a restarted OSD may apply the new count immediately which will lead to bugs
// So an OSD just dies if it detects PG count change while there are active PGs
int still_active = 0;
for (auto & kv: pgs)
{
if (kv.first.pool_id == pool_item.first && (kv.second.state & PG_ACTIVE))
if (kv.second.state & PG_ACTIVE)
{
still_active++;
}
}
if (still_active > 0)
{
printf(
"[OSD %lu] PG count change detected for pool %u (new is %lu, old is %u),"
" but %u PG(s) are still active. This is not allowed. Exiting\n",
this->osd_num, pool_item.first, pool_item.second.real_pg_count, pg_counts[pool_item.first], still_active
);
printf("[OSD %lu] PG count change detected, but %d PG(s) are still active. This is not allowed. Exiting\n", this->osd_num, still_active);
force_stop(1);
return;
}
}
this->pg_counts[pool_item.first] = pool_item.second.real_pg_count;
}
this->pg_count = pg_count;
}
void osd_t::apply_pg_config()
{
bool all_applied = true;
for (auto & pool_item: st_cli.pool_config)
{
auto pool_id = pool_item.first;
for (auto & kv: pool_item.second.pg_config)
for (auto & kv: st_cli.pg_config)
{
pg_num_t pg_num = kv.first;
auto & pg_cfg = kv.second;
bool take = pg_cfg.exists && pg_cfg.primary == this->osd_num &&
!pg_cfg.pause && (!pg_cfg.cur_primary || pg_cfg.cur_primary == this->osd_num);
auto pg_it = this->pgs.find({ .pool_id = pool_id, .pg_num = pg_num });
bool currently_taken = pg_it != this->pgs.end() && pg_it->second.state != PG_OFFLINE;
bool currently_taken = this->pgs.find(pg_num) != this->pgs.end() &&
this->pgs[pg_num].state != PG_OFFLINE;
if (currently_taken && !take)
{
// Stop this PG
stop_pg(pg_it->second);
stop_pg(pg_num);
}
else if (take)
{
@ -593,9 +500,9 @@ void osd_t::apply_pg_config()
}
if (currently_taken)
{
if (pg_it->second.state & (PG_ACTIVE | PG_INCOMPLETE | PG_PEERING))
if (this->pgs[pg_num].state & (PG_ACTIVE | PG_INCOMPLETE | PG_PEERING))
{
if (pg_it->second.target_set == pg_cfg.target_set)
if (this->pgs[pg_num].target_set == pg_cfg.target_set)
{
// No change in osd_set; history changes are ignored
continue;
@ -603,18 +510,18 @@ void osd_t::apply_pg_config()
else
{
// Stop PG, reapply change after stopping
stop_pg(pg_it->second);
stop_pg(pg_num);
all_applied = false;
continue;
}
}
else if (pg_it->second.state & PG_STOPPING)
else if (this->pgs[pg_num].state & PG_STOPPING)
{
// Reapply change after stopping
all_applied = false;
continue;
}
else if (pg_it->second.state & PG_STARTING)
else if (this->pgs[pg_num].state & PG_STARTING)
{
if (pg_cfg.cur_primary == this->osd_num)
{
@ -629,34 +536,19 @@ void osd_t::apply_pg_config()
}
else
{
throw std::runtime_error(
"Unexpected PG "+std::to_string(pool_id)+"/"+std::to_string(pg_num)+
" state: "+std::to_string(pg_it->second.state)
);
throw std::runtime_error("Unexpected PG "+std::to_string(pg_num)+" state: "+std::to_string(this->pgs[pg_num].state));
}
}
auto & pg = this->pgs[{ .pool_id = pool_id, .pg_num = pg_num }];
pg = (pg_t){
this->pgs[pg_num] = (pg_t){
.state = pg_cfg.cur_primary == this->osd_num ? PG_PEERING : PG_STARTING,
.scheme = pool_item.second.scheme,
.pg_cursize = 0,
.pg_size = pool_item.second.pg_size,
.pg_minsize = pool_item.second.pg_minsize,
.pg_data_size = pg.scheme == POOL_SCHEME_REPLICATED
? 1 : pool_item.second.pg_size - pool_item.second.parity_chunks,
.pool_id = pool_id,
.pg_num = pg_num,
.reported_epoch = pg_cfg.epoch,
.target_history = pg_cfg.target_history,
.all_peers = std::vector<osd_num_t>(all_peers.begin(), all_peers.end()),
.target_set = pg_cfg.target_set,
};
if (pg.scheme == POOL_SCHEME_JERASURE)
{
use_jerasure(pg.pg_size, pg.pg_data_size, true);
}
this->pg_state_dirty.insert({ .pool_id = pool_id, .pg_num = pg_num });
pg.print_state();
this->pg_state_dirty.insert(pg_num);
this->pgs[pg_num].print_state();
if (pg_cfg.cur_primary == this->osd_num)
{
// Add peers
@ -664,10 +556,10 @@ void osd_t::apply_pg_config()
{
if (pg_osd != this->osd_num && c_cli.osd_peer_fds.find(pg_osd) == c_cli.osd_peer_fds.end())
{
c_cli.connect_peer(pg_osd, st_cli.peer_states[pg_osd]);
c_cli.connect_peer(pg_osd, st_cli.peer_states[pg_osd]["addresses"], st_cli.peer_states[pg_osd]["port"].int64_value());
}
}
start_pg_peering(pg);
start_pg_peering(pg_num);
}
else
{
@ -676,7 +568,6 @@ void osd_t::apply_pg_config()
}
}
}
}
report_pg_states();
this->pg_config_applied = all_applied;
}
@ -687,7 +578,8 @@ void osd_t::report_pg_states()
{
return;
}
std::vector<std::pair<pool_pg_num_t,bool>> reporting_pgs;
etcd_reporting_pg_state = true;
std::vector<std::pair<pg_num_t,bool>> reporting_pgs;
json11::Json::array checks;
json11::Json::array success;
json11::Json::array failure;
@ -699,23 +591,9 @@ void osd_t::report_pg_states()
continue;
}
auto & pg = pg_it->second;
reporting_pgs.push_back({ *it, pg.history_changed });
std::string state_key_base64 = base64_encode(st_cli.etcd_prefix+"/pg/state/"+std::to_string(pg.pool_id)+"/"+std::to_string(pg.pg_num));
bool pg_state_exists = false;
if (pg.state != PG_STARTING)
{
auto pool_it = st_cli.pool_config.find(pg.pool_id);
if (pool_it != st_cli.pool_config.end())
{
auto pg_it = pool_it->second.pg_config.find(pg.pg_num);
if (pg_it != pool_it->second.pg_config.end() &&
pg_it->second.cur_state != 0)
{
pg_state_exists = true;
}
}
}
if (!pg_state_exists)
reporting_pgs.push_back({ pg.pg_num, pg.history_changed });
std::string state_key_base64 = base64_encode(st_cli.etcd_prefix+"/pg/state/"+std::to_string(pg.pg_num));
if (pg.state == PG_STARTING)
{
// Check that the PG key does not exist
// Failed check indicates an unsuccessful PG lock attempt in this case
@ -727,7 +605,9 @@ void osd_t::report_pg_states()
}
else
{
// Check that the key is ours if it already exists
// Check that the key is ours
// Failed check indicates success for OFFLINE pgs (PG lock is already deleted)
// and an unexpected race condition for started pgs (PG lock is held by someone else)
checks.push_back(json11::Json::object {
{ "target", "LEASE" },
{ "lease", etcd_lease_id },
@ -754,7 +634,7 @@ void osd_t::report_pg_states()
}
success.push_back(json11::Json::object {
{ "request_put", json11::Json::object {
{ "key", state_key_base64 },
{ "key", base64_encode(st_cli.etcd_prefix+"/pg/state/"+std::to_string(pg.pg_num)) },
{ "value", base64_encode(json11::Json(json11::Json::object {
{ "primary", this->osd_num },
{ "state", pg_state_keywords },
@ -765,27 +645,27 @@ void osd_t::report_pg_states()
});
if (pg.history_changed)
{
// Prevent race conditions (for the case when the monitor is updating this key at the same time)
pg.history_changed = false;
std::string history_key = base64_encode(st_cli.etcd_prefix+"/pg/history/"+std::to_string(pg.pool_id)+"/"+std::to_string(pg.pg_num));
json11::Json::object history_value = {
{ "epoch", pg.epoch },
{ "all_peers", pg.all_peers },
{ "osd_sets", pg.target_history },
};
checks.push_back(json11::Json::object {
{ "target", "MOD" },
{ "key", history_key },
{ "result", "LESS" },
{ "mod_revision", st_cli.etcd_watch_revision+1 },
});
if (pg.state == PG_ACTIVE)
{
success.push_back(json11::Json::object {
{ "request_put", json11::Json::object {
{ "key", history_key },
{ "value", base64_encode(json11::Json(history_value).dump()) },
{ "request_delete_range", json11::Json::object {
{ "key", base64_encode(st_cli.etcd_prefix+"/pg/history/"+std::to_string(pg.pg_num)) },
} }
});
}
else if (pg.state == (PG_ACTIVE|PG_LEFT_ON_DEAD))
{
success.push_back(json11::Json::object {
{ "request_put", json11::Json::object {
{ "key", base64_encode(st_cli.etcd_prefix+"/pg/history/"+std::to_string(pg.pg_num)) },
{ "value", base64_encode(json11::Json(json11::Json::object {
{ "all_peers", pg.all_peers },
}).dump()) },
} }
});
}
}
}
failure.push_back(json11::Json::object {
{ "request_range", json11::Json::object {
@ -794,7 +674,6 @@ void osd_t::report_pg_states()
});
}
pg_state_dirty.clear();
etcd_reporting_pg_state = true;
st_cli.etcd_txn(json11::Json::object {
{ "compare", checks }, { "success", success }, { "failure", failure }
}, ETCD_QUICK_TIMEOUT, [this, reporting_pgs](std::string err, json11::Json data)
@ -820,26 +699,17 @@ void osd_t::report_pg_states()
if (res["kvs"].array_items().size())
{
auto kv = st_cli.parse_etcd_kv(res["kvs"][0]);
if (kv.key.substr(st_cli.etcd_prefix.length()+10) == st_cli.etcd_prefix+"/pg/state/")
{
pool_id_t pool_id = 0;
pg_num_t pg_num = 0;
char null_byte = 0;
sscanf(kv.key.c_str() + st_cli.etcd_prefix.length()+10, "%u/%u%c", &pool_id, &pg_num, &null_byte);
if (null_byte == 0)
{
auto pg_it = pgs.find({ .pool_id = pool_id, .pg_num = pg_num });
pg_num_t pg_num = stoull_full(kv.key.substr(st_cli.etcd_prefix.length()+10));
auto pg_it = pgs.find(pg_num);
if (pg_it != pgs.end() && pg_it->second.state != PG_OFFLINE && pg_it->second.state != PG_STARTING)
{
// Live PG state update failed
printf("Failed to report state of pool %u PG %u which is live. Race condition detected, exiting\n", pool_id, pg_num);
printf("Failed to report state of PG %u which is live. Race condition detected, exiting\n", pg_num);
force_stop(1);
return;
}
}
}
}
}
// Retry after a short pause (hope we'll get some updates and update PG states accordingly)
tfd->set_timer(500, false, [this](int) { report_pg_states(); });
}
@ -849,18 +719,15 @@ void osd_t::report_pg_states()
for (auto pp: reporting_pgs)
{
auto pg_it = this->pgs.find(pp.first);
if (pg_it != this->pgs.end() &&
pg_it->second.state == PG_OFFLINE &&
pg_state_dirty.find(pp.first) == pg_state_dirty.end())
if (pg_it != this->pgs.end())
{
// Forget offline PGs after reporting their state
if (pg_it->second.scheme == POOL_SCHEME_JERASURE)
if (pg_it->second.state == PG_OFFLINE)
{
use_jerasure(pg_it->second.pg_size, pg_it->second.pg_data_size, false);
}
// Remove offline PGs after reporting their state
this->pgs.erase(pg_it);
}
}
}
// Push other PG state updates, if any
report_pg_states();
if (!this->pg_state_dirty.size())

View File

@ -1,12 +1,10 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "osd.h"
#define FLUSH_BATCH 512
void osd_t::submit_pg_flush_ops(pg_t & pg)
void osd_t::submit_pg_flush_ops(pg_num_t pg_num)
{
pg_t & pg = pgs[pg_num];
pg_flush_batch_t *fb = new pg_flush_batch_t();
pg.flush_batch = fb;
auto it = pg.flush_actions.begin(), prev_it = pg.flush_actions.begin();
@ -47,7 +45,7 @@ void osd_t::submit_pg_flush_ops(pg_t & pg)
if (l.second.size() > 0)
{
fb->flush_ops++;
submit_flush_op(pg.pool_id, pg.pg_num, fb, true, l.first, l.second.size(), l.second.data());
submit_flush_op(pg.pg_num, fb, true, l.first, l.second.size(), l.second.data());
}
}
for (auto & l: fb->stable_lists)
@ -55,15 +53,14 @@ void osd_t::submit_pg_flush_ops(pg_t & pg)
if (l.second.size() > 0)
{
fb->flush_ops++;
submit_flush_op(pg.pool_id, pg.pg_num, fb, false, l.first, l.second.size(), l.second.data());
submit_flush_op(pg.pg_num, fb, false, l.first, l.second.size(), l.second.data());
}
}
}
void osd_t::handle_flush_op(bool rollback, pool_id_t pool_id, pg_num_t pg_num, pg_flush_batch_t *fb, osd_num_t peer_osd, int retval)
void osd_t::handle_flush_op(bool rollback, pg_num_t pg_num, pg_flush_batch_t *fb, osd_num_t peer_osd, int retval)
{
pool_pg_num_t pg_id = { .pool_id = pool_id, .pg_num = pg_num };
if (pgs.find(pg_id) == pgs.end() || pgs[pg_id].flush_batch != fb)
if (pgs.find(pg_num) == pgs.end() || pgs[pg_num].flush_batch != fb)
{
// Throw the result away
return;
@ -81,12 +78,9 @@ void osd_t::handle_flush_op(bool rollback, pool_id_t pool_id, pg_num_t pg_num, p
}
else
{
printf("Error while doing flush on OSD %lu: %d (%s)\n", osd_num, retval, strerror(-retval));
auto fd_it = c_cli.osd_peer_fds.find(peer_osd);
if (fd_it != c_cli.osd_peer_fds.end())
{
c_cli.stop_client(fd_it->second);
}
printf("Error while doing flush on OSD %lu: %s\n", osd_num, strerror(-retval));
assert(c_cli.osd_peer_fds.find(peer_osd) != c_cli.osd_peer_fds.end());
c_cli.stop_client(c_cli.osd_peer_fds[peer_osd]);
return;
}
}
@ -95,7 +89,7 @@ void osd_t::handle_flush_op(bool rollback, pool_id_t pool_id, pg_num_t pg_num, p
{
// This flush batch is done
std::vector<osd_op_t*> continue_ops;
auto & pg = pgs.at(pg_id);
auto & pg = pgs[pg_num];
auto it = pg.flush_actions.begin(), prev_it = it;
auto erase_start = it;
while (1)
@ -156,22 +150,22 @@ void osd_t::handle_flush_op(bool rollback, pool_id_t pool_id, pg_num_t pg_num, p
}
}
void osd_t::submit_flush_op(pool_id_t pool_id, pg_num_t pg_num, pg_flush_batch_t *fb, bool rollback, osd_num_t peer_osd, int count, obj_ver_id *data)
void osd_t::submit_flush_op(pg_num_t pg_num, pg_flush_batch_t *fb, bool rollback, osd_num_t peer_osd, int count, obj_ver_id *data)
{
osd_op_t *op = new osd_op_t();
// Copy buffer so it gets freed along with the operation
op->buf = malloc_or_die(sizeof(obj_ver_id) * count);
op->buf = malloc(sizeof(obj_ver_id) * count);
memcpy(op->buf, data, sizeof(obj_ver_id) * count);
if (peer_osd == this->osd_num)
{
// local
clock_gettime(CLOCK_REALTIME, &op->tv_begin);
op->bs_op = new blockstore_op_t((blockstore_op_t){
op->bs_op = new blockstore_op_t({
.opcode = (uint64_t)(rollback ? BS_OP_ROLLBACK : BS_OP_STABLE),
.callback = [this, op, pool_id, pg_num, fb](blockstore_op_t *bs_op)
.callback = [this, op, pg_num, fb](blockstore_op_t *bs_op)
{
add_bs_subop_stats(op);
handle_flush_op(bs_op->opcode == BS_OP_ROLLBACK, pool_id, pg_num, fb, this->osd_num, bs_op->retval);
handle_flush_op(bs_op->opcode == BS_OP_ROLLBACK, pg_num, fb, this->osd_num, bs_op->retval);
delete op->bs_op;
op->bs_op = NULL;
delete op;
@ -186,21 +180,22 @@ void osd_t::submit_flush_op(pool_id_t pool_id, pg_num_t pg_num, pg_flush_batch_t
// Peer
int peer_fd = c_cli.osd_peer_fds[peer_osd];
op->op_type = OSD_OP_OUT;
op->iov.push_back(op->buf, count * sizeof(obj_ver_id));
op->send_list.push_back(op->req.buf, OSD_PACKET_SIZE);
op->send_list.push_back(op->buf, count * sizeof(obj_ver_id));
op->peer_fd = peer_fd;
op->req = (osd_any_op_t){
op->req = {
.sec_stab = {
.header = {
.magic = SECONDARY_OSD_OP_MAGIC,
.id = c_cli.next_subop_id++,
.opcode = (uint64_t)(rollback ? OSD_OP_SEC_ROLLBACK : OSD_OP_SEC_STABILIZE),
.opcode = (uint64_t)(rollback ? OSD_OP_SECONDARY_ROLLBACK : OSD_OP_SECONDARY_STABILIZE),
},
.len = count * sizeof(obj_ver_id),
},
};
op->callback = [this, pool_id, pg_num, fb, peer_osd](osd_op_t *op)
op->callback = [this, pg_num, fb, peer_osd](osd_op_t *op)
{
handle_flush_op(op->req.hdr.opcode == OSD_OP_SEC_ROLLBACK, pool_id, pg_num, fb, peer_osd, op->reply.hdr.retval);
handle_flush_op(op->req.hdr.opcode == OSD_OP_SECONDARY_ROLLBACK, pg_num, fb, peer_osd, op->reply.hdr.retval);
delete op;
};
c_cli.outbox_push(op);
@ -208,8 +203,6 @@ void osd_t::submit_flush_op(pool_id_t pool_id, pg_num_t pg_num, pg_flush_batch_t
}
bool osd_t::pick_next_recovery(osd_recovery_op_t &op)
{
if (!no_recovery)
{
for (auto pg_it = pgs.begin(); pg_it != pgs.end(); pg_it++)
{
@ -220,15 +213,13 @@ bool osd_t::pick_next_recovery(osd_recovery_op_t &op)
if (recovery_ops.find(obj_it->first) == recovery_ops.end())
{
op.degraded = true;
op.pg_num = pg_it->first;
op.oid = obj_it->first;
return true;
}
}
}
}
}
if (!no_rebalance)
{
for (auto pg_it = pgs.begin(); pg_it != pgs.end(); pg_it++)
{
if ((pg_it->second.state & (PG_ACTIVE | PG_HAS_MISPLACED)) == (PG_ACTIVE | PG_HAS_MISPLACED))
@ -238,13 +229,13 @@ bool osd_t::pick_next_recovery(osd_recovery_op_t &op)
if (recovery_ops.find(obj_it->first) == recovery_ops.end())
{
op.degraded = false;
op.pg_num = pg_it->first;
op.oid = obj_it->first;
return true;
}
}
}
}
}
return false;
}
@ -252,7 +243,7 @@ void osd_t::submit_recovery_op(osd_recovery_op_t *op)
{
op->osd_op = new osd_op_t();
op->osd_op->op_type = OSD_OP_OUT;
op->osd_op->req = (osd_any_op_t){
op->osd_op->req = {
.rw = {
.header = {
.magic = SECONDARY_OSD_OP_MAGIC,
@ -264,44 +255,24 @@ void osd_t::submit_recovery_op(osd_recovery_op_t *op)
.len = 0,
},
};
if (log_level > 2)
{
printf("Submitting recovery operation for %lx:%lx\n", op->oid.inode, op->oid.stripe);
}
op->osd_op->callback = [this, op](osd_op_t *osd_op)
{
// Don't sync the write, it will be synced by our regular sync coroutine
if (osd_op->reply.hdr.retval < 0)
{
// Error recovering object
if (osd_op->reply.hdr.retval == -EPIPE)
{
// PG is stopped or one of the OSDs is gone, error is harmless
printf(
"Recovery operation failed with object %lx:%lx (PG %u/%u)\n",
op->oid.inode, op->oid.stripe, INODE_POOL(op->oid.inode),
map_to_pg(op->oid, st_cli.pool_config.at(INODE_POOL(op->oid.inode)).pg_stripe_size)
);
}
else
{
throw std::runtime_error("Failed to recover an object");
}
}
// CAREFUL! op = &recovery_ops[op->oid]. Don't access op->* after recovery_ops.erase()
op->osd_op = NULL;
recovery_ops.erase(op->oid);
delete osd_op;
if (immediate_commit != IMMEDIATE_ALL)
{
recovery_done++;
if (recovery_done >= recovery_sync_batch)
{
// Force sync every <recovery_sync_batch> operations
// This is required not to pile up an excessive amount of delete operations
autosync();
recovery_done = 0;
}
}
op->osd_op = NULL;
continue_recovery();
};
exec_op(op->osd_op);

4
osd_id.h Normal file
View File

@ -0,0 +1,4 @@
#pragma once
typedef uint64_t osd_num_t;
typedef uint32_t pg_num_t;

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "osd.h"
#include <signal.h>
@ -21,8 +18,6 @@ static void handle_sigint(int sig)
int main(int narg, char *args[])
{
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stderr, NULL, _IONBF, 0);
if (sizeof(osd_any_op_t) > OSD_PACKET_SIZE ||
sizeof(osd_any_reply_t) > OSD_PACKET_SIZE)
{
@ -41,13 +36,16 @@ int main(int narg, char *args[])
signal(SIGINT, handle_sigint);
signal(SIGTERM, handle_sigint);
ring_loop_t *ringloop = new ring_loop_t(512);
osd = new osd_t(config, ringloop);
// FIXME: Create Blockstore from on-disk superblock config and check it against the OSD cluster config
blockstore_t *bs = new blockstore_t(config, ringloop);
osd = new osd_t(config, bs, ringloop);
while (1)
{
ringloop->loop();
ringloop->wait();
}
delete osd;
delete bs;
delete ringloop;
return 0;
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
#pragma once
#include "object_id.h"
@ -13,22 +10,20 @@
#define OSD_PACKET_SIZE 0x80
// Opcodes
#define OSD_OP_MIN 1
#define OSD_OP_SEC_READ 1
#define OSD_OP_SEC_WRITE 2
#define OSD_OP_SEC_WRITE_STABLE 3
#define OSD_OP_SEC_SYNC 4
#define OSD_OP_SEC_STABILIZE 5
#define OSD_OP_SEC_ROLLBACK 6
#define OSD_OP_SEC_DELETE 7
#define OSD_OP_TEST_SYNC_STAB_ALL 8
#define OSD_OP_SEC_LIST 9
#define OSD_OP_SHOW_CONFIG 10
#define OSD_OP_READ 11
#define OSD_OP_WRITE 12
#define OSD_OP_SYNC 13
#define OSD_OP_DELETE 14
#define OSD_OP_PING 15
#define OSD_OP_MAX 15
#define OSD_OP_SECONDARY_READ 1
#define OSD_OP_SECONDARY_WRITE 2
#define OSD_OP_SECONDARY_SYNC 3
#define OSD_OP_SECONDARY_STABILIZE 4
#define OSD_OP_SECONDARY_ROLLBACK 5
#define OSD_OP_SECONDARY_DELETE 6
#define OSD_OP_TEST_SYNC_STAB_ALL 7
#define OSD_OP_SECONDARY_LIST 8
#define OSD_OP_SHOW_CONFIG 9
#define OSD_OP_READ 10
#define OSD_OP_WRITE 11
#define OSD_OP_SYNC 12
#define OSD_OP_DELETE 13
#define OSD_OP_MAX 13
// Alignment & limit for read/write operations
#ifndef MEM_ALIGNMENT
#define MEM_ALIGNMENT 512
@ -71,9 +66,6 @@ struct __attribute__((__packed__)) osd_op_secondary_rw_t
uint32_t offset;
// length
uint32_t len;
// bitmap/attribute length - bitmap comes after header, but before data
uint32_t attr_len;
uint32_t pad0;
};
struct __attribute__((__packed__)) osd_reply_secondary_rw_t
@ -81,9 +73,6 @@ struct __attribute__((__packed__)) osd_reply_secondary_rw_t
osd_reply_header_t header;
// for reads and writes: assigned or read version number
uint64_t version;
// for reads: bitmap/attribute length (just to double-check)
uint32_t attr_len;
uint32_t pad0;
};
// delete object on the secondary OSD
@ -145,10 +134,7 @@ struct __attribute__((__packed__)) osd_op_secondary_list_t
osd_op_header_t header;
// placement group total number and total count
pg_num_t list_pg, pg_count;
// size of an area that maps to one PG continuously
uint64_t pg_stripe_size;
// inode range (used to select pools)
uint64_t min_inode, max_inode;
};
struct __attribute__((__packed__)) osd_reply_secondary_list_t
@ -160,6 +146,7 @@ struct __attribute__((__packed__)) osd_reply_secondary_list_t
};
// read or write to the primary OSD (must be within individual stripe)
// FIXME: allow to return used block bitmap (required for snapshots)
struct __attribute__((__packed__)) osd_op_rw_t
{
osd_op_header_t header;
@ -174,9 +161,6 @@ struct __attribute__((__packed__)) osd_op_rw_t
struct __attribute__((__packed__)) osd_reply_rw_t
{
osd_reply_header_t header;
// for reads: bitmap length
uint32_t bitmap_len;
uint32_t pad0;
};
// sync to the primary OSD
@ -218,5 +202,3 @@ union osd_any_reply_t
osd_reply_sync_t sync;
uint8_t buf[OSD_PACKET_SIZE];
};
extern const char* osd_op_names[];

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include <netinet/tcp.h>
#include <sys/epoll.h>
@ -29,7 +26,7 @@ void osd_t::handle_peers()
degraded_objects += p.second.degraded_objects.size();
if ((p.second.state & (PG_ACTIVE | PG_HAS_UNCLEAN)) == (PG_ACTIVE | PG_HAS_UNCLEAN))
peering_state = peering_state | OSD_FLUSHING_PGS;
else if (p.second.state & PG_ACTIVE)
else
peering_state = peering_state | OSD_RECOVERING;
}
else
@ -53,7 +50,7 @@ void osd_t::handle_peers()
{
if (!p.second.flush_batch)
{
submit_pg_flush_ops(p.second);
submit_pg_flush_ops(p.first);
}
still = true;
}
@ -91,20 +88,23 @@ void osd_t::repeer_pgs(osd_num_t peer_osd)
if (repeer)
{
// Repeer this pg
printf("[PG %u/%u] Repeer because of OSD %lu\n", p.second.pool_id, p.second.pg_num, peer_osd);
start_pg_peering(p.second);
printf("[PG %u] Repeer because of OSD %lu\n", p.second.pg_num, peer_osd);
start_pg_peering(p.second.pg_num);
}
}
}
}
// Reset PG state (when peering or stopping)
void osd_t::reset_pg(pg_t & pg)
// Repeer on each connect/disconnect peer event
void osd_t::start_pg_peering(pg_num_t pg_num)
{
auto & pg = pgs[pg_num];
pg.state = PG_PEERING;
this->peering_state |= OSD_PEERING_PGS;
report_pg_state(pg);
// Reset PG state
pg.cur_peers.clear();
pg.state_dict.clear();
copies_to_delete_after_sync_count -= pg.copies_to_delete_after_sync.size();
pg.copies_to_delete_after_sync.clear();
incomplete_objects -= pg.incomplete_objects.size();
misplaced_objects -= pg.misplaced_objects.size();
degraded_objects -= pg.degraded_objects.size();
@ -120,44 +120,20 @@ void osd_t::reset_pg(pg_t & pg)
pg.flush_batch = NULL;
for (auto p: pg.write_queue)
{
cancel_primary_write(p.second);
finish_op(p.second, -EPIPE);
}
pg.write_queue.clear();
uint64_t pg_stripe_size = st_cli.pool_config[pg.pool_id].pg_stripe_size;
for (auto it = unstable_writes.begin(); it != unstable_writes.end(); )
{
// Forget this PG's unstable writes
if (INODE_POOL(it->first.oid.inode) == pg.pool_id && map_to_pg(it->first.oid, pg_stripe_size) == pg.pg_num)
pg_num_t n = (it->first.oid.inode + it->first.oid.stripe / pg_stripe_size) % pg_count + 1;
if (n == pg.pg_num)
unstable_writes.erase(it++);
else
it++;
}
dirty_pgs.erase({ .pool_id = pg.pool_id, .pg_num = pg.pg_num });
}
// Repeer on each connect/disconnect peer event
void osd_t::start_pg_peering(pg_t & pg)
{
pg.state = PG_PEERING;
this->peering_state |= OSD_PEERING_PGS;
reset_pg(pg);
report_pg_state(pg);
// Drop connections of clients who have this PG in dirty_pgs
if (immediate_commit != IMMEDIATE_ALL)
{
std::vector<int> to_stop;
for (auto & cp: c_cli.clients)
{
if (cp.second->dirty_pgs.find({ .pool_id = pg.pool_id, .pg_num = pg.pg_num }) != cp.second->dirty_pgs.end())
{
to_stop.push_back(cp.first);
}
}
for (auto peer_fd: to_stop)
{
c_cli.stop_client(peer_fd);
}
}
pg.inflight = 0;
dirty_pgs.erase(pg.pg_num);
// Calculate current write OSD set
pg.pg_cursize = 0;
pg.cur_set.resize(pg.target_set.size());
@ -182,25 +158,19 @@ void osd_t::start_pg_peering(pg_t & pg)
// (PG history is kept up to the latest active+clean state)
for (auto & history_set: pg.target_history)
{
bool found = true;
bool found = false;
for (auto history_osd: history_set)
{
if (history_osd != 0)
{
found = false;
if (history_osd == this->osd_num ||
c_cli.osd_peer_fds.find(history_osd) != c_cli.osd_peer_fds.end())
if (history_osd != 0 && c_cli.osd_peer_fds.find(history_osd) != c_cli.osd_peer_fds.end())
{
found = true;
break;
}
}
}
if (!found)
{
pg.state = PG_INCOMPLETE;
report_pg_state(pg);
return;
}
}
}
@ -208,7 +178,6 @@ void osd_t::start_pg_peering(pg_t & pg)
{
pg.state = PG_INCOMPLETE;
report_pg_state(pg);
return;
}
std::set<osd_num_t> cur_peers;
for (auto pg_osd: pg.all_peers)
@ -219,7 +188,7 @@ void osd_t::start_pg_peering(pg_t & pg)
}
else if (c_cli.wanted_peers.find(pg_osd) == c_cli.wanted_peers.end())
{
c_cli.connect_peer(pg_osd, st_cli.peer_states[pg_osd]);
c_cli.connect_peer(pg_osd, st_cli.peer_states[pg_osd]["addresses"], st_cli.peer_states[pg_osd]["port"].int64_value());
}
}
pg.cur_peers.insert(pg.cur_peers.begin(), cur_peers.begin(), cur_peers.end());
@ -232,7 +201,8 @@ void osd_t::start_pg_peering(pg_t & pg)
{
// Discard the result after completion, which, chances are, will be unsuccessful
discard_list_subop(it->second);
pg.peering_state->list_ops.erase(it++);
pg.peering_state->list_ops.erase(it);
it = pg.peering_state->list_ops.begin();
}
else
it++;
@ -245,7 +215,8 @@ void osd_t::start_pg_peering(pg_t & pg)
{
free(it->second.buf);
}
pg.peering_state->list_results.erase(it++);
pg.peering_state->list_results.erase(it);
it = pg.peering_state->list_results.begin();
}
else
it++;
@ -263,7 +234,6 @@ void osd_t::start_pg_peering(pg_t & pg)
if (!pg.peering_state)
{
pg.peering_state = new pg_peering_state_t();
pg.peering_state->pool_id = pg.pool_id;
pg.peering_state->pg_num = pg.pg_num;
}
for (osd_num_t peer_osd: cur_peers)
@ -318,13 +288,14 @@ void osd_t::submit_sync_and_list_subop(osd_num_t role_osd, pg_peering_state_t *p
auto & cl = c_cli.clients.at(c_cli.osd_peer_fds[role_osd]);
osd_op_t *op = new osd_op_t();
op->op_type = OSD_OP_OUT;
op->peer_fd = cl->peer_fd;
op->req = (osd_any_op_t){
op->send_list.push_back(op->req.buf, OSD_PACKET_SIZE);
op->peer_fd = cl.peer_fd;
op->req = {
.sec_sync = {
.header = {
.magic = SECONDARY_OSD_OP_MAGIC,
.id = c_cli.next_subop_id++,
.opcode = OSD_OP_SEC_SYNC,
.opcode = OSD_OP_SECONDARY_SYNC,
},
},
};
@ -359,10 +330,8 @@ void osd_t::submit_list_subop(osd_num_t role_osd, pg_peering_state_t *ps)
clock_gettime(CLOCK_REALTIME, &op->tv_begin);
op->bs_op = new blockstore_op_t();
op->bs_op->opcode = BS_OP_LIST;
op->bs_op->oid.stripe = st_cli.pool_config[ps->pool_id].pg_stripe_size;
op->bs_op->oid.inode = ((uint64_t)ps->pool_id << (64 - POOL_ID_BITS));
op->bs_op->version = ((uint64_t)(ps->pool_id+1) << (64 - POOL_ID_BITS)) - 1;
op->bs_op->len = pg_counts[ps->pool_id];
op->bs_op->oid.stripe = pg_stripe_size;
op->bs_op->len = pg_count;
op->bs_op->offset = ps->pg_num-1;
op->bs_op->callback = [this, ps, op, role_osd](blockstore_op_t *bs_op)
{
@ -372,8 +341,8 @@ void osd_t::submit_list_subop(osd_num_t role_osd, pg_peering_state_t *ps)
}
add_bs_subop_stats(op);
printf(
"[PG %u/%u] Got object list from OSD %lu (local): %d object versions (%lu of them stable)\n",
ps->pool_id, ps->pg_num, role_osd, bs_op->retval, bs_op->version
"[PG %u] Got object list from OSD %lu (local): %d object versions (%lu of them stable)\n",
ps->pg_num, role_osd, bs_op->retval, bs_op->version
);
ps->list_results[role_osd] = {
.buf = (obj_ver_id*)op->bs_op->buf,
@ -393,19 +362,18 @@ void osd_t::submit_list_subop(osd_num_t role_osd, pg_peering_state_t *ps)
// Peer
osd_op_t *op = new osd_op_t();
op->op_type = OSD_OP_OUT;
op->send_list.push_back(op->req.buf, OSD_PACKET_SIZE);
op->peer_fd = c_cli.osd_peer_fds[role_osd];
op->req = (osd_any_op_t){
op->req = {
.sec_list = {
.header = {
.magic = SECONDARY_OSD_OP_MAGIC,
.id = c_cli.next_subop_id++,
.opcode = OSD_OP_SEC_LIST,
.opcode = OSD_OP_SECONDARY_LIST,
},
.list_pg = ps->pg_num,
.pg_count = pg_counts[ps->pool_id],
.pg_stripe_size = st_cli.pool_config[ps->pool_id].pg_stripe_size,
.min_inode = ((uint64_t)(ps->pool_id) << (64 - POOL_ID_BITS)),
.max_inode = ((uint64_t)(ps->pool_id+1) << (64 - POOL_ID_BITS)) - 1,
.pg_count = pg_count,
.pg_stripe_size = pg_stripe_size,
},
};
op->callback = [this, ps, role_osd](osd_op_t *op)
@ -419,8 +387,8 @@ void osd_t::submit_list_subop(osd_num_t role_osd, pg_peering_state_t *ps)
return;
}
printf(
"[PG %u/%u] Got object list from OSD %lu: %ld object versions (%lu of them stable)\n",
ps->pool_id, ps->pg_num, role_osd, op->reply.hdr.retval, op->reply.sec_list.stable_count
"[PG %u] Got object list from OSD %lu: %ld object versions (%lu of them stable)\n",
ps->pg_num, role_osd, op->reply.hdr.retval, op->reply.sec_list.stable_count
);
ps->list_results[role_osd] = {
.buf = (obj_ver_id*)op->buf,
@ -461,16 +429,22 @@ void osd_t::discard_list_subop(osd_op_t *list_op)
}
}
bool osd_t::stop_pg(pg_t & pg)
bool osd_t::stop_pg(pg_num_t pg_num)
{
auto pg_it = pgs.find(pg_num);
if (pg_it == pgs.end())
{
return false;
}
auto & pg = pg_it->second;
if (pg.peering_state)
{
// Stop peering
for (auto it = pg.peering_state->list_ops.begin(); it != pg.peering_state->list_ops.end(); it++)
for (auto it = pg.peering_state->list_ops.begin(); it != pg.peering_state->list_ops.end();)
{
discard_list_subop(it->second);
}
for (auto it = pg.peering_state->list_results.begin(); it != pg.peering_state->list_results.end(); it++)
for (auto it = pg.peering_state->list_results.begin(); it != pg.peering_state->list_results.end();)
{
if (it->second.buf)
{
@ -480,19 +454,12 @@ bool osd_t::stop_pg(pg_t & pg)
delete pg.peering_state;
pg.peering_state = NULL;
}
if (pg.state & (PG_STOPPING | PG_OFFLINE))
if (!(pg.state & PG_ACTIVE))
{
return false;
}
if (!(pg.state & PG_ACTIVE))
{
finish_stop_pg(pg);
return true;
}
pg.state = pg.state & ~PG_ACTIVE | PG_STOPPING;
if (pg.inflight == 0 && !pg.flush_batch &&
// We must either forget all PG's unstable writes or wait for it to become clean
dirty_pgs.find({ .pool_id = pg.pool_id, .pg_num = pg.pg_num }) == dirty_pgs.end())
if (pg.inflight == 0 && !pg.flush_batch)
{
finish_stop_pg(pg);
}
@ -506,14 +473,13 @@ bool osd_t::stop_pg(pg_t & pg)
void osd_t::finish_stop_pg(pg_t & pg)
{
pg.state = PG_OFFLINE;
reset_pg(pg);
report_pg_state(pg);
}
void osd_t::report_pg_state(pg_t & pg)
{
pg.print_state();
this->pg_state_dirty.insert({ .pool_id = pg.pool_id, .pg_num = pg.pg_num });
this->pg_state_dirty.insert(pg.pg_num);
if (pg.state == PG_ACTIVE && (pg.target_history.size() > 0 || pg.all_peers.size() > pg.target_set.size()))
{
// Clear history of active+clean PGs

View File

@ -1,7 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include <unordered_map>
#include "osd_peering_pg.h"
struct obj_ver_role
@ -37,7 +33,6 @@ struct obj_piece_ver_t
struct pg_obj_state_check_t
{
pg_t *pg;
bool replicated = false;
std::vector<obj_ver_role> list;
int list_pos;
int obj_start = 0, obj_end = 0, ver_start = 0, ver_end = 0;
@ -46,7 +41,7 @@ struct pg_obj_state_check_t
uint64_t last_ver = 0;
uint64_t target_ver = 0;
uint64_t n_copies = 0, has_roles = 0, n_roles = 0, n_stable = 0, n_mismatched = 0;
uint64_t n_unstable = 0, n_invalid = 0;
uint64_t n_unstable = 0, n_buggy = 0;
pg_osd_set_t osd_set;
int log_level;
@ -78,12 +73,6 @@ void pg_obj_state_check_t::walk()
{
finish_object();
}
if (pg->state & PG_HAS_INVALID)
{
// Stop PGs with "invalid" objects
pg->state = PG_INCOMPLETE | PG_HAS_INVALID;
return;
}
if (pg->pg_cursize < pg->pg_size)
{
pg->state |= PG_DEGRADED;
@ -103,12 +92,12 @@ void pg_obj_state_check_t::start_object()
target_ver = 0;
ver_start = list_pos;
has_roles = n_copies = n_roles = n_stable = n_mismatched = 0;
n_unstable = n_invalid = 0;
n_unstable = n_buggy = 0;
}
void pg_obj_state_check_t::handle_version()
{
if (!target_ver && last_ver != list[list_pos].version && (n_stable > 0 || n_roles >= pg->pg_data_size))
if (!target_ver && last_ver != list[list_pos].version && (n_stable > 0 || n_roles >= pg->pg_minsize))
{
// Version is either stable or recoverable
target_ver = last_ver;
@ -122,11 +111,11 @@ void pg_obj_state_check_t::handle_version()
has_roles = n_copies = n_roles = n_stable = n_mismatched = 0;
last_ver = list[list_pos].version;
}
unsigned replica = (list[list_pos].oid.stripe & STRIPE_MASK);
int replica = (list[list_pos].oid.stripe & STRIPE_MASK);
n_copies++;
if (replicated && replica > 0 || replica >= pg->pg_size)
if (replica >= pg->pg_size)
{
n_invalid++;
n_buggy++;
}
else
{
@ -134,23 +123,6 @@ void pg_obj_state_check_t::handle_version()
{
n_stable++;
}
if (replicated)
{
int i;
for (i = 0; i < pg->cur_set.size(); i++)
{
if (pg->cur_set[i] == list[list_pos].osd_num)
{
break;
}
}
if (i == pg->cur_set.size())
{
n_mismatched++;
}
}
else
{
if (pg->cur_set[replica] != list[list_pos].osd_num)
{
n_mismatched++;
@ -162,7 +134,6 @@ void pg_obj_state_check_t::handle_version()
}
}
}
}
if (!list[list_pos].is_stable)
{
n_unstable++;
@ -171,7 +142,7 @@ void pg_obj_state_check_t::handle_version()
void pg_obj_state_check_t::finish_object()
{
if (!target_ver && (n_stable > 0 || n_roles >= pg->pg_data_size))
if (!target_ver && (n_stable > 0 || n_roles >= pg->pg_minsize))
{
// Version is either stable or recoverable
target_ver = last_ver;
@ -180,14 +151,11 @@ void pg_obj_state_check_t::finish_object()
obj_end = list_pos;
// Remember the decision
uint64_t state = 0;
if (n_invalid > 0)
if (n_buggy > 0)
{
// It's not allowed to change the replication scheme for a pool other than by recreating it
// So we must bring the PG offline
state = OBJ_INCOMPLETE;
pg->state |= PG_HAS_INVALID;
pg->total_count++;
return;
state = OBJ_BUGGY;
// FIXME: bring pg offline
throw std::runtime_error("buggy object state");
}
if (n_unstable > 0)
{
@ -233,42 +201,51 @@ void pg_obj_state_check_t::finish_object()
{
return;
}
if (!replicated && n_roles < pg->pg_data_size)
if (n_roles < pg->pg_minsize)
{
if (log_level > 1)
{
printf("Object is incomplete: %lx:%lx version=%lu/%lu\n", oid.inode, oid.stripe, target_ver, max_ver);
printf("Object is incomplete: inode=%lu stripe=%lu version=%lu/%lu\n", oid.inode, oid.stripe, target_ver, max_ver);
for (int i = ver_start; i < ver_end; i++)
{
printf("Present on: osd %lu, role %ld%s\n", list[i].osd_num, (list[i].oid.stripe & STRIPE_MASK), list[i].is_stable ? " (stable)" : "");
}
}
if (log_level > 2)
{
for (int i = obj_start; i < obj_end; i++)
{
printf("v%lu present on: osd %lu, role %ld%s\n", list[i].version, list[i].osd_num, (list[i].oid.stripe & STRIPE_MASK), list[i].is_stable ? " (stable)" : "");
}
}
state = OBJ_INCOMPLETE;
pg->state = pg->state | PG_HAS_INCOMPLETE;
}
else if ((replicated ? n_copies : n_roles) < pg->pg_cursize)
else if (n_roles < pg->pg_cursize)
{
if (log_level > 1)
{
printf("Object is degraded: %lx:%lx version=%lu/%lu\n", oid.inode, oid.stripe, target_ver, max_ver);
printf("Object is degraded: inode=%lu stripe=%lu version=%lu/%lu\n", oid.inode, oid.stripe, target_ver, max_ver);
for (int i = ver_start; i < ver_end; i++)
{
printf("Present on: osd %lu, role %ld%s\n", list[i].osd_num, (list[i].oid.stripe & STRIPE_MASK), list[i].is_stable ? " (stable)" : "");
}
}
if (log_level > 2)
{
for (int i = obj_start; i < obj_end; i++)
{
printf("v%lu present on: osd %lu, role %ld%s\n", list[i].version, list[i].osd_num, (list[i].oid.stripe & STRIPE_MASK), list[i].is_stable ? " (stable)" : "");
}
}
state = OBJ_DEGRADED;
pg->state = pg->state | PG_HAS_DEGRADED;
}
else if (n_mismatched > 0)
if (n_mismatched > 0)
{
if (log_level > 2 && (replicated || n_roles >= pg->pg_cursize))
{
printf("Object is misplaced: %lx:%lx version=%lu/%lu\n", oid.inode, oid.stripe, target_ver, max_ver);
}
state |= OBJ_MISPLACED;
pg->state = pg->state | PG_HAS_MISPLACED;
}
if (log_level > 1 && (state & (OBJ_INCOMPLETE | OBJ_DEGRADED)) ||
log_level > 2 && (state & OBJ_MISPLACED))
{
for (int i = obj_start; i < obj_end; i++)
{
printf("v%lu present on: osd %lu, role %ld%s\n", list[i].version, list[i].osd_num,
(list[i].oid.stripe & STRIPE_MASK), list[i].is_stable ? " (stable)" : "");
}
}
pg->total_count++;
if (state != 0 || ver_end < obj_end)
{
@ -302,14 +279,11 @@ void pg_obj_state_check_t::finish_object()
.osd_num = list[i].osd_num,
.outdated = true,
});
if (!(state & (OBJ_INCOMPLETE | OBJ_DEGRADED)))
{
state |= OBJ_MISPLACED;
pg->state = pg->state | PG_HAS_MISPLACED;
}
}
}
}
if (target_ver < max_ver)
{
pg->ver_override[oid] = target_ver;
@ -324,23 +298,6 @@ void pg_obj_state_check_t::finish_object()
if (it == pg->state_dict.end())
{
std::vector<uint64_t> read_target;
if (replicated)
{
for (auto & o: osd_set)
{
if (!o.outdated)
{
read_target.push_back(o.osd_num);
}
}
while (read_target.size() < pg->pg_size)
{
// FIXME: This is because we then use .data() and assume it's at least <pg_size> long
read_target.push_back(0);
}
}
else
{
read_target.resize(pg->pg_size);
for (int i = 0; i < pg->pg_size; i++)
{
@ -353,7 +310,6 @@ void pg_obj_state_check_t::finish_object()
read_target[o.role] = o.osd_num;
}
}
}
pg->state_dict[osd_set] = {
.read_target = read_target,
.osd_set = osd_set,
@ -388,9 +344,7 @@ void pg_t::calc_object_states(int log_level)
pg_obj_state_check_t st;
st.log_level = log_level;
st.pg = this;
st.replicated = (this->scheme == POOL_SCHEME_REPLICATED);
auto ps = peering_state;
epoch = 0;
for (auto it: ps->list_results)
{
auto nstab = it.second.stable_count;
@ -401,10 +355,6 @@ void pg_t::calc_object_states(int log_level)
obj_ver_id *ov = it.second.buf;
for (uint64_t i = 0; i < n; i++, ov++)
{
if ((ov->version >> (64-PG_EPOCH_BITS)) > epoch)
{
epoch = (ov->version >> (64-PG_EPOCH_BITS));
}
st.list[start+i] = {
.oid = ov->oid,
.version = ov->version,
@ -420,17 +370,12 @@ void pg_t::calc_object_states(int log_level)
std::sort(st.list.begin(), st.list.end());
// Walk over it and check object states
st.walk();
if (this->state & (PG_DEGRADED|PG_LEFT_ON_DEAD))
{
assert(epoch != ((1ul << PG_EPOCH_BITS)-1));
epoch++;
}
}
void pg_t::print_state()
{
printf(
"[PG %u/%u] is %s%s%s%s%s%s%s%s%s%s%s%s%s (%lu objects)\n", pool_id, pg_num,
"[PG %u] is %s%s%s%s%s%s%s%s%s%s%s (%lu objects)\n", pg_num,
(state & PG_STARTING) ? "starting" : "",
(state & PG_OFFLINE) ? "offline" : "",
(state & PG_PEERING) ? "peering" : "",
@ -442,8 +387,6 @@ void pg_t::print_state()
(state & PG_HAS_DEGRADED) ? " + has_degraded" : "",
(state & PG_HAS_MISPLACED) ? " + has_misplaced" : "",
(state & PG_HAS_UNCLEAN) ? " + has_unclean" : "",
(state & PG_HAS_INVALID) ? " + has_invalid" : "",
(state & PG_LEFT_ON_DEAD) ? " + left_on_dead" : "",
total_count
);
}

View File

@ -1,7 +1,5 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include <map>
#include <unordered_map>
#include <vector>
#include <algorithm>
@ -11,8 +9,6 @@
#include "osd_ops.h"
#include "pg_states.h"
#define PG_EPOCH_BITS 48
struct pg_obj_loc_t
{
uint64_t role;
@ -44,9 +40,8 @@ struct osd_op_t;
struct pg_peering_state_t
{
// osd_num -> list result
std::map<osd_num_t, osd_op_t*> list_ops;
std::map<osd_num_t, pg_list_result_t> list_results;
pool_id_t pool_id = 0;
std::unordered_map<osd_num_t, osd_op_t*> list_ops;
std::unordered_map<osd_num_t, pg_list_result_t> list_results;
pg_num_t pg_num = 0;
};
@ -56,13 +51,6 @@ struct obj_piece_id_t
uint64_t osd_num;
};
struct obj_ver_osd_t
{
uint64_t osd_num;
object_id oid;
uint64_t version;
};
struct flush_action_t
{
bool rollback = false, make_stable = false;
@ -81,13 +69,9 @@ struct pg_flush_batch_t
struct pg_t
{
int state = 0;
uint64_t scheme = 0;
uint64_t pg_cursize = 0, pg_size = 0, pg_minsize = 0, pg_data_size = 0;
pool_id_t pool_id = 0;
pg_num_t pg_num = 0;
uint64_t pg_cursize = 3, pg_size = 3, pg_minsize = 2;
pg_num_t pg_num;
uint64_t clean_count = 0, total_count = 0;
// epoch number - should increase with each non-clean activation of the PG
uint64_t epoch = 0, reported_epoch = 0;
// target history and all potential peers
std::vector<std::vector<osd_num_t>> target_history;
std::vector<osd_num_t> all_peers;
@ -101,14 +85,13 @@ struct pg_t
std::vector<osd_num_t> cur_set;
// same thing in state_dict-like format
pg_osd_set_t cur_loc_set;
// moved object map. by default, each object is considered to reside on cur_set.
// moved object map. by default, each object is considered to reside on the cur_set.
// this map stores all objects that differ.
// it may consume up to ~ (raw storage / object size) * 24 bytes in the worst case scenario
// which is up to ~192 MB per 1 TB in the worst case scenario
std::map<pg_osd_set_t, pg_osd_set_state_t> state_dict;
btree::btree_map<object_id, pg_osd_set_state_t*> incomplete_objects, misplaced_objects, degraded_objects;
std::map<obj_piece_id_t, flush_action_t> flush_actions;
std::vector<obj_ver_osd_t> copies_to_delete_after_sync;
btree::btree_map<object_id, uint64_t> ver_override;
pg_peering_state_t *peering_state = NULL;
pg_flush_batch_t *flush_batch = NULL;

View File

@ -1,9 +1,5 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#define _LARGEFILE64_SOURCE
#include "malloc_or_die.h"
#include "osd_peering_pg.h"
#define STRIPE_SHIFT 12
@ -32,7 +28,7 @@ int main(int argc, char *argv[])
for (uint64_t osd_num = 1; osd_num <= 3; osd_num++)
{
pg_list_result_t r = {
.buf = (obj_ver_id*)malloc_or_die(sizeof(obj_ver_id) * 1024*1024*8),
.buf = (obj_ver_id*)malloc(sizeof(obj_ver_id) * 1024*1024*8),
.total_count = 1024*1024*8,
.stable_count = (uint64_t)(1024*1024*8 - (osd_num == 1 ? 10 : 0)),
};

671
osd_primary.cpp Normal file
View File

@ -0,0 +1,671 @@
#include "osd_primary.h"
// read: read directly or read paired stripe(s), reconstruct, return
// write: read paired stripe(s), reconstruct, modify, calculate parity, write
//
// nuance: take care to read the same version from paired stripes!
// to do so, we remember "last readable" version until a write request completes
// and we postpone other write requests to the same stripe until completion of previous ones
//
// sync: sync peers, get unstable versions, stabilize them
bool osd_t::prepare_primary_rw(osd_op_t *cur_op)
{
// PG number is calculated from the offset
// Our EC scheme stores data in fixed chunks equal to (K*block size)
// But we must not use K in the process of calculating the PG number
// So we calculate the PG number using a separate setting which should be per-inode (FIXME)
pg_num_t pg_num = (cur_op->req.rw.inode + cur_op->req.rw.offset / pg_stripe_size) % pg_count + 1;
auto pg_it = pgs.find(pg_num);
if (pg_it == pgs.end() || !(pg_it->second.state & PG_ACTIVE))
{
// This OSD is not primary for this PG or the PG is inactive
finish_op(cur_op, -EPIPE);
return false;
}
uint64_t pg_block_size = bs_block_size * pg_it->second.pg_minsize;
object_id oid = {
.inode = cur_op->req.rw.inode,
// oid.stripe = starting offset of the parity stripe, so it can be mapped back to the PG
.stripe = (cur_op->req.rw.offset / pg_stripe_size) * pg_stripe_size +
((cur_op->req.rw.offset % pg_stripe_size) / pg_block_size) * pg_block_size
};
if ((cur_op->req.rw.offset + cur_op->req.rw.len) > (oid.stripe + pg_block_size) ||
(cur_op->req.rw.offset % bs_disk_alignment) != 0 ||
(cur_op->req.rw.len % bs_disk_alignment) != 0)
{
finish_op(cur_op, -EINVAL);
return false;
}
osd_primary_op_data_t *op_data = (osd_primary_op_data_t*)calloc(
sizeof(osd_primary_op_data_t) + sizeof(osd_rmw_stripe_t) * pg_it->second.pg_size, 1
);
op_data->pg_num = pg_num;
op_data->oid = oid;
op_data->stripes = ((osd_rmw_stripe_t*)(op_data+1));
cur_op->op_data = op_data;
split_stripes(pg_it->second.pg_minsize, bs_block_size, (uint32_t)(cur_op->req.rw.offset - oid.stripe), cur_op->req.rw.len, op_data->stripes);
pg_it->second.inflight++;
return true;
}
static uint64_t* get_object_osd_set(pg_t &pg, object_id &oid, uint64_t *def, pg_osd_set_state_t **object_state)
{
if (!(pg.state & (PG_HAS_INCOMPLETE | PG_HAS_DEGRADED | PG_HAS_MISPLACED)))
{
*object_state = NULL;
return def;
}
auto st_it = pg.incomplete_objects.find(oid);
if (st_it != pg.incomplete_objects.end())
{
*object_state = st_it->second;
return st_it->second->read_target.data();
}
st_it = pg.degraded_objects.find(oid);
if (st_it != pg.degraded_objects.end())
{
*object_state = st_it->second;
return st_it->second->read_target.data();
}
st_it = pg.misplaced_objects.find(oid);
if (st_it != pg.misplaced_objects.end())
{
*object_state = st_it->second;
return st_it->second->read_target.data();
}
*object_state = NULL;
return def;
}
void osd_t::continue_primary_read(osd_op_t *cur_op)
{
if (!cur_op->op_data && !prepare_primary_rw(cur_op))
{
return;
}
osd_primary_op_data_t *op_data = cur_op->op_data;
if (op_data->st == 1) goto resume_1;
else if (op_data->st == 2) goto resume_2;
{
auto & pg = pgs[op_data->pg_num];
for (int role = 0; role < pg.pg_minsize; role++)
{
op_data->stripes[role].read_start = op_data->stripes[role].req_start;
op_data->stripes[role].read_end = op_data->stripes[role].req_end;
}
// Determine version
auto vo_it = pg.ver_override.find(op_data->oid);
op_data->target_ver = vo_it != pg.ver_override.end() ? vo_it->second : UINT64_MAX;
if (pg.state == PG_ACTIVE)
{
// Fast happy-path
cur_op->buf = alloc_read_buffer(op_data->stripes, pg.pg_minsize, 0);
submit_primary_subops(SUBMIT_READ, pg.pg_minsize, pg.cur_set.data(), cur_op);
cur_op->send_list.push_back(cur_op->buf, cur_op->req.rw.len);
op_data->st = 1;
}
else
{
// PG may be degraded or have misplaced objects
uint64_t* cur_set = get_object_osd_set(pg, op_data->oid, pg.cur_set.data(), &op_data->object_state);
if (extend_missing_stripes(op_data->stripes, cur_set, pg.pg_minsize, pg.pg_size) < 0)
{
finish_op(cur_op, -EIO);
return;
}
// Submit reads
op_data->pg_minsize = pg.pg_minsize;
op_data->pg_size = pg.pg_size;
op_data->degraded = 1;
cur_op->buf = alloc_read_buffer(op_data->stripes, pg.pg_size, 0);
submit_primary_subops(SUBMIT_READ, pg.pg_size, cur_set, cur_op);
op_data->st = 1;
}
}
resume_1:
return;
resume_2:
if (op_data->errors > 0)
{
finish_op(cur_op, op_data->epipe > 0 ? -EPIPE : -EIO);
return;
}
if (op_data->degraded)
{
// Reconstruct missing stripes
// FIXME: Always EC(k+1) by now. Add different coding schemes
osd_rmw_stripe_t *stripes = op_data->stripes;
for (int role = 0; role < op_data->pg_minsize; role++)
{
if (stripes[role].read_end != 0 && stripes[role].missing)
{
reconstruct_stripe(stripes, op_data->pg_size, role);
}
if (stripes[role].req_end != 0)
{
// Send buffer in parts to avoid copying
cur_op->send_list.push_back(
stripes[role].read_buf + (stripes[role].req_start - stripes[role].read_start),
stripes[role].req_end - stripes[role].req_start
);
}
}
}
finish_op(cur_op, cur_op->req.rw.len);
}
bool osd_t::check_write_queue(osd_op_t *cur_op, pg_t & pg)
{
osd_primary_op_data_t *op_data = cur_op->op_data;
// Check if actions are pending for this object
auto act_it = pg.flush_actions.lower_bound((obj_piece_id_t){
.oid = op_data->oid,
.osd_num = 0,
});
if (act_it != pg.flush_actions.end() &&
act_it->first.oid.inode == op_data->oid.inode &&
(act_it->first.oid.stripe & ~STRIPE_MASK) == op_data->oid.stripe)
{
pg.write_queue.emplace(op_data->oid, cur_op);
return false;
}
// Check if there are other write requests to the same object
auto vo_it = pg.write_queue.find(op_data->oid);
if (vo_it != pg.write_queue.end())
{
op_data->st = 1;
pg.write_queue.emplace(op_data->oid, cur_op);
return false;
}
pg.write_queue.emplace(op_data->oid, cur_op);
return true;
}
void osd_t::continue_primary_write(osd_op_t *cur_op)
{
if (!cur_op->op_data && !prepare_primary_rw(cur_op))
{
return;
}
osd_primary_op_data_t *op_data = cur_op->op_data;
auto & pg = pgs[op_data->pg_num];
if (op_data->st == 1) goto resume_1;
else if (op_data->st == 2) goto resume_2;
else if (op_data->st == 3) goto resume_3;
else if (op_data->st == 4) goto resume_4;
else if (op_data->st == 5) goto resume_5;
else if (op_data->st == 6) goto resume_6;
else if (op_data->st == 7) goto resume_7;
else if (op_data->st == 8) goto resume_8;
assert(op_data->st == 0);
printf("primary_write\n");
if (!check_write_queue(cur_op, pg))
{
return;
}
resume_1:
// Determine blocks to read and write
// Missing chunks are allowed to be overwritten even in incomplete objects
// FIXME: Allow to do small writes to the old (degraded/misplaced) OSD set for the lower performance impact
op_data->prev_set = get_object_osd_set(pg, op_data->oid, pg.cur_set.data(), &op_data->object_state);
cur_op->rmw_buf = calc_rmw(cur_op->buf, op_data->stripes, op_data->prev_set,
pg.pg_size, pg.pg_minsize, pg.pg_cursize, pg.cur_set.data(), bs_block_size);
// Read required blocks
submit_primary_subops(SUBMIT_RMW_READ, pg.pg_size, op_data->prev_set, cur_op);
resume_2:
op_data->st = 2;
return;
resume_3:
if (op_data->errors > 0)
{
pg_cancel_write_queue(pg, op_data->oid, op_data->epipe > 0 ? -EPIPE : -EIO);
return;
}
// Save version override for parallel reads
pg.ver_override[op_data->oid] = op_data->fact_ver;
// Recover missing stripes, calculate parity
calc_rmw_parity(op_data->stripes, pg.pg_size, op_data->prev_set, pg.cur_set.data(), bs_block_size);
// Send writes
submit_primary_subops(SUBMIT_WRITE, pg.pg_size, pg.cur_set.data(), cur_op);
resume_4:
op_data->st = 4;
return;
resume_5:
if (op_data->errors > 0)
{
pg_cancel_write_queue(pg, op_data->oid, op_data->epipe > 0 ? -EPIPE : -EIO);
return;
}
if (op_data->fact_ver == 1)
{
// Object is created
pg.clean_count++;
pg.total_count++;
}
if (op_data->object_state)
{
{
int recovery_type = op_data->object_state->state & (OBJ_DEGRADED|OBJ_INCOMPLETE) ? 0 : 1;
recovery_stat_count[0][recovery_type]++;
if (!recovery_stat_count[0][recovery_type])
{
recovery_stat_count[0][recovery_type]++;
recovery_stat_bytes[0][recovery_type] = 0;
}
for (int role = 0; role < pg.pg_size; role++)
{
recovery_stat_bytes[0][recovery_type] += op_data->stripes[role].write_end - op_data->stripes[role].write_start;
}
}
if (op_data->object_state->state & OBJ_MISPLACED)
{
// Remove extra chunks
submit_primary_del_subops(cur_op, pg.cur_set.data(), op_data->object_state->osd_set);
if (op_data->n_subops > 0)
{
op_data->st = 8;
return;
resume_8:
if (op_data->errors > 0)
{
pg_cancel_write_queue(pg, op_data->oid, op_data->epipe > 0 ? -EPIPE : -EIO);
return;
}
}
}
// Clear object state
remove_object_from_state(op_data->oid, op_data->object_state, pg);
pg.clean_count++;
}
// Remove version override
pg.ver_override.erase(op_data->oid);
// FIXME: Check for immediate_commit == IMMEDIATE_SMALL
resume_6:
resume_7:
if (!finalize_primary_write(cur_op, pg, pg.cur_loc_set, 6))
{
return;
}
object_id oid = op_data->oid;
finish_op(cur_op, cur_op->req.rw.len);
// Continue other write operations to the same object
auto next_it = pg.write_queue.find(oid);
auto this_it = next_it;
next_it++;
pg.write_queue.erase(this_it);
if (next_it != pg.write_queue.end() &&
next_it->first == oid)
{
osd_op_t *next_op = next_it->second;
continue_primary_write(next_op);
}
}
bool osd_t::finalize_primary_write(osd_op_t *cur_op, pg_t & pg, pg_osd_set_t & loc_set, int base_state)
{
osd_primary_op_data_t *op_data = cur_op->op_data;
if (op_data->st == base_state)
{
goto resume_6;
}
else if (op_data->st == base_state+1)
{
goto resume_7;
}
if (immediate_commit == IMMEDIATE_ALL)
{
op_data->unstable_write_osds = new std::vector<unstable_osd_num_t>();
op_data->unstable_writes = new obj_ver_id[loc_set.size()];
{
int last_start = 0;
for (auto & chunk: loc_set)
{
op_data->unstable_writes[last_start] = (obj_ver_id){
.oid = {
.inode = op_data->oid.inode,
.stripe = op_data->oid.stripe | chunk.role,
},
.version = op_data->fact_ver,
};
op_data->unstable_write_osds->push_back((unstable_osd_num_t){
.osd_num = chunk.osd_num,
.start = last_start,
.len = 1,
});
last_start++;
}
}
submit_primary_stab_subops(cur_op);
resume_6:
op_data->st = 6;
return false;
resume_7:
// FIXME: Free those in the destructor?
delete op_data->unstable_write_osds;
delete[] op_data->unstable_writes;
op_data->unstable_writes = NULL;
op_data->unstable_write_osds = NULL;
if (op_data->errors > 0)
{
pg_cancel_write_queue(pg, op_data->oid, op_data->epipe > 0 ? -EPIPE : -EIO);
return false;
}
}
else
{
// Remember version as unstable
for (auto & chunk: loc_set)
{
this->unstable_writes[(osd_object_id_t){
.osd_num = chunk.osd_num,
.oid = {
.inode = op_data->oid.inode,
.stripe = op_data->oid.stripe | chunk.role,
},
}] = op_data->fact_ver;
}
// Remember PG as dirty to drop the connection when PG goes offline
// (this is required because of the "lazy sync")
c_cli.clients[cur_op->peer_fd].dirty_pgs.insert(op_data->pg_num);
dirty_pgs.insert(op_data->pg_num);
}
return true;
}
// Save and clear unstable_writes -> SYNC all -> STABLE all
void osd_t::continue_primary_sync(osd_op_t *cur_op)
{
if (!cur_op->op_data)
{
cur_op->op_data = (osd_primary_op_data_t*)calloc(sizeof(osd_primary_op_data_t), 1);
}
osd_primary_op_data_t *op_data = cur_op->op_data;
if (op_data->st == 1) goto resume_1;
else if (op_data->st == 2) goto resume_2;
else if (op_data->st == 3) goto resume_3;
else if (op_data->st == 4) goto resume_4;
else if (op_data->st == 5) goto resume_5;
else if (op_data->st == 6) goto resume_6;
assert(op_data->st == 0);
printf("primary_sync\n");
if (syncs_in_progress.size() > 0)
{
// Wait for previous syncs, if any
// FIXME: We may try to execute the current one in parallel, like in Blockstore, but I'm not sure if it matters at all
syncs_in_progress.push_back(cur_op);
op_data->st = 1;
resume_1:
return;
}
else
{
syncs_in_progress.push_back(cur_op);
}
resume_2:
if (unstable_writes.size() == 0)
{
// Nothing to sync
goto finish;
}
// Save and clear unstable_writes
// In theory it is possible to do in on a per-client basis, but this seems to be an unnecessary complication
// It would be cool not to copy these here at all, but someone has to deduplicate them by object IDs anyway
{
op_data->unstable_write_osds = new std::vector<unstable_osd_num_t>();
op_data->unstable_writes = new obj_ver_id[this->unstable_writes.size()];
op_data->dirty_pgs = new pg_num_t[dirty_pgs.size()];
op_data->dirty_pg_count = dirty_pgs.size();
osd_num_t last_osd = 0;
int last_start = 0, last_end = 0;
for (auto it = this->unstable_writes.begin(); it != this->unstable_writes.end(); it++)
{
if (last_osd != it->first.osd_num)
{
if (last_osd != 0)
{
op_data->unstable_write_osds->push_back((unstable_osd_num_t){
.osd_num = last_osd,
.start = last_start,
.len = last_end - last_start,
});
}
last_osd = it->first.osd_num;
last_start = last_end;
}
op_data->unstable_writes[last_end] = (obj_ver_id){
.oid = it->first.oid,
.version = it->second,
};
last_end++;
}
if (last_osd != 0)
{
op_data->unstable_write_osds->push_back((unstable_osd_num_t){
.osd_num = last_osd,
.start = last_start,
.len = last_end - last_start,
});
}
int dpg = 0;
for (auto dirty_pg_num: dirty_pgs)
{
pgs[dirty_pg_num].inflight++;
op_data->dirty_pgs[dpg++] = dirty_pg_num;
}
dirty_pgs.clear();
this->unstable_writes.clear();
}
if (immediate_commit != IMMEDIATE_ALL)
{
// SYNC
submit_primary_sync_subops(cur_op);
resume_3:
op_data->st = 3;
return;
resume_4:
if (op_data->errors > 0)
{
goto resume_6;
}
}
// Stabilize version sets
submit_primary_stab_subops(cur_op);
resume_5:
op_data->st = 5;
return;
resume_6:
if (op_data->errors > 0)
{
// Return objects back into the unstable write set
for (auto unstable_osd: *(op_data->unstable_write_osds))
{
for (int i = 0; i < unstable_osd.len; i++)
{
// Except those from peered PGs
auto & w = op_data->unstable_writes[i];
pg_num_t wpg = map_to_pg(w.oid);
if (pgs[wpg].state & PG_ACTIVE)
{
uint64_t & dest = this->unstable_writes[(osd_object_id_t){
.osd_num = unstable_osd.osd_num,
.oid = w.oid,
}];
dest = dest < w.version ? w.version : dest;
dirty_pgs.insert(wpg);
}
}
}
}
for (int i = 0; i < op_data->dirty_pg_count; i++)
{
auto & pg = pgs.at(op_data->dirty_pgs[i]);
pg.inflight--;
if ((pg.state & PG_STOPPING) && pg.inflight == 0 && !pg.flush_batch)
{
finish_stop_pg(pg);
}
}
// FIXME: Free those in the destructor?
delete op_data->dirty_pgs;
delete op_data->unstable_write_osds;
delete[] op_data->unstable_writes;
op_data->unstable_writes = NULL;
op_data->unstable_write_osds = NULL;
if (op_data->errors > 0)
{
finish_op(cur_op, op_data->epipe > 0 ? -EPIPE : -EIO);
}
else
{
finish:
if (cur_op->peer_fd)
{
auto it = c_cli.clients.find(cur_op->peer_fd);
if (it != c_cli.clients.end())
it->second.dirty_pgs.clear();
}
finish_op(cur_op, 0);
}
assert(syncs_in_progress.front() == cur_op);
syncs_in_progress.pop_front();
if (syncs_in_progress.size() > 0)
{
cur_op = syncs_in_progress.front();
op_data = cur_op->op_data;
op_data->st++;
goto resume_2;
}
}
// Decrement pg_osd_set_state_t's object_count and change PG state accordingly
void osd_t::remove_object_from_state(object_id & oid, pg_osd_set_state_t *object_state, pg_t & pg)
{
if (object_state->state & OBJ_INCOMPLETE)
{
// Successful write means that object is not incomplete anymore
this->incomplete_objects--;
pg.incomplete_objects.erase(oid);
if (!pg.incomplete_objects.size())
{
pg.state = pg.state & ~PG_HAS_INCOMPLETE;
report_pg_state(pg);
}
}
else if (object_state->state & OBJ_DEGRADED)
{
this->degraded_objects--;
pg.degraded_objects.erase(oid);
if (!pg.degraded_objects.size())
{
pg.state = pg.state & ~PG_HAS_DEGRADED;
report_pg_state(pg);
}
}
else if (object_state->state & OBJ_MISPLACED)
{
this->misplaced_objects--;
pg.misplaced_objects.erase(oid);
if (!pg.misplaced_objects.size())
{
pg.state = pg.state & ~PG_HAS_MISPLACED;
report_pg_state(pg);
}
}
else
{
throw std::runtime_error("BUG: Invalid object state: "+std::to_string(object_state->state));
}
object_state->object_count--;
if (!object_state->object_count)
{
pg.state_dict.erase(object_state->osd_set);
}
}
void osd_t::continue_primary_del(osd_op_t *cur_op)
{
if (!cur_op->op_data && !prepare_primary_rw(cur_op))
{
return;
}
osd_primary_op_data_t *op_data = cur_op->op_data;
auto & pg = pgs[op_data->pg_num];
if (op_data->st == 1) goto resume_1;
else if (op_data->st == 2) goto resume_2;
else if (op_data->st == 3) goto resume_3;
else if (op_data->st == 4) goto resume_4;
else if (op_data->st == 5) goto resume_5;
else if (op_data->st == 6) goto resume_6;
else if (op_data->st == 7) goto resume_7;
assert(op_data->st == 0);
// Delete is forbidden even in active PGs if they're also degraded or have previous dead OSDs
if (pg.state & (PG_DEGRADED | PG_LEFT_ON_DEAD))
{
finish_op(cur_op, -EBUSY);
return;
}
if (!check_write_queue(cur_op, pg))
{
return;
}
resume_1:
// Determine which OSDs contain this object and delete it
op_data->prev_set = get_object_osd_set(pg, op_data->oid, pg.cur_set.data(), &op_data->object_state);
// Submit 1 read to determine the actual version number
submit_primary_subops(SUBMIT_RMW_READ, pg.pg_size, op_data->prev_set, cur_op);
resume_2:
op_data->st = 2;
return;
resume_3:
if (op_data->errors > 0)
{
pg_cancel_write_queue(pg, op_data->oid, op_data->epipe > 0 ? -EPIPE : -EIO);
return;
}
// Save version override for parallel reads
pg.ver_override[op_data->oid] = op_data->fact_ver;
// Submit deletes
op_data->fact_ver++;
submit_primary_del_subops(cur_op, NULL, op_data->object_state ? op_data->object_state->osd_set : pg.cur_loc_set);
resume_4:
op_data->st = 4;
return;
resume_5:
if (op_data->errors > 0)
{
pg_cancel_write_queue(pg, op_data->oid, op_data->epipe > 0 ? -EPIPE : -EIO);
return;
}
// Remove version override
pg.ver_override.erase(op_data->oid);
resume_6:
resume_7:
if (!finalize_primary_write(cur_op, pg, op_data->object_state ? op_data->object_state->osd_set : pg.cur_loc_set, 6))
{
return;
}
// Adjust PG stats after "instant stabilize", because we need object_state above
if (!op_data->object_state)
{
pg.clean_count--;
}
else
{
remove_object_from_state(op_data->oid, op_data->object_state, pg);
}
pg.total_count--;
object_id oid = op_data->oid;
finish_op(cur_op, cur_op->req.rw.len);
// Continue other write operations to the same object
auto next_it = pg.write_queue.find(oid);
auto this_it = next_it;
next_it++;
pg.write_queue.erase(this_it);
if (next_it != pg.write_queue.end() &&
next_it->first == oid)
{
osd_op_t *next_op = next_it->second;
continue_primary_write(next_op);
}
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#pragma once
#include "osd.h"
@ -23,9 +20,8 @@ struct osd_primary_op_data_t
object_id oid;
uint64_t target_ver;
uint64_t fact_ver = 0;
uint64_t scheme = 0;
int n_subops = 0, done = 0, errors = 0, epipe = 0;
int degraded = 0, pg_size, pg_data_size;
int degraded = 0, pg_size, pg_minsize;
osd_rmw_stripe_t *stripes;
osd_op_t *subops = NULL;
uint64_t *prev_set = NULL;
@ -33,13 +29,7 @@ struct osd_primary_op_data_t
// for sync. oops, requires freeing
std::vector<unstable_osd_num_t> *unstable_write_osds = NULL;
pool_pg_num_t *dirty_pgs = NULL;
pg_num_t *dirty_pgs = NULL;
int dirty_pg_count = 0;
osd_num_t *dirty_osds = NULL;
int dirty_osd_count = 0;
obj_ver_id *unstable_writes = NULL;
obj_ver_osd_t *copies_to_delete = NULL;
int copies_to_delete_count = 0;
};
bool contains_osd(osd_num_t *osd_set, uint64_t size, osd_num_t osd_num);

489
osd_primary_subops.cpp Normal file
View File

@ -0,0 +1,489 @@
#include "osd_primary.h"
void osd_t::autosync()
{
// FIXME Autosync based on the number of unstable writes to prevent
// "journal_sector_buffer_count is too low for this batch" errors
if (immediate_commit != IMMEDIATE_ALL && !autosync_op)
{
autosync_op = new osd_op_t();
autosync_op->op_type = OSD_OP_IN;
autosync_op->req = {
.sync = {
.header = {
.magic = SECONDARY_OSD_OP_MAGIC,
.id = 1,
.opcode = OSD_OP_SYNC,
},
},
};
autosync_op->callback = [this](osd_op_t *op)
{
if (op->reply.hdr.retval < 0)
{
printf("Warning: automatic sync resulted in an error: %ld (%s)\n", -op->reply.hdr.retval, strerror(-op->reply.hdr.retval));
}
delete autosync_op;
autosync_op = NULL;
};
exec_op(autosync_op);
}
}
void osd_t::finish_op(osd_op_t *cur_op, int retval)
{
inflight_ops--;
if (cur_op->op_data && cur_op->op_data->pg_num > 0)
{
auto & pg = pgs[cur_op->op_data->pg_num];
pg.inflight--;
assert(pg.inflight >= 0);
if ((pg.state & PG_STOPPING) && pg.inflight == 0 && !pg.flush_batch)
{
finish_stop_pg(pg);
}
}
if (!cur_op->peer_fd)
{
// Copy lambda to be unaffected by `delete op`
std::function<void(osd_op_t*)>(cur_op->callback)(cur_op);
}
else
{
// FIXME add separate magic number
auto cl_it = c_cli.clients.find(cur_op->peer_fd);
if (cl_it != c_cli.clients.end())
{
cur_op->reply.hdr.magic = SECONDARY_OSD_REPLY_MAGIC;
cur_op->reply.hdr.id = cur_op->req.hdr.id;
cur_op->reply.hdr.opcode = cur_op->req.hdr.opcode;
cur_op->reply.hdr.retval = retval;
c_cli.outbox_push(cur_op);
}
else
{
delete cur_op;
}
}
}
void osd_t::submit_primary_subops(int submit_type, int pg_size, const uint64_t* osd_set, osd_op_t *cur_op)
{
bool w = submit_type == SUBMIT_WRITE;
osd_primary_op_data_t *op_data = cur_op->op_data;
osd_rmw_stripe_t *stripes = op_data->stripes;
// Allocate subops
int n_subops = 0, zero_read = -1;
for (int role = 0; role < pg_size; role++)
{
if (osd_set[role] == this->osd_num || osd_set[role] != 0 && zero_read == -1)
{
zero_read = role;
}
if (osd_set[role] != 0 && (w || stripes[role].read_end != 0))
{
n_subops++;
}
}
if (!n_subops && submit_type == SUBMIT_RMW_READ)
{
n_subops = 1;
}
else
{
zero_read = -1;
}
uint64_t op_version = w ? op_data->fact_ver+1 : (submit_type == SUBMIT_RMW_READ ? UINT64_MAX : op_data->target_ver);
osd_op_t *subops = new osd_op_t[n_subops];
op_data->fact_ver = 0;
op_data->done = op_data->errors = 0;
op_data->n_subops = n_subops;
op_data->subops = subops;
int i = 0;
for (int role = 0; role < pg_size; role++)
{
// We always submit zero-length writes to all replicas, even if the stripe is not modified
if (!(w || stripes[role].read_end != 0 || zero_read == role))
{
continue;
}
osd_num_t role_osd_num = osd_set[role];
if (role_osd_num != 0)
{
if (role_osd_num == this->osd_num)
{
clock_gettime(CLOCK_REALTIME, &subops[i].tv_begin);
subops[i].op_type = (uint64_t)cur_op;
subops[i].bs_op = new blockstore_op_t({
.opcode = (uint64_t)(w ? BS_OP_WRITE : BS_OP_READ),
.callback = [subop = &subops[i], this](blockstore_op_t *bs_subop)
{
handle_primary_bs_subop(subop);
},
.oid = {
.inode = op_data->oid.inode,
.stripe = op_data->oid.stripe | role,
},
.version = op_version,
.offset = w ? stripes[role].write_start : stripes[role].read_start,
.len = w ? stripes[role].write_end - stripes[role].write_start : stripes[role].read_end - stripes[role].read_start,
.buf = w ? stripes[role].write_buf : stripes[role].read_buf,
});
bs->enqueue_op(subops[i].bs_op);
}
else
{
subops[i].op_type = OSD_OP_OUT;
subops[i].send_list.push_back(subops[i].req.buf, OSD_PACKET_SIZE);
subops[i].peer_fd = c_cli.osd_peer_fds.at(role_osd_num);
subops[i].req.sec_rw = {
.header = {
.magic = SECONDARY_OSD_OP_MAGIC,
.id = c_cli.next_subop_id++,
.opcode = (uint64_t)(w ? OSD_OP_SECONDARY_WRITE : OSD_OP_SECONDARY_READ),
},
.oid = {
.inode = op_data->oid.inode,
.stripe = op_data->oid.stripe | role,
},
.version = op_version,
.offset = w ? stripes[role].write_start : stripes[role].read_start,
.len = w ? stripes[role].write_end - stripes[role].write_start : stripes[role].read_end - stripes[role].read_start,
};
subops[i].buf = w ? stripes[role].write_buf : stripes[role].read_buf;
if (w && stripes[role].write_end > 0)
{
subops[i].send_list.push_back(stripes[role].write_buf, stripes[role].write_end - stripes[role].write_start);
}
subops[i].callback = [cur_op, this](osd_op_t *subop)
{
int fail_fd = subop->req.hdr.opcode == OSD_OP_SECONDARY_WRITE &&
subop->reply.hdr.retval != subop->req.sec_rw.len ? subop->peer_fd : -1;
// so it doesn't get freed
subop->buf = NULL;
handle_primary_subop(
subop->req.hdr.opcode, cur_op, subop->reply.hdr.retval,
subop->req.sec_rw.len, subop->reply.sec_rw.version
);
if (fail_fd >= 0)
{
// write operation failed, drop the connection
c_cli.stop_client(fail_fd);
}
};
c_cli.outbox_push(&subops[i]);
}
i++;
}
}
}
static uint64_t bs_op_to_osd_op[] = {
0,
OSD_OP_SECONDARY_READ, // BS_OP_READ
OSD_OP_SECONDARY_WRITE, // BS_OP_WRITE
OSD_OP_SECONDARY_SYNC, // BS_OP_SYNC
OSD_OP_SECONDARY_STABILIZE, // BS_OP_STABLE
OSD_OP_SECONDARY_DELETE, // BS_OP_DELETE
OSD_OP_SECONDARY_LIST, // BS_OP_LIST
OSD_OP_SECONDARY_ROLLBACK, // BS_OP_ROLLBACK
OSD_OP_TEST_SYNC_STAB_ALL, // BS_OP_SYNC_STAB_ALL
};
void osd_t::handle_primary_bs_subop(osd_op_t *subop)
{
osd_op_t *cur_op = (osd_op_t*)subop->op_type;
blockstore_op_t *bs_op = subop->bs_op;
int expected = bs_op->opcode == BS_OP_READ || bs_op->opcode == BS_OP_WRITE ? bs_op->len : 0;
if (bs_op->retval != expected && bs_op->opcode != BS_OP_READ)
{
// die
throw std::runtime_error(
"local blockstore modification failed (opcode = "+std::to_string(bs_op->opcode)+
" retval = "+std::to_string(bs_op->retval)+")"
);
}
add_bs_subop_stats(subop);
uint64_t opcode = bs_op_to_osd_op[bs_op->opcode];
int retval = bs_op->retval;
uint64_t version = bs_op->version;
delete bs_op;
subop->bs_op = NULL;
handle_primary_subop(opcode, cur_op, retval, expected, version);
}
void osd_t::add_bs_subop_stats(osd_op_t *subop)
{
// Include local blockstore ops in statistics
uint64_t opcode = bs_op_to_osd_op[subop->bs_op->opcode];
timespec tv_end;
clock_gettime(CLOCK_REALTIME, &tv_end);
c_cli.stats.op_stat_count[opcode]++;
if (!c_cli.stats.op_stat_count[opcode])
{
c_cli.stats.op_stat_count[opcode] = 1;
c_cli.stats.op_stat_sum[opcode] = 0;
c_cli.stats.op_stat_bytes[opcode] = 0;
}
c_cli.stats.op_stat_sum[opcode] += (
(tv_end.tv_sec - subop->tv_begin.tv_sec)*1000000 +
(tv_end.tv_nsec - subop->tv_begin.tv_nsec)/1000
);
if (opcode == OSD_OP_SECONDARY_READ || opcode == OSD_OP_SECONDARY_WRITE)
{
c_cli.stats.op_stat_bytes[opcode] += subop->bs_op->len;
}
}
void osd_t::handle_primary_subop(uint64_t opcode, osd_op_t *cur_op, int retval, int expected, uint64_t version)
{
osd_primary_op_data_t *op_data = cur_op->op_data;
if (retval != expected)
{
printf("%s subop failed: retval = %d (expected %d)\n", osd_op_names[opcode], retval, expected);
if (retval == -EPIPE)
{
op_data->epipe++;
}
op_data->errors++;
}
else
{
op_data->done++;
if (opcode == OSD_OP_SECONDARY_READ || opcode == OSD_OP_SECONDARY_WRITE)
{
if (op_data->fact_ver != 0 && op_data->fact_ver != version)
{
throw std::runtime_error(
"different fact_versions returned from "+std::string(osd_op_names[opcode])+
" subops: "+std::to_string(version)+" vs "+std::to_string(op_data->fact_ver)
);
}
op_data->fact_ver = version;
}
}
if ((op_data->errors + op_data->done) >= op_data->n_subops)
{
delete[] op_data->subops;
op_data->subops = NULL;
op_data->st++;
if (cur_op->req.hdr.opcode == OSD_OP_READ)
{
continue_primary_read(cur_op);
}
else if (cur_op->req.hdr.opcode == OSD_OP_WRITE)
{
continue_primary_write(cur_op);
}
else if (cur_op->req.hdr.opcode == OSD_OP_SYNC)
{
continue_primary_sync(cur_op);
}
else if (cur_op->req.hdr.opcode == OSD_OP_DELETE)
{
continue_primary_del(cur_op);
}
else
{
throw std::runtime_error("BUG: unknown opcode");
}
}
}
void osd_t::submit_primary_del_subops(osd_op_t *cur_op, uint64_t *cur_set, pg_osd_set_t & loc_set)
{
osd_primary_op_data_t *op_data = cur_op->op_data;
int extra_chunks = 0;
for (auto & chunk: loc_set)
{
if (!cur_set || chunk.osd_num != cur_set[chunk.role])
{
extra_chunks++;
}
}
op_data->n_subops = extra_chunks;
op_data->done = op_data->errors = 0;
if (!extra_chunks)
{
return;
}
osd_op_t *subops = new osd_op_t[extra_chunks];
op_data->subops = subops;
int i = 0;
for (auto & chunk: loc_set)
{
if (!cur_set || chunk.osd_num != cur_set[chunk.role])
{
if (chunk.osd_num == this->osd_num)
{
clock_gettime(CLOCK_REALTIME, &subops[i].tv_begin);
subops[i].op_type = (uint64_t)cur_op;
subops[i].bs_op = new blockstore_op_t({
.opcode = BS_OP_DELETE,
.callback = [subop = &subops[i], this](blockstore_op_t *bs_subop)
{
handle_primary_bs_subop(subop);
},
.oid = {
.inode = op_data->oid.inode,
.stripe = op_data->oid.stripe | chunk.role,
},
// Same version as write
.version = op_data->fact_ver,
});
bs->enqueue_op(subops[i].bs_op);
}
else
{
subops[i].op_type = OSD_OP_OUT;
subops[i].send_list.push_back(subops[i].req.buf, OSD_PACKET_SIZE);
subops[i].peer_fd = c_cli.osd_peer_fds.at(chunk.osd_num);
subops[i].req.sec_del = {
.header = {
.magic = SECONDARY_OSD_OP_MAGIC,
.id = c_cli.next_subop_id++,
.opcode = OSD_OP_SECONDARY_DELETE,
},
.oid = {
.inode = op_data->oid.inode,
.stripe = op_data->oid.stripe | chunk.role,
},
// Same version as write
.version = op_data->fact_ver,
};
subops[i].callback = [cur_op, this](osd_op_t *subop)
{
int fail_fd = subop->reply.hdr.retval != 0 ? subop->peer_fd : -1;
handle_primary_subop(OSD_OP_SECONDARY_DELETE, cur_op, subop->reply.hdr.retval, 0, 0);
if (fail_fd >= 0)
{
// delete operation failed, drop the connection
c_cli.stop_client(fail_fd);
}
};
c_cli.outbox_push(&subops[i]);
}
i++;
}
}
}
void osd_t::submit_primary_sync_subops(osd_op_t *cur_op)
{
osd_primary_op_data_t *op_data = cur_op->op_data;
int n_osds = op_data->unstable_write_osds->size();
osd_op_t *subops = new osd_op_t[n_osds];
op_data->done = op_data->errors = 0;
op_data->n_subops = n_osds;
op_data->subops = subops;
for (int i = 0; i < n_osds; i++)
{
osd_num_t sync_osd = (*(op_data->unstable_write_osds))[i].osd_num;
if (sync_osd == this->osd_num)
{
clock_gettime(CLOCK_REALTIME, &subops[i].tv_begin);
subops[i].op_type = (uint64_t)cur_op;
subops[i].bs_op = new blockstore_op_t({
.opcode = BS_OP_SYNC,
.callback = [subop = &subops[i], this](blockstore_op_t *bs_subop)
{
handle_primary_bs_subop(subop);
},
});
bs->enqueue_op(subops[i].bs_op);
}
else
{
subops[i].op_type = OSD_OP_OUT;
subops[i].send_list.push_back(subops[i].req.buf, OSD_PACKET_SIZE);
subops[i].peer_fd = c_cli.osd_peer_fds.at(sync_osd);
subops[i].req.sec_sync = {
.header = {
.magic = SECONDARY_OSD_OP_MAGIC,
.id = c_cli.next_subop_id++,
.opcode = OSD_OP_SECONDARY_SYNC,
},
};
subops[i].callback = [cur_op, this](osd_op_t *subop)
{
int fail_fd = subop->reply.hdr.retval != 0 ? subop->peer_fd : -1;
handle_primary_subop(OSD_OP_SECONDARY_SYNC, cur_op, subop->reply.hdr.retval, 0, 0);
if (fail_fd >= 0)
{
// sync operation failed, drop the connection
c_cli.stop_client(fail_fd);
}
};
c_cli.outbox_push(&subops[i]);
}
}
}
void osd_t::submit_primary_stab_subops(osd_op_t *cur_op)
{
osd_primary_op_data_t *op_data = cur_op->op_data;
int n_osds = op_data->unstable_write_osds->size();
osd_op_t *subops = new osd_op_t[n_osds];
op_data->done = op_data->errors = 0;
op_data->n_subops = n_osds;
op_data->subops = subops;
for (int i = 0; i < n_osds; i++)
{
auto & stab_osd = (*(op_data->unstable_write_osds))[i];
if (stab_osd.osd_num == this->osd_num)
{
clock_gettime(CLOCK_REALTIME, &subops[i].tv_begin);
subops[i].op_type = (uint64_t)cur_op;
subops[i].bs_op = new blockstore_op_t({
.opcode = BS_OP_STABLE,
.callback = [subop = &subops[i], this](blockstore_op_t *bs_subop)
{
handle_primary_bs_subop(subop);
},
.len = (uint32_t)stab_osd.len,
.buf = (void*)(op_data->unstable_writes + stab_osd.start),
});
bs->enqueue_op(subops[i].bs_op);
}
else
{
subops[i].op_type = OSD_OP_OUT;
subops[i].send_list.push_back(subops[i].req.buf, OSD_PACKET_SIZE);
subops[i].peer_fd = c_cli.osd_peer_fds.at(stab_osd.osd_num);
subops[i].req.sec_stab = {
.header = {
.magic = SECONDARY_OSD_OP_MAGIC,
.id = c_cli.next_subop_id++,
.opcode = OSD_OP_SECONDARY_STABILIZE,
},
.len = (uint64_t)(stab_osd.len * sizeof(obj_ver_id)),
};
subops[i].send_list.push_back(op_data->unstable_writes + stab_osd.start, stab_osd.len * sizeof(obj_ver_id));
subops[i].callback = [cur_op, this](osd_op_t *subop)
{
int fail_fd = subop->reply.hdr.retval != 0 ? subop->peer_fd : -1;
handle_primary_subop(OSD_OP_SECONDARY_STABILIZE, cur_op, subop->reply.hdr.retval, 0, 0);
if (fail_fd >= 0)
{
// sync operation failed, drop the connection
c_cli.stop_client(fail_fd);
}
};
c_cli.outbox_push(&subops[i]);
}
}
}
void osd_t::pg_cancel_write_queue(pg_t & pg, object_id oid, int retval)
{
auto st_it = pg.write_queue.find(oid), it = st_it;
while (it != pg.write_queue.end() && it->first == oid)
{
finish_op(it->second, retval);
it++;
}
if (st_it != it)
{
pg.write_queue.erase(st_it, it);
}
}

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#include "cluster_client.h"
void cluster_client_t::read_requests()
{
for (int i = 0; i < read_ready_clients.size(); i++)
{
int peer_fd = read_ready_clients[i];
auto & cl = clients[peer_fd];
{
timespec now;
clock_gettime(CLOCK_REALTIME, &now);
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
}
io_uring_sqe* sqe = ringloop->get_sqe();
if (!sqe)
{
read_ready_clients.erase(read_ready_clients.begin(), read_ready_clients.begin() + i);
return;
}
ring_data_t* data = ((ring_data_t*)sqe->user_data);
if (!cl.read_op || cl.read_remaining < receive_buffer_size)
{
cl.read_iov.iov_base = cl.in_buf;
cl.read_iov.iov_len = receive_buffer_size;
}
else
{
cl.read_iov.iov_base = cl.read_buf;
cl.read_iov.iov_len = cl.read_remaining;
}
cl.read_msg.msg_iov = &cl.read_iov;
cl.read_msg.msg_iovlen = 1;
data->callback = [this, peer_fd](ring_data_t *data) { handle_read(data, peer_fd); };
my_uring_prep_recvmsg(sqe, peer_fd, &cl.read_msg, 0);
}
read_ready_clients.clear();
}
void cluster_client_t::handle_read(ring_data_t *data, int peer_fd)
{
auto cl_it = clients.find(peer_fd);
if (cl_it != clients.end())
{
auto & cl = cl_it->second;
if (data->res < 0 && data->res != -EAGAIN)
{
// this is a client socket, so don't panic. just disconnect it
printf("Client %d socket read error: %d (%s). Disconnecting client\n", peer_fd, -data->res, strerror(-data->res));
stop_client(peer_fd);
return;
}
if (data->res == -EAGAIN || cl.read_iov.iov_base == cl.in_buf && data->res < receive_buffer_size)
{
cl.read_ready--;
if (cl.read_ready > 0)
read_ready_clients.push_back(peer_fd);
}
else
{
read_ready_clients.push_back(peer_fd);
}
if (data->res == -EAGAIN)
{
return;
}
if (data->res > 0)
{
if (cl.read_iov.iov_base == cl.in_buf)
{
// Compose operation(s) from the buffer
int remain = data->res;
void *curbuf = cl.in_buf;
while (remain > 0)
{
if (!cl.read_op)
{
cl.read_op = new osd_op_t;
cl.read_op->peer_fd = peer_fd;
cl.read_op->op_type = OSD_OP_IN;
cl.read_buf = cl.read_op->req.buf;
cl.read_remaining = OSD_PACKET_SIZE;
cl.read_state = CL_READ_HDR;
}
if (cl.read_remaining > remain)
{
memcpy(cl.read_buf, curbuf, remain);
cl.read_remaining -= remain;
cl.read_buf += remain;
remain = 0;
if (cl.read_remaining <= 0)
handle_finished_read(cl);
}
else
{
memcpy(cl.read_buf, curbuf, cl.read_remaining);
curbuf += cl.read_remaining;
remain -= cl.read_remaining;
cl.read_remaining = 0;
cl.read_buf = NULL;
handle_finished_read(cl);
}
}
}
else
{
// Long data
cl.read_remaining -= data->res;
cl.read_buf += data->res;
if (cl.read_remaining <= 0)
{
handle_finished_read(cl);
}
}
}
}
}
void cluster_client_t::handle_finished_read(osd_client_t & cl)
{
if (cl.read_state == CL_READ_HDR)
{
if (cl.read_op->req.hdr.magic == SECONDARY_OSD_REPLY_MAGIC)
handle_reply_hdr(&cl);
else
handle_op_hdr(&cl);
}
else if (cl.read_state == CL_READ_DATA)
{
// Operation is ready
exec_op(cl.read_op);
cl.read_op = NULL;
cl.read_state = 0;
}
else if (cl.read_state == CL_READ_REPLY_DATA)
{
// Reply is ready
auto req_it = cl.sent_ops.find(cl.read_reply_id);
osd_op_t *request = req_it->second;
cl.sent_ops.erase(req_it);
cl.read_reply_id = 0;
delete cl.read_op;
cl.read_op = NULL;
cl.read_state = 0;
// Measure subop latency
timespec tv_end;
clock_gettime(CLOCK_REALTIME, &tv_end);
stats.subop_stat_count[request->req.hdr.opcode]++;
if (!stats.subop_stat_count[request->req.hdr.opcode])
{
stats.subop_stat_count[request->req.hdr.opcode]++;
stats.subop_stat_sum[request->req.hdr.opcode] = 0;
}
stats.subop_stat_sum[request->req.hdr.opcode] += (
(tv_end.tv_sec - request->tv_begin.tv_sec)*1000000 +
(tv_end.tv_nsec - request->tv_begin.tv_nsec)/1000
);
request->callback(request);
}
else
{
assert(0);
}
}
void cluster_client_t::handle_op_hdr(osd_client_t *cl)
{
osd_op_t *cur_op = cl->read_op;
if (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_READ)
{
if (cur_op->req.sec_rw.len > 0)
cur_op->buf = memalign(MEM_ALIGNMENT, cur_op->req.sec_rw.len);
cl->read_remaining = 0;
}
else if (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_WRITE)
{
if (cur_op->req.sec_rw.len > 0)
cur_op->buf = memalign(MEM_ALIGNMENT, cur_op->req.sec_rw.len);
cl->read_remaining = cur_op->req.sec_rw.len;
}
else if (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_STABILIZE ||
cur_op->req.hdr.opcode == OSD_OP_SECONDARY_ROLLBACK)
{
if (cur_op->req.sec_stab.len > 0)
cur_op->buf = memalign(MEM_ALIGNMENT, cur_op->req.sec_stab.len);
cl->read_remaining = cur_op->req.sec_stab.len;
}
else if (cur_op->req.hdr.opcode == OSD_OP_READ)
{
if (cur_op->req.rw.len > 0)
cur_op->buf = memalign(MEM_ALIGNMENT, cur_op->req.rw.len);
cl->read_remaining = 0;
}
else if (cur_op->req.hdr.opcode == OSD_OP_WRITE)
{
if (cur_op->req.rw.len > 0)
cur_op->buf = memalign(MEM_ALIGNMENT, cur_op->req.rw.len);
cl->read_remaining = cur_op->req.rw.len;
}
if (cl->read_remaining > 0)
{
// Read data
cl->read_buf = cur_op->buf;
cl->read_state = CL_READ_DATA;
}
else
{
// Operation is ready
cl->read_op = NULL;
cl->read_state = 0;
exec_op(cur_op);
}
}
void cluster_client_t::handle_reply_hdr(osd_client_t *cl)
{
osd_op_t *cur_op = cl->read_op;
auto req_it = cl->sent_ops.find(cur_op->req.hdr.id);
if (req_it == cl->sent_ops.end())
{
// Command out of sync. Drop connection
printf("Client %d command out of sync: id %lu\n", cl->peer_fd, cur_op->req.hdr.id);
stop_client(cl->peer_fd);
return;
}
osd_op_t *op = req_it->second;
memcpy(op->reply.buf, cur_op->req.buf, OSD_PACKET_SIZE);
if (op->reply.hdr.opcode == OSD_OP_SECONDARY_READ &&
op->reply.hdr.retval > 0)
{
// Read data. In this case we assume that the buffer is preallocated by the caller (!)
assert(op->buf);
cl->read_state = CL_READ_REPLY_DATA;
cl->read_reply_id = op->req.hdr.id;
cl->read_buf = op->buf;
cl->read_remaining = op->reply.hdr.retval;
}
else if (op->reply.hdr.opcode == OSD_OP_SECONDARY_LIST &&
op->reply.hdr.retval > 0)
{
op->buf = memalign(MEM_ALIGNMENT, sizeof(obj_ver_id) * op->reply.hdr.retval);
cl->read_state = CL_READ_REPLY_DATA;
cl->read_reply_id = op->req.hdr.id;
cl->read_buf = op->buf;
cl->read_remaining = sizeof(obj_ver_id) * op->reply.hdr.retval;
}
else if (op->reply.hdr.opcode == OSD_OP_SHOW_CONFIG &&
op->reply.hdr.retval > 0)
{
op->buf = malloc(op->reply.hdr.retval);
cl->read_state = CL_READ_REPLY_DATA;
cl->read_reply_id = op->req.hdr.id;
cl->read_buf = op->buf;
cl->read_remaining = op->reply.hdr.retval;
}
else
{
delete cl->read_op;
cl->read_state = 0;
cl->read_op = NULL;
cl->sent_ops.erase(req_it);
// Measure subop latency
timespec tv_end;
clock_gettime(CLOCK_REALTIME, &tv_end);
stats.subop_stat_count[op->req.hdr.opcode]++;
if (!stats.subop_stat_count[op->req.hdr.opcode])
{
stats.subop_stat_count[op->req.hdr.opcode]++;
stats.subop_stat_sum[op->req.hdr.opcode] = 0;
}
stats.subop_stat_sum[op->req.hdr.opcode] += (
(tv_end.tv_sec - op->tv_begin.tv_sec)*1000000 +
(tv_end.tv_nsec - op->tv_begin.tv_nsec)/1000
);
// Copy lambda to be unaffected by `delete op`
std::function<void(osd_op_t*)>(op->callback)(op);
}
}

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#include <malloc.h>
#include <string.h>
#include <assert.h>
#include "xor.h"
#include "osd_rmw.h"
static inline void extend_read(uint32_t start, uint32_t end, osd_rmw_stripe_t & stripe)
{
if (stripe.read_end == 0)
{
stripe.read_start = start;
stripe.read_end = end;
}
else
{
if (stripe.read_end < end)
stripe.read_end = end;
if (stripe.read_start > start)
stripe.read_start = start;
}
}
static inline void cover_read(uint32_t start, uint32_t end, osd_rmw_stripe_t & stripe)
{
// Subtract <to> write request from <from> request
if (start >= stripe.req_start &&
end <= stripe.req_end)
{
return;
}
if (start <= stripe.req_start &&
end >= stripe.req_start &&
end <= stripe.req_end)
{
end = stripe.req_start;
}
else if (start >= stripe.req_start &&
start <= stripe.req_end &&
end >= stripe.req_end)
{
start = stripe.req_end;
}
if (stripe.read_end == 0)
{
stripe.read_start = start;
stripe.read_end = end;
}
else
{
if (stripe.read_end < end)
stripe.read_end = end;
if (stripe.read_start > start)
stripe.read_start = start;
}
}
void split_stripes(uint64_t pg_minsize, uint32_t bs_block_size, uint32_t start, uint32_t end, osd_rmw_stripe_t *stripes)
{
if (end == 0)
{
// Zero length request - offset doesn't matter
return;
}
end = start+end;
for (int role = 0; role < pg_minsize; role++)
{
if (start < (1+role)*bs_block_size && end > role*bs_block_size)
{
stripes[role].req_start = start < role*bs_block_size ? 0 : start-role*bs_block_size;
stripes[role].req_end = end > (role+1)*bs_block_size ? bs_block_size : end-role*bs_block_size;
}
}
}
void reconstruct_stripe(osd_rmw_stripe_t *stripes, int pg_size, int role)
{
int prev = -2;
for (int other = 0; other < pg_size; other++)
{
if (other != role)
{
if (prev == -2)
{
prev = other;
}
else if (prev >= 0)
{
assert(stripes[role].read_start >= stripes[prev].read_start &&
stripes[role].read_start >= stripes[other].read_start);
memxor(
stripes[prev].read_buf + (stripes[role].read_start - stripes[prev].read_start),
stripes[other].read_buf + (stripes[role].read_start - stripes[other].read_start),
stripes[role].read_buf, stripes[role].read_end - stripes[role].read_start
);
prev = -1;
}
else
{
assert(stripes[role].read_start >= stripes[other].read_start);
memxor(
stripes[role].read_buf,
stripes[other].read_buf + (stripes[role].read_start - stripes[other].read_start),
stripes[role].read_buf, stripes[role].read_end - stripes[role].read_start
);
}
}
}
}
int extend_missing_stripes(osd_rmw_stripe_t *stripes, osd_num_t *osd_set, int minsize, int size)
{
for (int role = 0; role < minsize; role++)
{
if (stripes[role].read_end != 0 && osd_set[role] == 0)
{
stripes[role].missing = true;
// Stripe is missing. Extend read to other stripes.
// We need at least pg_minsize stripes to recover the lost part.
// FIXME: LRC EC and similar don't require to read all other stripes.
int exist = 0;
for (int j = 0; j < size; j++)
{
if (osd_set[j] != 0)
{
extend_read(stripes[role].read_start, stripes[role].read_end, stripes[j]);
exist++;
if (exist >= minsize)
{
break;
}
}
}
if (exist < minsize)
{
// Less than minsize stripes are available for this object
return -1;
}
}
}
return 0;
}
void* alloc_read_buffer(osd_rmw_stripe_t *stripes, int read_pg_size, uint64_t add_size)
{
// Calculate buffer size
uint64_t buf_size = add_size;
for (int role = 0; role < read_pg_size; role++)
{
if (stripes[role].read_end != 0)
{
buf_size += stripes[role].read_end - stripes[role].read_start;
}
}
// Allocate buffer
void *buf = memalign(MEM_ALIGNMENT, buf_size);
uint64_t buf_pos = add_size;
for (int role = 0; role < read_pg_size; role++)
{
if (stripes[role].read_end != 0)
{
stripes[role].read_buf = buf + buf_pos;
buf_pos += stripes[role].read_end - stripes[role].read_start;
}
}
return buf;
}
void* calc_rmw(void *request_buf, osd_rmw_stripe_t *stripes, uint64_t *read_osd_set,
uint64_t pg_size, uint64_t pg_minsize, uint64_t pg_cursize, uint64_t *write_osd_set, uint64_t chunk_size)
{
// Generic parity modification (read-modify-write) algorithm
// Read -> Reconstruct missing chunks -> Calc parity chunks -> Write
// Now we always read continuous ranges. This means that an update of the beginning
// of one data stripe and the end of another will lead to a read of full paired stripes.
// FIXME: (Maybe) read small individual ranges in that case instead.
uint32_t start = 0, end = 0;
for (int role = 0; role < pg_minsize; role++)
{
if (stripes[role].req_end != 0)
{
start = !end || stripes[role].req_start < start ? stripes[role].req_start : start;
end = std::max(stripes[role].req_end, end);
stripes[role].write_start = stripes[role].req_start;
stripes[role].write_end = stripes[role].req_end;
}
}
int write_parity = 0;
for (int role = pg_minsize; role < pg_size; role++)
{
if (write_osd_set[role] != 0)
{
write_parity = 1;
stripes[role].write_start = start;
stripes[role].write_end = end;
}
}
if (write_parity)
{
for (int role = 0; role < pg_minsize; role++)
{
cover_read(start, end, stripes[role]);
}
}
if (write_osd_set != read_osd_set)
{
pg_cursize = 0;
// Object is degraded/misplaced and will be moved to <write_osd_set>
for (int role = 0; role < pg_size; role++)
{
if (write_osd_set[role] != read_osd_set[role])
{
// FIXME: For EC more than 2+1: handle case when write_osd_set == 0 and read_osd_set != 0
// We need to get data for any moved / recovered chunk
// And we need a continuous write buffer so we'll only optimize
// for the case when the whole chunk is ovewritten in the request
if (stripes[role].req_start != 0 ||
stripes[role].req_end != chunk_size)
{
stripes[role].read_start = 0;
stripes[role].read_end = chunk_size;
// Warning: We don't modify write_start/write_end here, we do it in calc_rmw_parity()
}
}
if (read_osd_set[role] != 0)
{
pg_cursize++;
}
}
}
if (pg_cursize < pg_size)
{
// Some stripe(s) are missing, so we need to read parity
for (int role = 0; role < pg_size; role++)
{
if (read_osd_set[role] == 0)
{
stripes[role].missing = true;
if (stripes[role].read_end != 0)
{
int found = 0;
for (int r2 = 0; r2 < pg_size && found < pg_minsize; r2++)
{
// Read the non-covered range of <role> from at least <minsize> other stripes to reconstruct it
if (read_osd_set[r2] != 0)
{
extend_read(stripes[role].read_start, stripes[role].read_end, stripes[r2]);
found++;
}
}
if (found < pg_minsize)
{
// FIXME Object is incomplete - refuse partial overwrite
assert(0);
}
}
}
}
}
// Allocate read buffers
void *rmw_buf = alloc_read_buffer(stripes, pg_size, (write_parity ? pg_size-pg_minsize : 0) * (end - start));
// Position write buffers
uint64_t buf_pos = 0, in_pos = 0;
for (int role = 0; role < pg_size; role++)
{
if (stripes[role].req_end != 0)
{
stripes[role].write_buf = request_buf + in_pos;
in_pos += stripes[role].req_end - stripes[role].req_start;
}
else if (role >= pg_minsize && write_osd_set[role] != 0 && end != 0)
{
stripes[role].write_buf = rmw_buf + buf_pos;
buf_pos += end - start;
}
}
return rmw_buf;
}
static void get_old_new_buffers(osd_rmw_stripe_t & stripe, uint32_t wr_start, uint32_t wr_end, buf_len_t *bufs, int & nbufs)
{
uint32_t ns = 0, ne = 0, os = 0, oe = 0;
if (stripe.req_end > wr_start &&
stripe.req_start < wr_end)
{
ns = std::max(stripe.req_start, wr_start);
ne = std::min(stripe.req_end, wr_end);
}
if (stripe.read_end > wr_start &&
stripe.read_start < wr_end)
{
os = std::max(stripe.read_start, wr_start);
oe = std::min(stripe.read_end, wr_end);
}
if (ne && (!oe || ns <= os))
{
// NEW or NEW->OLD
bufs[nbufs++] = { .buf = stripe.write_buf + ns - stripe.req_start, .len = ne-ns };
if (os < ne)
os = ne;
if (oe > os)
{
// NEW->OLD
bufs[nbufs++] = { .buf = stripe.read_buf + os - stripe.read_start, .len = oe-os };
}
}
else if (oe)
{
// OLD or OLD->NEW or OLD->NEW->OLD
if (ne)
{
// OLD->NEW or OLD->NEW->OLD
bufs[nbufs++] = { .buf = stripe.read_buf + os - stripe.read_start, .len = ns-os };
bufs[nbufs++] = { .buf = stripe.write_buf + ns - stripe.req_start, .len = ne-ns };
if (oe > ne)
{
// OLD->NEW->OLD
bufs[nbufs++] = { .buf = stripe.read_buf + ne - stripe.read_start, .len = oe-ne };
}
}
else
{
// OLD
bufs[nbufs++] = { .buf = stripe.read_buf + os - stripe.read_start, .len = oe-os };
}
}
}
static void xor_multiple_buffers(buf_len_t *xor1, int n1, buf_len_t *xor2, int n2, void *dest, uint32_t len)
{
assert(n1 > 0 && n2 > 0);
int i1 = 0, i2 = 0;
uint32_t start1 = 0, start2 = 0, end1 = xor1[0].len, end2 = xor2[0].len;
uint32_t pos = 0;
while (pos < len)
{
// We know for sure that ranges overlap
uint32_t end = std::min(end1, end2);
memxor(xor1[i1].buf + pos-start1, xor2[i2].buf + pos-start2, dest+pos, end-pos);
pos = end;
if (pos >= end1)
{
i1++;
if (i1 >= n1)
{
assert(pos >= end2);
return;
}
start1 = end1;
end1 += xor1[i1].len;
}
if (pos >= end2)
{
i2++;
start2 = end2;
end2 += xor2[i2].len;
}
}
}
void calc_rmw_parity(osd_rmw_stripe_t *stripes, int pg_size, uint64_t *read_osd_set, uint64_t *write_osd_set, uint32_t chunk_size)
{
int pg_minsize = pg_size-1;
for (int role = 0; role < pg_size; role++)
{
if (stripes[role].read_end != 0 && stripes[role].missing)
{
// Reconstruct missing stripe (EC k+1)
reconstruct_stripe(stripes, pg_size, role);
break;
}
}
uint32_t start = 0, end = 0;
if (!stripes[pg_minsize].missing || write_osd_set != read_osd_set)
{
for (int role = 0; role < pg_minsize; role++)
{
if (stripes[role].req_end != 0)
{
start = !end || stripes[role].req_start < start ? stripes[role].req_start : start;
end = std::max(stripes[role].req_end, end);
}
}
}
if (write_osd_set != read_osd_set)
{
for (int role = 0; role < pg_minsize; role++)
{
if (write_osd_set[role] != read_osd_set[role] &&
(stripes[role].req_start != 0 || stripes[role].req_end != chunk_size))
{
// FIXME again, handle case when write_osd_set[role] is 0
// Copy modified chunk into the read buffer to write it back
memcpy(
stripes[role].read_buf + stripes[role].req_start,
stripes[role].write_buf,
stripes[role].req_end - stripes[role].req_start
);
stripes[role].write_buf = stripes[role].read_buf;
stripes[role].write_start = 0;
stripes[role].write_end = chunk_size;
}
}
}
if (!stripes[pg_minsize].missing && end != 0)
{
// Calculate new parity (EC k+1)
int parity = pg_minsize, prev = -2;
for (int other = 0; other < pg_minsize; other++)
{
if (prev == -2)
{
prev = other;
}
else
{
int n1 = 0, n2 = 0;
buf_len_t xor1[3], xor2[3];
if (prev == -1)
{
xor1[n1++] = { .buf = stripes[parity].write_buf, .len = end-start };
}
else
{
get_old_new_buffers(stripes[prev], start, end, xor1, n1);
prev = -1;
}
get_old_new_buffers(stripes[other], start, end, xor2, n2);
xor_multiple_buffers(xor1, n1, xor2, n2, stripes[parity].write_buf, end-start);
}
}
}
if (write_osd_set != read_osd_set)
{
for (int role = pg_minsize; role < pg_size; role++)
{
if (write_osd_set[role] != read_osd_set[role] && (start != 0 || end != chunk_size))
{
// Copy new parity into the read buffer to write it back
memcpy(
stripes[role].read_buf + start,
stripes[role].write_buf,
end - start
);
stripes[role].write_buf = stripes[role].read_buf;
stripes[role].write_start = 0;
stripes[role].write_end = chunk_size;
}
}
}
}

37
osd_rmw.h Normal file
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#pragma once
#include <stdint.h>
#include "object_id.h"
#include "osd_id.h"
#ifndef MEM_ALIGNMENT
#define MEM_ALIGNMENT 512
#endif
struct buf_len_t
{
void *buf;
uint64_t len;
};
struct osd_rmw_stripe_t
{
void *read_buf, *write_buf;
uint32_t req_start, req_end;
uint32_t read_start, read_end;
uint32_t write_start, write_end;
bool missing;
};
void split_stripes(uint64_t pg_minsize, uint32_t bs_block_size, uint32_t start, uint32_t len, osd_rmw_stripe_t *stripes);
void reconstruct_stripe(osd_rmw_stripe_t *stripes, int pg_size, int role);
int extend_missing_stripes(osd_rmw_stripe_t *stripes, osd_num_t *osd_set, int minsize, int size);
void* alloc_read_buffer(osd_rmw_stripe_t *stripes, int read_pg_size, uint64_t add_size);
void* calc_rmw(void *request_buf, osd_rmw_stripe_t *stripes, uint64_t *read_osd_set,
uint64_t pg_size, uint64_t pg_minsize, uint64_t pg_cursize, uint64_t *write_osd_set, uint64_t chunk_size);
void calc_rmw_parity(osd_rmw_stripe_t *stripes, int pg_size, uint64_t *read_osd_set, uint64_t *write_osd_set, uint32_t chunk_size);

360
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#include <string.h>
#include "osd_rmw.cpp"
#include "test_pattern.h"
void dump_stripes(osd_rmw_stripe_t *stripes, int pg_size);
void test1();
void test4();
void test5();
void test6();
void test7();
void test8();
void test9();
/***
Cases:
1. split(offset=128K-4K, len=8K)
= [ [ 128K-4K, 128K ], [ 0, 4K ], [ 0, 0 ] ]
2. read(offset=128K-4K, len=8K, osd_set=[1,0,3])
= { read: [ [ 0, 128K ], [ 0, 4K ], [ 0, 4K ] ] }
3. cover_read(0, 128K, { req: [ 128K-4K, 4K ] })
= { read: [ 0, 128K-4K ] }
4. write(offset=128K-4K, len=8K, osd_set=[1,0,3])
= {
read: [ [ 0, 128K ], [ 4K, 128K ], [ 4K, 128K ] ],
write: [ [ 128K-4K, 128K ], [ 0, 4K ], [ 0, 128K ] ],
input buffer: [ write0, write1 ],
rmw buffer: [ write2, read0, read1, read2 ],
}
+ check write2 buffer
5. write(offset=0, len=128K+64K, osd_set=[1,0,3])
= {
req: [ [ 0, 128K ], [ 0, 64K ], [ 0, 0 ] ],
read: [ [ 64K, 128K ], [ 64K, 128K ], [ 64K, 128K ] ],
write: [ [ 0, 128K ], [ 0, 64K ], [ 0, 128K ] ],
input buffer: [ write0, write1 ],
rmw buffer: [ write2, read0, read1, read2 ],
}
6. write(offset=0, len=128K+64K, osd_set=[1,2,3])
= {
req: [ [ 0, 128K ], [ 0, 64K ], [ 0, 0 ] ],
read: [ [ 0, 0 ], [ 64K, 128K ], [ 0, 0 ] ],
write: [ [ 0, 128K ], [ 0, 64K ], [ 0, 128K ] ],
input buffer: [ write0, write1 ],
rmw buffer: [ write2, read1 ],
}
7. calc_rmw(offset=128K-4K, len=8K, osd_set=[1,0,3], write_set=[1,2,3])
= {
read: [ [ 0, 128K ], [ 0, 128K ], [ 0, 128K ] ],
write: [ [ 128K-4K, 128K ], [ 0, 4K ], [ 0, 128K ] ],
input buffer: [ write0, write1 ],
rmw buffer: [ write2, read0, read1, read2 ],
}
then, after calc_rmw_parity(): {
write: [ [ 128K-4K, 128K ], [ 0, 128K ], [ 0, 128K ] ],
write1==read1,
}
+ check write1 buffer
+ check write2 buffer
8. calc_rmw(offset=0, len=128K+4K, osd_set=[0,2,3], write_set=[1,2,3])
= {
read: [ [ 0, 0 ], [ 4K, 128K ], [ 0, 0 ] ],
write: [ [ 0, 128K ], [ 0, 4K ], [ 0, 128K ] ],
input buffer: [ write0, write1 ],
rmw buffer: [ write2, read1 ],
}
+ check write2 buffer
9. object recovery case:
calc_rmw(offset=0, len=0, read_osd_set=[0,2,3], write_osd_set=[1,2,3])
= {
read: [ [ 0, 128K ], [ 0, 128K ], [ 0, 128K ] ],
write: [ [ 0, 0 ], [ 0, 0 ], [ 0, 0 ] ],
input buffer: NULL,
rmw buffer: [ read0, read1, read2 ],
}
then, after calc_rmw_parity(): {
write: [ [ 0, 128K ], [ 0, 0 ], [ 0, 0 ] ],
write0==read0,
}
+ check write0 buffer
***/
int main(int narg, char *args[])
{
// Test 1
test1();
// Test 4
test4();
// Test 5
test5();
// Test 6
test6();
// Test 7
test7();
// Test 8
test8();
// Test 9
test9();
// End
printf("all ok\n");
return 0;
}
void dump_stripes(osd_rmw_stripe_t *stripes, int pg_size)
{
printf("request");
for (int i = 0; i < pg_size; i++)
{
printf(" {%uK-%uK}", stripes[i].req_start/1024, stripes[i].req_end/1024);
}
printf("\n");
printf("read");
for (int i = 0; i < pg_size; i++)
{
printf(" {%uK-%uK}", stripes[i].read_start/1024, stripes[i].read_end/1024);
}
printf("\n");
printf("write");
for (int i = 0; i < pg_size; i++)
{
printf(" {%uK-%uK}", stripes[i].write_start/1024, stripes[i].write_end/1024);
}
printf("\n");
}
void test1()
{
osd_num_t osd_set[3] = { 1, 0, 3 };
osd_rmw_stripe_t stripes[3] = { 0 };
// Test 1.1
split_stripes(2, 128*1024, 128*1024-4096, 8192, stripes);
assert(stripes[0].req_start == 128*1024-4096 && stripes[0].req_end == 128*1024);
assert(stripes[1].req_start == 0 && stripes[1].req_end == 4096);
assert(stripes[2].req_end == 0);
// Test 1.2
for (int i = 0; i < 3; i++)
{
stripes[i].read_start = stripes[i].req_start;
stripes[i].read_end = stripes[i].req_end;
}
assert(extend_missing_stripes(stripes, osd_set, 2, 3) == 0);
assert(stripes[0].read_start == 0 && stripes[0].read_end == 128*1024);
assert(stripes[2].read_start == 0 && stripes[2].read_end == 4096);
// Test 1.3
stripes[0] = { .req_start = 128*1024-4096, .req_end = 128*1024 };
cover_read(0, 128*1024, stripes[0]);
assert(stripes[0].read_start == 0 && stripes[0].read_end == 128*1024-4096);
}
void test4()
{
osd_num_t osd_set[3] = { 1, 0, 3 };
osd_rmw_stripe_t stripes[3] = { 0 };
// Test 4.1
split_stripes(2, 128*1024, 128*1024-4096, 8192, stripes);
void* write_buf = malloc(8192);
void* rmw_buf = calc_rmw(write_buf, stripes, osd_set, 3, 2, 2, osd_set, 128*1024);
assert(stripes[0].read_start == 0 && stripes[0].read_end == 128*1024);
assert(stripes[1].read_start == 4096 && stripes[1].read_end == 128*1024);
assert(stripes[2].read_start == 4096 && stripes[2].read_end == 128*1024);
assert(stripes[0].write_start == 128*1024-4096 && stripes[0].write_end == 128*1024);
assert(stripes[1].write_start == 0 && stripes[1].write_end == 4096);
assert(stripes[2].write_start == 0 && stripes[2].write_end == 128*1024);
assert(stripes[0].read_buf == rmw_buf+128*1024);
assert(stripes[1].read_buf == rmw_buf+128*1024*2);
assert(stripes[2].read_buf == rmw_buf+128*1024*3-4096);
assert(stripes[0].write_buf == write_buf);
assert(stripes[1].write_buf == write_buf+4096);
assert(stripes[2].write_buf == rmw_buf);
// Test 4.2
set_pattern(write_buf, 8192, PATTERN0);
set_pattern(stripes[0].read_buf, 128*1024, PATTERN1); // old data
set_pattern(stripes[1].read_buf, 128*1024-4096, UINT64_MAX); // didn't read it, it's missing
set_pattern(stripes[2].read_buf, 128*1024-4096, 0); // old parity = 0
calc_rmw_parity(stripes, 3, osd_set, osd_set, 128*1024);
check_pattern(stripes[2].write_buf, 4096, PATTERN0^PATTERN1); // new parity
check_pattern(stripes[2].write_buf+4096, 128*1024-4096*2, 0); // new parity
check_pattern(stripes[2].write_buf+128*1024-4096, 4096, PATTERN0^PATTERN1); // new parity
free(rmw_buf);
free(write_buf);
}
void test5()
{
osd_num_t osd_set[3] = { 1, 0, 3 };
osd_rmw_stripe_t stripes[3] = { 0 };
// Test 5.1
split_stripes(2, 128*1024, 0, 64*1024*3, stripes);
assert(stripes[0].req_start == 0 && stripes[0].req_end == 128*1024);
assert(stripes[1].req_start == 0 && stripes[1].req_end == 64*1024);
assert(stripes[2].req_end == 0);
// Test 5.2
void *write_buf = malloc(64*1024*3);
void *rmw_buf = calc_rmw(write_buf, stripes, osd_set, 3, 2, 2, osd_set, 128*1024);
assert(stripes[0].read_start == 64*1024 && stripes[0].read_end == 128*1024);
assert(stripes[1].read_start == 64*1024 && stripes[1].read_end == 128*1024);
assert(stripes[2].read_start == 64*1024 && stripes[2].read_end == 128*1024);
assert(stripes[0].write_start == 0 && stripes[0].write_end == 128*1024);
assert(stripes[1].write_start == 0 && stripes[1].write_end == 64*1024);
assert(stripes[2].write_start == 0 && stripes[2].write_end == 128*1024);
assert(stripes[0].read_buf == rmw_buf+128*1024);
assert(stripes[1].read_buf == rmw_buf+64*3*1024);
assert(stripes[2].read_buf == rmw_buf+64*4*1024);
assert(stripes[0].write_buf == write_buf);
assert(stripes[1].write_buf == write_buf+128*1024);
assert(stripes[2].write_buf == rmw_buf);
free(rmw_buf);
free(write_buf);
}
void test6()
{
osd_num_t osd_set[3] = { 1, 2, 3 };
osd_rmw_stripe_t stripes[3] = { 0 };
// Test 6.1
split_stripes(2, 128*1024, 0, 64*1024*3, stripes);
void *write_buf = malloc(64*1024*3);
void *rmw_buf = calc_rmw(write_buf, stripes, osd_set, 3, 2, 3, osd_set, 128*1024);
assert(stripes[0].read_end == 0);
assert(stripes[1].read_start == 64*1024 && stripes[1].read_end == 128*1024);
assert(stripes[2].read_end == 0);
assert(stripes[0].write_start == 0 && stripes[0].write_end == 128*1024);
assert(stripes[1].write_start == 0 && stripes[1].write_end == 64*1024);
assert(stripes[2].write_start == 0 && stripes[2].write_end == 128*1024);
assert(stripes[0].read_buf == 0);
assert(stripes[1].read_buf == rmw_buf+128*1024);
assert(stripes[2].read_buf == 0);
assert(stripes[0].write_buf == write_buf);
assert(stripes[1].write_buf == write_buf+128*1024);
assert(stripes[2].write_buf == rmw_buf);
free(rmw_buf);
free(write_buf);
}
void test7()
{
osd_num_t osd_set[3] = { 1, 0, 3 };
osd_num_t write_osd_set[3] = { 1, 2, 3 };
osd_rmw_stripe_t stripes[3] = { 0 };
// Test 7.1
split_stripes(2, 128*1024, 128*1024-4096, 8192, stripes);
void *write_buf = malloc(8192);
void *rmw_buf = calc_rmw(write_buf, stripes, osd_set, 3, 2, 2, write_osd_set, 128*1024);
assert(stripes[0].read_start == 0 && stripes[0].read_end == 128*1024);
assert(stripes[1].read_start == 0 && stripes[1].read_end == 128*1024);
assert(stripes[2].read_start == 0 && stripes[2].read_end == 128*1024);
assert(stripes[0].write_start == 128*1024-4096 && stripes[0].write_end == 128*1024);
assert(stripes[1].write_start == 0 && stripes[1].write_end == 4096);
assert(stripes[2].write_start == 0 && stripes[2].write_end == 128*1024);
assert(stripes[0].read_buf == rmw_buf+128*1024);
assert(stripes[1].read_buf == rmw_buf+128*1024*2);
assert(stripes[2].read_buf == rmw_buf+128*1024*3);
assert(stripes[0].write_buf == write_buf);
assert(stripes[1].write_buf == write_buf+4096);
assert(stripes[2].write_buf == rmw_buf);
// Test 7.2
set_pattern(write_buf, 8192, PATTERN0);
set_pattern(stripes[0].read_buf, 128*1024, PATTERN1); // old data
set_pattern(stripes[1].read_buf, 128*1024, UINT64_MAX); // didn't read it, it's missing
set_pattern(stripes[2].read_buf, 128*1024, 0); // old parity = 0
calc_rmw_parity(stripes, 3, osd_set, write_osd_set, 128*1024);
assert(stripes[0].write_start == 128*1024-4096 && stripes[0].write_end == 128*1024);
assert(stripes[1].write_start == 0 && stripes[1].write_end == 128*1024);
assert(stripes[2].write_start == 0 && stripes[2].write_end == 128*1024);
assert(stripes[1].write_buf == stripes[1].read_buf);
check_pattern(stripes[1].write_buf, 4096, PATTERN0);
check_pattern(stripes[1].write_buf+4096, 128*1024-4096, PATTERN1);
check_pattern(stripes[2].write_buf, 4096, PATTERN0^PATTERN1); // new parity
check_pattern(stripes[2].write_buf+4096, 128*1024-4096*2, 0); // new parity
check_pattern(stripes[2].write_buf+128*1024-4096, 4096, PATTERN0^PATTERN1); // new parity
free(rmw_buf);
free(write_buf);
}
void test8()
{
osd_num_t osd_set[3] = { 0, 2, 3 };
osd_num_t write_osd_set[3] = { 1, 2, 3 };
osd_rmw_stripe_t stripes[3] = { 0 };
// Test 8.1
split_stripes(2, 128*1024, 0, 128*1024+4096, stripes);
void *write_buf = malloc(128*1024+4096);
void *rmw_buf = calc_rmw(write_buf, stripes, osd_set, 3, 2, 2, write_osd_set, 128*1024);
assert(stripes[0].read_start == 0 && stripes[0].read_end == 0);
assert(stripes[1].read_start == 4096 && stripes[1].read_end == 128*1024);
assert(stripes[2].read_start == 0 && stripes[2].read_end == 0);
assert(stripes[0].write_start == 0 && stripes[0].write_end == 128*1024);
assert(stripes[1].write_start == 0 && stripes[1].write_end == 4096);
assert(stripes[2].write_start == 0 && stripes[2].write_end == 128*1024);
assert(stripes[0].read_buf == NULL);
assert(stripes[1].read_buf == rmw_buf+128*1024);
assert(stripes[2].read_buf == NULL);
assert(stripes[0].write_buf == write_buf);
assert(stripes[1].write_buf == write_buf+128*1024);
assert(stripes[2].write_buf == rmw_buf);
// Test 8.2
set_pattern(write_buf, 128*1024+4096, PATTERN0);
set_pattern(stripes[1].read_buf, 128*1024-4096, PATTERN1);
calc_rmw_parity(stripes, 3, osd_set, write_osd_set, 128*1024);
assert(stripes[0].write_start == 0 && stripes[0].write_end == 128*1024); // recheck again
assert(stripes[1].write_start == 0 && stripes[1].write_end == 4096); // recheck again
assert(stripes[2].write_start == 0 && stripes[2].write_end == 128*1024); // recheck again
assert(stripes[0].write_buf == write_buf); // recheck again
assert(stripes[1].write_buf == write_buf+128*1024); // recheck again
assert(stripes[2].write_buf == rmw_buf); // recheck again
check_pattern(stripes[2].write_buf, 4096, 0); // new parity
check_pattern(stripes[2].write_buf+4096, 128*1024-4096, PATTERN0^PATTERN1); // new parity
free(rmw_buf);
free(write_buf);
}
void test9()
{
osd_num_t osd_set[3] = { 0, 2, 3 };
osd_num_t write_osd_set[3] = { 1, 2, 3 };
osd_rmw_stripe_t stripes[3] = { 0 };
// Test 9.0
split_stripes(2, 128*1024, 64*1024, 0, stripes);
assert(stripes[0].req_start == 0 && stripes[0].req_end == 0);
assert(stripes[1].req_start == 0 && stripes[1].req_end == 0);
assert(stripes[2].req_start == 0 && stripes[2].req_end == 0);
// Test 9.1
void *write_buf = NULL;
void *rmw_buf = calc_rmw(write_buf, stripes, osd_set, 3, 2, 3, write_osd_set, 128*1024);
assert(stripes[0].read_start == 0 && stripes[0].read_end == 128*1024);
assert(stripes[1].read_start == 0 && stripes[1].read_end == 128*1024);
assert(stripes[2].read_start == 0 && stripes[2].read_end == 128*1024);
assert(stripes[0].write_start == 0 && stripes[0].write_end == 0);
assert(stripes[1].write_start == 0 && stripes[1].write_end == 0);
assert(stripes[2].write_start == 0 && stripes[2].write_end == 0);
assert(stripes[0].read_buf == rmw_buf);
assert(stripes[1].read_buf == rmw_buf+128*1024);
assert(stripes[2].read_buf == rmw_buf+128*1024*2);
assert(stripes[0].write_buf == NULL);
assert(stripes[1].write_buf == NULL);
assert(stripes[2].write_buf == NULL);
// Test 8.2
set_pattern(stripes[1].read_buf, 128*1024, 0);
set_pattern(stripes[2].read_buf, 128*1024, PATTERN1);
calc_rmw_parity(stripes, 3, osd_set, write_osd_set, 128*1024);
assert(stripes[0].write_start == 0 && stripes[0].write_end == 128*1024);
assert(stripes[1].write_start == 0 && stripes[1].write_end == 0);
assert(stripes[2].write_start == 0 && stripes[2].write_end == 0);
assert(stripes[0].write_buf == rmw_buf);
assert(stripes[1].write_buf == NULL);
assert(stripes[2].write_buf == NULL);
check_pattern(stripes[0].read_buf, 128*1024, PATTERN1);
check_pattern(stripes[0].write_buf, 128*1024, PATTERN1);
free(rmw_buf);
}

View File

@ -1,38 +1,30 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include "osd.h"
#include "json11/json11.hpp"
void osd_t::secondary_op_callback(osd_op_t *op)
{
if (op->req.hdr.opcode == OSD_OP_SEC_READ ||
op->req.hdr.opcode == OSD_OP_SEC_WRITE ||
op->req.hdr.opcode == OSD_OP_SEC_WRITE_STABLE)
if (op->req.hdr.opcode == OSD_OP_SECONDARY_READ ||
op->req.hdr.opcode == OSD_OP_SECONDARY_WRITE)
{
op->reply.sec_rw.version = op->bs_op->version;
}
else if (op->req.hdr.opcode == OSD_OP_SEC_DELETE)
else if (op->req.hdr.opcode == OSD_OP_SECONDARY_DELETE)
{
op->reply.sec_del.version = op->bs_op->version;
}
if (op->req.hdr.opcode == OSD_OP_SEC_READ)
if (op->req.hdr.opcode == OSD_OP_SECONDARY_READ &&
op->bs_op->retval > 0)
{
if (op->bs_op->retval >= 0)
op->reply.sec_rw.attr_len = clean_entry_bitmap_size;
else
op->reply.sec_rw.attr_len = 0;
if (op->bs_op->retval > 0)
op->iov.push_back(op->buf, op->bs_op->retval);
op->send_list.push_back(op->buf, op->bs_op->retval);
}
else if (op->req.hdr.opcode == OSD_OP_SEC_LIST)
else if (op->req.hdr.opcode == OSD_OP_SECONDARY_LIST)
{
// allocated by blockstore
op->buf = op->bs_op->buf;
if (op->bs_op->retval > 0)
{
op->iov.push_back(op->buf, op->bs_op->retval * sizeof(obj_ver_id));
op->send_list.push_back(op->buf, op->bs_op->retval * sizeof(obj_ver_id));
}
op->reply.sec_list.stable_count = op->bs_op->version;
}
@ -46,40 +38,27 @@ void osd_t::exec_secondary(osd_op_t *cur_op)
{
cur_op->bs_op = new blockstore_op_t();
cur_op->bs_op->callback = [this, cur_op](blockstore_op_t* bs_op) { secondary_op_callback(cur_op); };
cur_op->bs_op->opcode = (cur_op->req.hdr.opcode == OSD_OP_SEC_READ ? BS_OP_READ
: (cur_op->req.hdr.opcode == OSD_OP_SEC_WRITE ? BS_OP_WRITE
: (cur_op->req.hdr.opcode == OSD_OP_SEC_WRITE_STABLE ? BS_OP_WRITE_STABLE
: (cur_op->req.hdr.opcode == OSD_OP_SEC_SYNC ? BS_OP_SYNC
: (cur_op->req.hdr.opcode == OSD_OP_SEC_STABILIZE ? BS_OP_STABLE
: (cur_op->req.hdr.opcode == OSD_OP_SEC_ROLLBACK ? BS_OP_ROLLBACK
: (cur_op->req.hdr.opcode == OSD_OP_SEC_DELETE ? BS_OP_DELETE
: (cur_op->req.hdr.opcode == OSD_OP_SEC_LIST ? BS_OP_LIST
: -1))))))));
if (cur_op->req.hdr.opcode == OSD_OP_SEC_READ ||
cur_op->req.hdr.opcode == OSD_OP_SEC_WRITE ||
cur_op->req.hdr.opcode == OSD_OP_SEC_WRITE_STABLE)
cur_op->bs_op->opcode = (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_READ ? BS_OP_READ
: (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_WRITE ? BS_OP_WRITE
: (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_SYNC ? BS_OP_SYNC
: (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_STABILIZE ? BS_OP_STABLE
: (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_ROLLBACK ? BS_OP_ROLLBACK
: (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_DELETE ? BS_OP_DELETE
: (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_LIST ? BS_OP_LIST
: -1)))))));
if (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_READ ||
cur_op->req.hdr.opcode == OSD_OP_SECONDARY_WRITE)
{
if (cur_op->req.hdr.opcode == OSD_OP_SEC_READ)
{
// Allocate memory for the read operation
if (clean_entry_bitmap_size > sizeof(unsigned))
cur_op->bitmap = cur_op->rmw_buf = malloc_or_die(clean_entry_bitmap_size);
else
cur_op->bitmap = &cur_op->bmp_data;
if (cur_op->req.sec_rw.len > 0)
cur_op->buf = memalign_or_die(MEM_ALIGNMENT, cur_op->req.sec_rw.len);
}
cur_op->bs_op->oid = cur_op->req.sec_rw.oid;
cur_op->bs_op->version = cur_op->req.sec_rw.version;
cur_op->bs_op->offset = cur_op->req.sec_rw.offset;
cur_op->bs_op->len = cur_op->req.sec_rw.len;
cur_op->bs_op->buf = cur_op->buf;
cur_op->bs_op->bitmap = cur_op->bitmap;
#ifdef OSD_STUB
cur_op->bs_op->retval = cur_op->bs_op->len;
#endif
}
else if (cur_op->req.hdr.opcode == OSD_OP_SEC_DELETE)
else if (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_DELETE)
{
cur_op->bs_op->oid = cur_op->req.sec_del.oid;
cur_op->bs_op->version = cur_op->req.sec_del.version;
@ -87,8 +66,8 @@ void osd_t::exec_secondary(osd_op_t *cur_op)
cur_op->bs_op->retval = 0;
#endif
}
else if (cur_op->req.hdr.opcode == OSD_OP_SEC_STABILIZE ||
cur_op->req.hdr.opcode == OSD_OP_SEC_ROLLBACK)
else if (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_STABILIZE ||
cur_op->req.hdr.opcode == OSD_OP_SECONDARY_ROLLBACK)
{
cur_op->bs_op->len = cur_op->req.sec_stab.len/sizeof(obj_ver_id);
cur_op->bs_op->buf = cur_op->buf;
@ -96,12 +75,11 @@ void osd_t::exec_secondary(osd_op_t *cur_op)
cur_op->bs_op->retval = 0;
#endif
}
else if (cur_op->req.hdr.opcode == OSD_OP_SEC_LIST)
else if (cur_op->req.hdr.opcode == OSD_OP_SECONDARY_LIST)
{
if (cur_op->req.sec_list.pg_count < cur_op->req.sec_list.list_pg)
{
// requested pg number is greater than total pg count
printf("Invalid LIST request: pg count %u < pg number %u\n", cur_op->req.sec_list.pg_count, cur_op->req.sec_list.list_pg);
cur_op->bs_op->retval = -EINVAL;
secondary_op_callback(cur_op);
return;
@ -109,8 +87,6 @@ void osd_t::exec_secondary(osd_op_t *cur_op)
cur_op->bs_op->oid.stripe = cur_op->req.sec_list.pg_stripe_size;
cur_op->bs_op->len = cur_op->req.sec_list.pg_count;
cur_op->bs_op->offset = cur_op->req.sec_list.list_pg - 1;
cur_op->bs_op->oid.inode = cur_op->req.sec_list.min_inode;
cur_op->bs_op->version = cur_op->req.sec_list.max_inode;
#ifdef OSD_STUB
cur_op->bs_op->retval = 0;
cur_op->bs_op->buf = NULL;
@ -127,9 +103,9 @@ void osd_t::exec_show_config(osd_op_t *cur_op)
{
// FIXME: Send the real config, not its source
std::string cfg_str = json11::Json(config).dump();
cur_op->buf = malloc_or_die(cfg_str.size()+1);
cur_op->buf = malloc(cfg_str.size()+1);
memcpy(cur_op->buf, cfg_str.c_str(), cfg_str.size()+1);
cur_op->iov.push_back(cur_op->buf, cfg_str.size()+1);
cur_op->send_list.push_back(cur_op->buf, cfg_str.size()+1);
finish_op(cur_op, cfg_str.size()+1);
}

145
osd_send.cpp Normal file
View File

@ -0,0 +1,145 @@
#include "cluster_client.h"
void cluster_client_t::outbox_push(osd_op_t *cur_op)
{
assert(cur_op->peer_fd);
auto & cl = clients.at(cur_op->peer_fd);
if (cur_op->op_type == OSD_OP_OUT)
{
clock_gettime(CLOCK_REALTIME, &cur_op->tv_begin);
}
cl.outbox.push_back(cur_op);
if (cl.write_op || cl.outbox.size() > 1 || !try_send(cl))
{
if (cl.write_state == 0)
{
cl.write_state = CL_WRITE_READY;
write_ready_clients.push_back(cur_op->peer_fd);
}
ringloop->wakeup();
}
else
ringloop->submit();
}
bool cluster_client_t::try_send(osd_client_t & cl)
{
int peer_fd = cl.peer_fd;
{
timespec now;
clock_gettime(CLOCK_REALTIME, &now);
printf("get_sqe %s %d %ld.%06ld\n", __FILE__, __LINE__, now.tv_sec, now.tv_nsec/1000);
}
io_uring_sqe* sqe = ringloop->get_sqe();
if (!sqe)
{
return false;
}
ring_data_t* data = ((ring_data_t*)sqe->user_data);
if (!cl.write_op)
{
// pick next command
cl.write_op = cl.outbox.front();
cl.outbox.pop_front();
cl.write_state = CL_WRITE_REPLY;
if (cl.write_op->op_type == OSD_OP_IN)
{
// Measure execution latency
timespec tv_end;
clock_gettime(CLOCK_REALTIME, &tv_end);
stats.op_stat_count[cl.write_op->req.hdr.opcode]++;
if (!stats.op_stat_count[cl.write_op->req.hdr.opcode])
{
stats.op_stat_count[cl.write_op->req.hdr.opcode]++;
stats.op_stat_sum[cl.write_op->req.hdr.opcode] = 0;
stats.op_stat_bytes[cl.write_op->req.hdr.opcode] = 0;
}
stats.op_stat_sum[cl.write_op->req.hdr.opcode] += (
(tv_end.tv_sec - cl.write_op->tv_begin.tv_sec)*1000000 +
(tv_end.tv_nsec - cl.write_op->tv_begin.tv_nsec)/1000
);
if (cl.write_op->req.hdr.opcode == OSD_OP_READ ||
cl.write_op->req.hdr.opcode == OSD_OP_WRITE)
{
stats.op_stat_bytes[cl.write_op->req.hdr.opcode] += cl.write_op->req.rw.len;
}
else if (cl.write_op->req.hdr.opcode == OSD_OP_SECONDARY_READ ||
cl.write_op->req.hdr.opcode == OSD_OP_SECONDARY_WRITE)
{
stats.op_stat_bytes[cl.write_op->req.hdr.opcode] += cl.write_op->req.sec_rw.len;
}
}
}
cl.write_msg.msg_iov = cl.write_op->send_list.get_iovec();
cl.write_msg.msg_iovlen = cl.write_op->send_list.get_size();
data->callback = [this, peer_fd](ring_data_t *data) { handle_send(data, peer_fd); };
my_uring_prep_sendmsg(sqe, peer_fd, &cl.write_msg, 0);
return true;
}
void cluster_client_t::send_replies()
{
for (int i = 0; i < write_ready_clients.size(); i++)
{
int peer_fd = write_ready_clients[i];
if (!try_send(clients[peer_fd]))
{
write_ready_clients.erase(write_ready_clients.begin(), write_ready_clients.begin() + i);
return;
}
}
write_ready_clients.clear();
}
void cluster_client_t::handle_send(ring_data_t *data, int peer_fd)
{
auto cl_it = clients.find(peer_fd);
if (cl_it != clients.end())
{
auto & cl = cl_it->second;
if (data->res < 0 && data->res != -EAGAIN)
{
// this is a client socket, so don't panic. just disconnect it
printf("Client %d socket write error: %d (%s). Disconnecting client\n", peer_fd, -data->res, strerror(-data->res));
stop_client(peer_fd);
return;
}
if (data->res >= 0)
{
osd_op_t *cur_op = cl.write_op;
while (data->res > 0 && cur_op->send_list.sent < cur_op->send_list.count)
{
iovec & iov = cur_op->send_list.buf[cur_op->send_list.sent];
if (iov.iov_len <= data->res)
{
data->res -= iov.iov_len;
cur_op->send_list.sent++;
}
else
{
iov.iov_len -= data->res;
iov.iov_base += data->res;
break;
}
}
if (cur_op->send_list.sent >= cur_op->send_list.count)
{
// Done
if (cur_op->op_type == OSD_OP_IN)
{
delete cur_op;
}
else
{
cl.sent_ops[cl.write_op->req.hdr.id] = cl.write_op;
}
cl.write_op = NULL;
cl.write_state = cl.outbox.size() > 0 ? CL_WRITE_READY : 0;
}
}
if (cl.write_state != 0)
{
write_ready_clients.push_back(peer_fd);
}
}
}

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 (see README.md for details)
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
@ -22,8 +19,6 @@
int connect_osd(const char *osd_address, int osd_port);
uint64_t test_read(int connect_fd, uint64_t inode, uint64_t stripe, uint64_t version, uint64_t offset, uint64_t len);
uint64_t test_write(int connect_fd, uint64_t inode, uint64_t stripe, uint64_t version, uint64_t pattern);
void* test_primary_read(int connect_fd, uint64_t inode, uint64_t offset, uint64_t len);
@ -110,7 +105,7 @@ int main3(int narg, char *args[])
return 0;
}
int main4(int narg, char *args[])
int main(int narg, char *args[])
{
int connect_fd;
// Cluster write (sync not implemented yet)
@ -122,15 +117,6 @@ int main4(int narg, char *args[])
return 0;
}
int main(int narg, char *args[])
{
int connect_fd;
connect_fd = connect_osd("192.168.7.2", 43051);
test_read(connect_fd, 1, 1039663104, UINT64_MAX, 0, 128*1024);
close(connect_fd);
return 0;
}
int connect_osd(const char *osd_address, int osd_port)
{
struct sockaddr_in addr;
@ -181,73 +167,13 @@ bool check_reply(int r, osd_any_op_t & op, osd_any_reply_t & reply, int expected
return true;
}
uint64_t test_read(int connect_fd, uint64_t inode, uint64_t stripe, uint64_t version, uint64_t offset, uint64_t len)
{
osd_any_op_t op;
osd_any_reply_t reply;
op.hdr.magic = SECONDARY_OSD_OP_MAGIC;
op.hdr.id = 1;
op.hdr.opcode = OSD_OP_SEC_READ;
op.sec_rw.oid = {
.inode = inode,
.stripe = stripe,
};
op.sec_rw.version = version;
op.sec_rw.offset = offset;
op.sec_rw.len = len;
void *data = memalign(MEM_ALIGNMENT, op.sec_rw.len);
write_blocking(connect_fd, op.buf, OSD_PACKET_SIZE);
int r = read_blocking(connect_fd, reply.buf, OSD_PACKET_SIZE);
if (!check_reply(r, op, reply, op.sec_rw.len))
{
free(data);
return 0;
}
r = read_blocking(connect_fd, data, len);
if (r != len)
{
free(data);
perror("read data");
return 0;
}
free(data);
printf("Read %lx:%lx v%lu = v%lu\n", inode, stripe, version, reply.sec_rw.version);
op.hdr.opcode = OSD_OP_SEC_LIST;
op.sec_list.list_pg = 1;
op.sec_list.pg_count = 1;
op.sec_list.pg_stripe_size = 4*1024*1024;
write_blocking(connect_fd, op.buf, OSD_PACKET_SIZE);
r = read_blocking(connect_fd, reply.buf, OSD_PACKET_SIZE);
if (reply.hdr.retval < 0 || !check_reply(r, op, reply, reply.hdr.retval))
{
return 0;
}
data = memalign(MEM_ALIGNMENT, sizeof(obj_ver_id)*reply.hdr.retval);
r = read_blocking(connect_fd, data, sizeof(obj_ver_id)*reply.hdr.retval);
if (r != sizeof(obj_ver_id)*reply.hdr.retval)
{
free(data);
perror("read data");
return 0;
}
obj_ver_id *ov = (obj_ver_id*)data;
for (int i = 0; i < reply.hdr.retval; i++)
{
if (ov[i].oid.inode == inode && (ov[i].oid.stripe & ~(4096-1)) == (stripe & ~(4096-1)))
{
printf("list: %lx:%lx v%lu stable=%d\n", ov[i].oid.inode, ov[i].oid.stripe, ov[i].version, i < reply.sec_list.stable_count ? 1 : 0);
}
}
return 0;
}
uint64_t test_write(int connect_fd, uint64_t inode, uint64_t stripe, uint64_t version, uint64_t pattern)
{
osd_any_op_t op;
osd_any_reply_t reply;
op.hdr.magic = SECONDARY_OSD_OP_MAGIC;
op.hdr.id = 1;
op.hdr.opcode = OSD_OP_SEC_WRITE;
op.hdr.opcode = OSD_OP_SECONDARY_WRITE;
op.sec_rw.oid = {
.inode = inode,
.stripe = stripe,
@ -357,7 +283,7 @@ void test_list_stab(int connect_fd)
osd_any_reply_t reply;
op.hdr.magic = SECONDARY_OSD_OP_MAGIC;
op.hdr.id = 1;
op.hdr.opcode = OSD_OP_SEC_LIST;
op.hdr.opcode = OSD_OP_SECONDARY_LIST;
op.sec_list.pg_count = 0;
assert(write_blocking(connect_fd, op.buf, OSD_PACKET_SIZE) == OSD_PACKET_SIZE);
int r = read_blocking(connect_fd, reply.buf, OSD_PACKET_SIZE);
@ -373,7 +299,7 @@ void test_list_stab(int connect_fd)
// Stabilize in portions of 32 entries
if (i - last_start >= 32 || i == total_count)
{
op.hdr.opcode = OSD_OP_SEC_STABILIZE;
op.hdr.opcode = OSD_OP_SECONDARY_STABILIZE;
op.sec_stab.len = sizeof(obj_ver_id) * (i - last_start);
assert(write_blocking(connect_fd, op.buf, OSD_PACKET_SIZE) == OSD_PACKET_SIZE);
assert(write_blocking(connect_fd, data + last_start, op.sec_stab.len) == op.sec_stab.len);

View File

@ -1,11 +1,8 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
#include "pg_states.h"
const int pg_state_bit_count = 14;
const int pg_state_bit_count = 13;
const int pg_state_bits[14] = {
const int pg_state_bits[13] = {
PG_STARTING,
PG_PEERING,
PG_INCOMPLETE,
@ -17,11 +14,10 @@ const int pg_state_bits[14] = {
PG_HAS_DEGRADED,
PG_HAS_MISPLACED,
PG_HAS_UNCLEAN,
PG_HAS_INVALID,
PG_LEFT_ON_DEAD,
};
const char *pg_state_names[14] = {
const char *pg_state_names[13] = {
"starting",
"peering",
"incomplete",
@ -33,6 +29,5 @@ const char *pg_state_names[14] = {
"has_degraded",
"has_misplaced",
"has_unclean",
"has_invalid",
"left_on_dead",
};

View File

@ -1,6 +1,3 @@
// Copyright (c) Vitaliy Filippov, 2019+
// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
#pragma once
// Placement group states
@ -18,11 +15,9 @@
#define PG_HAS_DEGRADED (1<<8)
#define PG_HAS_MISPLACED (1<<9)
#define PG_HAS_UNCLEAN (1<<10)
#define PG_HAS_INVALID (1<<11)
#define PG_LEFT_ON_DEAD (1<<12)
#define PG_LEFT_ON_DEAD (1<<11)
// Lower bits that represent object role (EC 0/1/2... or always 0 with replication)
// 12 bits is a safe default that doesn't depend on pg_stripe_size or pg_block_size
// FIXME: Safe default that doesn't depend on pg_stripe_size or pg_block_size
#define STRIPE_MASK ((uint64_t)4096 - 1)
// OSD object states
@ -31,6 +26,7 @@
#define OBJ_MISPLACED 0x08
#define OBJ_NEEDS_STABLE 0x10000
#define OBJ_NEEDS_ROLLBACK 0x20000
#define OBJ_BUGGY 0x80000
extern const int pg_state_bits[];
extern const char *pg_state_names[];

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