Release 0.5.5

- Transition to CMake build system - Fix Monitor being unable to change PG sizes - Fix PG optimizer not using some OSDs in some cases - Fix inability to change PG count online - Improve journal flusher performance - Add a little better systemd unit generator - Use w=8 with jerasure (breaking change for EC pools)
Make OSDs with 256 flushers (as they are now dynamic)
2021-02-26 01:59:18 +03:00 · 2021-02-26 01:59:18 +03:00 · 2021-02-26 01:59:18 +03:00 · 2021-02-26 01:59:18 +03:00 · 2021-02-26 00:28:57 +03:00 · 2021-02-25 23:59:34 +03:00
128 changed files with 1714 additions and 920 deletions
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,5 +1,6 @@
 .git
 build
+packages
 mon/node_modules
 *.o
 *.so
@@ -15,3 +16,4 @@ fio
 qemu
 rpm/*.Dockerfile
 debian/*.Dockerfile
+Dockerfile
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 2.8)
+
+project(vitastor)
+
+add_subdirectory(src)
--- a/Make-gen.pl
+++ b/Make-gen.pl
@@ -1,46 +0,0 @@
-#!/usr/bin/perl
-
-use strict;
-
-my $deps = {};
-for my $line (split /\n/, `grep '^#include "' *.cpp *.h`)
-{
-    if ($line =~ /^([^:]+):\#include "([^"]+)"/s)
-    {
-        $deps->{$1}->{$2} = 1;
-    }
-}
-
-my $added;
-do
-{
-    $added = 0;
-    for my $file (keys %$deps)
-    {
-        for my $dep (keys %{$deps->{$file}})
-        {
-            if ($deps->{$dep})
-            {
-                for my $subdep (keys %{$deps->{$dep}})
-                {
-                    if (!$deps->{$file}->{$subdep})
-                    {
-                        $added = 1;
-                        $deps->{$file}->{$subdep} = 1;
-                    }
-                }
-            }
-        }
-    }
-} while ($added);
-
-for my $file (sort keys %$deps)
-{
-    if ($file =~ /\.cpp$/)
-    {
-        my $obj = $file;
-        $obj =~ s/\.cpp$/.o/s;
-        print "$obj: $file ".join(" ", sort keys %{$deps->{$file}})."\n";
-        print "\tg++ \$(CXXFLAGS) -c -o \$\@ \$\<\n";
-    }
-}
--- a/195
+++ b/195
@@ -1,195 +0,0 @@
-BINDIR ?= /usr/bin
-LIBDIR ?= /usr/lib/x86_64-linux-gnu
-QEMU_PLUGINDIR ?= /usr/lib/x86_64-linux-gnu/qemu
-
-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 -I/usr/include/jerasure
-all: libfio_blockstore.so osd libfio_sec_osd.so libfio_cluster.so stub_osd stub_uring_osd stub_bench osd_test dump_journal qemu_driver.so nbd_proxy rm_inode
-clean:
-	rm -f *.o libblockstore.so libfio_blockstore.so osd libfio_sec_osd.so libfio_cluster.so stub_osd stub_uring_osd stub_bench osd_test dump_journal qemu_driver.so nbd_proxy rm_inode
-
-install: all
-	mkdir -p $(DESTDIR)$(LIBDIR)/vitastor
-	install -m 0755 libfio_sec_osd.so $(DESTDIR)$(LIBDIR)/vitastor/
-	install -m 0755 libfio_cluster.so $(DESTDIR)$(LIBDIR)/vitastor/
-	install -m 0755 libfio_blockstore.so $(DESTDIR)$(LIBDIR)/vitastor/
-	install -m 0755 libblockstore.so $(DESTDIR)$(LIBDIR)/vitastor/
-	mkdir -p $(DESTDIR)$(BINDIR)
-	install -m 0755 osd $(DESTDIR)$(BINDIR)/vitastor-osd
-	install -m 0755 dump_journal $(DESTDIR)$(BINDIR)/vitastor-dump-journal
-	install -m 0755 nbd_proxy $(DESTDIR)$(BINDIR)/vitastor-nbd
-	install -m 0755 rm_inode $(DESTDIR)$(BINDIR)/vitastor-rm
-	mkdir -p $(DESTDIR)$(QEMU_PLUGINDIR)
-	install -m 0755 qemu_driver.so $(DESTDIR)$(QEMU_PLUGINDIR)/block-vitastor.so
-
-dump_journal: dump_journal.cpp crc32c.o blockstore_journal.h
-	g++ $(CXXFLAGS) -o $@ $< crc32c.o
-
-libblockstore.so: $(BLOCKSTORE_OBJS)
-	g++ $(CXXFLAGS) -o $@ -shared $(BLOCKSTORE_OBJS) -ltcmalloc_minimal -luring
-libfio_blockstore.so: ./libblockstore.so fio_engine.o json11.o
-	g++ $(CXXFLAGS) -Wl,-rpath,'$(LIBDIR)/vitastor',-rpath,'$$ORIGIN' -shared -o $@ fio_engine.o json11.o libblockstore.so -ltcmalloc_minimal -luring
-
-OSD_OBJS := osd.o osd_secondary.o msgr_receive.o msgr_send.o osd_peering.o osd_flush.o osd_peering_pg.o \
-	osd_primary.o osd_primary_subops.o etcd_state_client.o messenger.o osd_cluster.o http_client.o osd_ops.o pg_states.o \
-	osd_rmw.o json11.o base64.o timerfd_manager.o epoll_manager.o
-osd: ./libblockstore.so osd_main.cpp osd.h osd_ops.h $(OSD_OBJS)
-	g++ $(CXXFLAGS) -Wl,-rpath,'$(LIBDIR)/vitastor',-rpath,'$$ORIGIN' -o $@ osd_main.cpp $(OSD_OBJS) libblockstore.so -ltcmalloc_minimal -luring -lJerasure
-
-stub_osd: stub_osd.o rw_blocking.o
-	g++ $(CXXFLAGS) -o $@ stub_osd.o rw_blocking.o -ltcmalloc_minimal
-
-osd_rmw_test: osd_rmw_test.o
-	g++ $(CXXFLAGS) -o $@ osd_rmw_test.o -lJerasure -fsanitize=address
-
-STUB_URING_OSD_OBJS := stub_uring_osd.o epoll_manager.o messenger.o msgr_send.o msgr_receive.o ringloop.o timerfd_manager.o json11.o
-stub_uring_osd: $(STUB_URING_OSD_OBJS)
-	g++ $(CXXFLAGS) -o $@ -ltcmalloc_minimal $(STUB_URING_OSD_OBJS) -luring
-stub_bench: stub_bench.cpp osd_ops.h rw_blocking.o
-	g++ $(CXXFLAGS) -o $@ stub_bench.cpp rw_blocking.o -ltcmalloc_minimal
-osd_test: osd_test.cpp osd_ops.h rw_blocking.o
-	g++ $(CXXFLAGS) -o $@ 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.o rw_blocking.o
-	g++ $(CXXFLAGS) -ltcmalloc_minimal -shared -o $@ fio_sec_osd.o rw_blocking.o
-
-FIO_CLUSTER_OBJS := cluster_client.o epoll_manager.o etcd_state_client.o \
-	messenger.o msgr_send.o msgr_receive.o ringloop.o json11.o http_client.o osd_ops.o pg_states.o timerfd_manager.o base64.o
-libfio_cluster.so: fio_cluster.o $(FIO_CLUSTER_OBJS)
-	g++ $(CXXFLAGS) -ltcmalloc_minimal -shared -o $@ $< $(FIO_CLUSTER_OBJS) -luring
-
-nbd_proxy: nbd_proxy.o $(FIO_CLUSTER_OBJS)
-	g++ $(CXXFLAGS) -ltcmalloc_minimal -o $@ $< $(FIO_CLUSTER_OBJS) -luring
-
-rm_inode: rm_inode.o $(FIO_CLUSTER_OBJS)
-	g++ $(CXXFLAGS) -ltcmalloc_minimal -o $@ $< $(FIO_CLUSTER_OBJS) -luring
-
-qemu_driver.o: qemu_driver.c qemu_proxy.h
-	gcc -I qemu/b/qemu `pkg-config glib-2.0 --cflags` \
-		-I qemu/include $(CXXFLAGS) -c -o $@ $<
-
-qemu_driver.so: qemu_driver.o qemu_proxy.o $(FIO_CLUSTER_OBJS)
-	g++ $(CXXFLAGS) -ltcmalloc_minimal -shared -o $@ $(FIO_CLUSTER_OBJS) qemu_driver.o qemu_proxy.o -luring
-
-test_blockstore: ./libblockstore.so test_blockstore.cpp timerfd_interval.o
-	g++ $(CXXFLAGS) -Wl,-rpath,'$(LIBDIR)/vitastor',-rpath,'$$ORIGIN' -o test_blockstore test_blockstore.cpp timerfd_interval.o libblockstore.so -ltcmalloc_minimal -luring
-test_shit: test_shit.cpp osd_peering_pg.o
-	g++ $(CXXFLAGS) -o test_shit test_shit.cpp -luring -lm
-test_allocator: test_allocator.cpp allocator.o
-	g++ $(CXXFLAGS) -o test_allocator test_allocator.cpp allocator.o
-
-crc32c.o: crc32c.c crc32c.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-json11.o: json11/json11.cpp
-	g++ $(CXXFLAGS) -c -o json11.o json11/json11.cpp
-
-# Autogenerated
-
-allocator.o: allocator.cpp allocator.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-base64.o: base64.cpp base64.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-blockstore.o: blockstore.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-blockstore_flush.o: blockstore_flush.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-blockstore_impl.o: blockstore_impl.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-blockstore_init.o: blockstore_init.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-blockstore_journal.o: blockstore_journal.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-blockstore_open.o: blockstore_open.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-blockstore_read.o: blockstore_read.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-blockstore_rollback.o: blockstore_rollback.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-blockstore_stable.o: blockstore_stable.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-blockstore_sync.o: blockstore_sync.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-blockstore_write.o: blockstore_write.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-cluster_client.o: cluster_client.cpp cluster_client.h etcd_state_client.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-dump_journal.o: dump_journal.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-epoll_manager.o: epoll_manager.cpp epoll_manager.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-etcd_state_client.o: etcd_state_client.cpp base64.h etcd_state_client.h http_client.h json11/json11.hpp object_id.h osd_id.h osd_ops.h pg_states.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-fio_cluster.o: fio_cluster.cpp cluster_client.h epoll_manager.h etcd_state_client.h fio/arch/arch.h fio/fio.h fio/optgroup.h fio_headers.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-fio_engine.o: fio_engine.cpp blockstore.h fio/arch/arch.h fio/fio.h fio/optgroup.h fio_headers.h json11/json11.hpp object_id.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-fio_sec_osd.o: fio_sec_osd.cpp fio/arch/arch.h fio/fio.h fio/optgroup.h fio_headers.h object_id.h osd_id.h osd_ops.h rw_blocking.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-http_client.o: http_client.cpp http_client.h json11/json11.hpp timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-messenger.o: messenger.cpp json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-msgr_receive.o: msgr_receive.cpp json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-msgr_send.o: msgr_send.cpp json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-nbd_proxy.o: nbd_proxy.cpp cluster_client.h epoll_manager.h etcd_state_client.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd.o: osd.cpp blockstore.h cpp-btree/btree_map.h epoll_manager.h etcd_state_client.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_cluster.o: osd_cluster.cpp base64.h blockstore.h cpp-btree/btree_map.h epoll_manager.h etcd_state_client.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_flush.o: osd_flush.cpp blockstore.h cpp-btree/btree_map.h epoll_manager.h etcd_state_client.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_main.o: osd_main.cpp blockstore.h cpp-btree/btree_map.h epoll_manager.h etcd_state_client.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_ops.o: osd_ops.cpp object_id.h osd_id.h osd_ops.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_peering.o: osd_peering.cpp base64.h blockstore.h cpp-btree/btree_map.h epoll_manager.h etcd_state_client.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_peering_pg.o: osd_peering_pg.cpp cpp-btree/btree_map.h object_id.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_peering_pg_test.o: osd_peering_pg_test.cpp cpp-btree/btree_map.h object_id.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_primary.o: osd_primary.cpp blockstore.h cpp-btree/btree_map.h epoll_manager.h etcd_state_client.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h osd_primary.h osd_rmw.h pg_states.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_primary_subops.o: osd_primary_subops.cpp blockstore.h cpp-btree/btree_map.h epoll_manager.h etcd_state_client.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h osd_primary.h osd_rmw.h pg_states.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_rmw.o: osd_rmw.cpp malloc_or_die.h object_id.h osd_id.h osd_rmw.h xor.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_rmw_test.o: osd_rmw_test.cpp malloc_or_die.h object_id.h osd_id.h osd_rmw.cpp osd_rmw.h test_pattern.h xor.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_secondary.o: osd_secondary.cpp blockstore.h cpp-btree/btree_map.h epoll_manager.h etcd_state_client.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-osd_test.o: osd_test.cpp object_id.h osd_id.h osd_ops.h rw_blocking.h test_pattern.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-pg_states.o: pg_states.cpp pg_states.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-qemu_proxy.o: qemu_proxy.cpp cluster_client.h etcd_state_client.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd_id.h osd_ops.h qemu_proxy.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-ringloop.o: ringloop.cpp ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-rm_inode.o: rm_inode.cpp cluster_client.h etcd_state_client.h http_client.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-rw_blocking.o: rw_blocking.cpp rw_blocking.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-stub_bench.o: stub_bench.cpp object_id.h osd_id.h osd_ops.h rw_blocking.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-stub_osd.o: stub_osd.cpp object_id.h osd_id.h osd_ops.h rw_blocking.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-stub_uring_osd.o: stub_uring_osd.cpp epoll_manager.h json11/json11.hpp malloc_or_die.h messenger.h object_id.h osd_id.h osd_ops.h ringloop.h timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-test_allocator.o: test_allocator.cpp allocator.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-test_blockstore.o: test_blockstore.cpp blockstore.h object_id.h ringloop.h timerfd_interval.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-test_shit.o: test_shit.cpp allocator.h blockstore.h blockstore_flush.h blockstore_impl.h blockstore_init.h blockstore_journal.h cpp-btree/btree_map.h crc32c.h malloc_or_die.h object_id.h osd_id.h osd_ops.h osd_peering_pg.h pg_states.h ringloop.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-timerfd_interval.o: timerfd_interval.cpp ringloop.h timerfd_interval.h
-	g++ $(CXXFLAGS) -c -o $@ $<
-timerfd_manager.o: timerfd_manager.cpp timerfd_manager.h
-	g++ $(CXXFLAGS) -c -o $@ $<
--- a/README.md
+++ b/README.md
@@ -16,7 +16,8 @@ breaking changes in the future. However, the following is implemented:

 - Basic part: highly-available block storage with symmetric clustering and no SPOF
 - Performance ;-D
- Two redundancy schemes: Replication and XOR n+1 (simplest case of EC)
+- 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
@@ -39,8 +40,6 @@ breaking changes in the future. However, the following is implemented:
 - OSD creation tool (OSDs currently have to be created by hand)
 - Other administrative tools
 - Per-inode I/O and space usage statistics
- jerasure EC support with any number of data and parity drives in a group
- Parallel usage of multiple network interfaces
 - Proxmox and OpenNebula plugins
 - iSCSI proxy
 - Inode metadata storage in etcd
@@ -50,6 +49,7 @@ breaking changes in the future. However, the following is implemented:
 - 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)

@@ -336,9 +336,8 @@ Vitastor with single-thread NBD on the same hardware:
 - 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 Vitastor with `make -j8`.
- Run `make install` (optionally with `LIBDIR=/usr/lib64 QEMU_PLUGINDIR=/usr/lib64/qemu-kvm`
-  if you're using an RPM-based distro).
+- 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

@@ -349,20 +348,16 @@ and calculate disk offsets almost by hand. This will be fixed in near future.
  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`.
- Start etcd with `--max-txn-ops=100000 --auto-compaction-retention=10 --auto-compaction-mode=revision` options.
- 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"}}'`.
- Calculate offsets for your drives with `node /usr/lib/vitastor/mon/simple-offsets.js --device /dev/sdX`.
- Make systemd units for your OSDs. Look at `/usr/lib/vitastor/mon/make-units.sh` for example.
-  Notable configuration variables from the example:
+- 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 16` - flusher is a micro-thread that removes old data from the journal.
-    More flushers mean more aggressive journal flushing which allows for more throughput
-    but slightly hurts latency under less load. Flushing will probably be improved in the future
-    because currently high queue depths sometimes lead to performance degradation.
+  - `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.
@@ -373,18 +368,22 @@ and calculate disk offsets almost by hand. This will be fixed in near future.
    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.
- Start any number of monitors: `node /usr/lib/vitastor/mon/mon-main.js --etcd_url 'http://10.115.0.10:2379,http://10.115.0.11:2379,http://10.115.0.12:2379,http://10.115.0.13:2379' --etcd_prefix '/vitastor' --etcd_start_timeout 5`.
+- 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=/usr/lib/x86_64-linux-gnu/vitastor/libfio_cluster.so -name=test -bs=4M -direct=1 -iodepth=16 -rw=write -etcd=10.115.0.10:2379/v3 -pool=1 -inode=1 -size=400G`.
+- 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):
  ```
-  LD_PRELOAD=/usr/lib/x86_64-linux-gnu/qemu/block-vitastor.so 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'
+  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):
  ```
-  LD_PRELOAD=/usr/lib/x86_64-linux-gnu/qemu/block-vitastor.so qemu-system-x86_64 -enable-kvm -m 1024
+  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
@@ -398,10 +397,7 @@ and calculate disk offsets almost by hand. This will be fixed in near future.

 - Object deletion requests may currently lead to 'incomplete' objects 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. Inode removal tool currently can't handle unclean
-  objects, so incomplete objects become undeletable. This will be fixed in near future
-  by allowing the inode removal tool to delete unclean objects. With this problem fixed
-  you'll be able just to repeat the removal again.
+  and it's currently not implemented. Just to repeat the removal again in this case.

 ## Implementation Principles

@@ -423,22 +419,27 @@ Copyright (c) Vitaliy Filippov (vitalif [at] yourcmc.ru), 2019+
 You can also find me in the Russian Telegram Ceph chat: https://t.me/ceph_ru

 All server-side code (OSD, Monitor and so on) is licensed under the terms of
-Vitastor Network Public License 1.0 (VNPL 1.0), a copyleft license based on
+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 ("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.
+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 1.0 and also GNU GPL 2.0 or later to allow for compatibility with GPLed
+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-1.0 in the file [VNPL-1.0.txt](VNPL-1.0.txt).
+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).
--- a/VNPL-1.1.txt
+++ b/VNPL-1.1.txt
@@ -1,7 +1,7 @@
                     VITASTOR NETWORK PUBLIC LICENSE
-                       Version 1, 17 September 2020
+                     Version 1.1,  6 February 2021

- Copyright (C) 2020 Vitaliy Filippov <vitalif@yourcmc.ru>
+ 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.

@@ -540,12 +540,15 @@ License would be to refrain entirely from conveying the Program.

  13. Remote Network Interaction.

-  Notwithstanding any other provision of this License, if you provide
-any user an opportunity to interact with the covered work directly
-or indirectly through a computer network, an imitation of such network,
-or an additional program (hereinafter referred to as a "Proxy Program")
-that, in turn, interacts with the covered work through a computer network,
-an imitation of such network, or another Proxy Program itself,
+  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
 network server at no charge, through some standard or customary means of
--- a/copy-fio-includes.sh
+++ b/copy-fio-includes.sh
@@ -1,6 +1,6 @@
 #!/bin/bash

-gcc -E -o fio_headers.i fio_headers.h
+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
--- a/copy-qemu-includes.sh
+++ b/copy-qemu-includes.sh
@@ -5,7 +5,7 @@
 #cd b/qemu; make qapi

 gcc -I qemu/b/qemu `pkg-config glib-2.0 --cflags` \
-    -I qemu/include -E -o qemu_driver.i qemu_driver.c
+    -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
--- a/debian/build-vitastor-bullseye.sh
+++ b/debian/build-vitastor-bullseye.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+sed 's/$REL/bullseye/' < vitastor.Dockerfile > ../Dockerfile
+cd ..
+mkdir -p packages
+sudo podman build -v `pwd`/packages:/root/packages -f Dockerfile .
+rm Dockerfile
--- a/debian/build-vitastor-buster.sh
+++ b/debian/build-vitastor-buster.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+sed 's/$REL/buster/' < vitastor.Dockerfile > ../Dockerfile
+cd ..
+mkdir -p packages
+sudo podman build -v `pwd`/packages:/root/packages -f Dockerfile .
+rm Dockerfile
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+vitastor (0.5.5-1) 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
--- a/debian/control
+++ b/debian/control
@@ -9,7 +9,7 @@ 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
+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,
--- a/debian/copyright
+++ b/debian/copyright
@@ -5,16 +5,17 @@ Source: https://vitastor.io

 Files: *
 Copyright: 2019+ Vitaliy Filippov <vitalif@yourcmc.ru>
-License: Multiple licenses VNPL-1.0 and/or GPL-2.0+
+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 1.0 (VNPL 1.0), a copyleft license based on
+ 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 ("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.
+ 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 1.0 and also GNU GPL 2.0 or later to allow for compatibility with GPLed
+ VNPL 1.1 and also GNU GPL 2.0 or later to allow for compatibility with GPLed
 software like QEMU and fio.
--- a/debian/install
+++ b/debian/install
@@ -1,3 +1,3 @@
-VNPL-1.0.txt usr/share/doc/vitastor
+VNPL-1.1.txt usr/share/doc/vitastor
 GPL-2.0.txt usr/share/doc/vitastor
 mon usr/lib/vitastor
--- a/debian/patched-qemu.Dockerfile
+++ b/debian/patched-qemu.Dockerfile
@@ -1,13 +1,8 @@
 # Build patched QEMU for Debian Buster or Bullseye/Sid inside a container
-# cd ..; podman build --build-arg REL=bullseye -v `pwd`/build:/root/build -f debian/patched-qemu.Dockerfile .
-
-ARG REL=bullseye
+# cd ..; podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f debian/patched-qemu.Dockerfile .

 FROM debian:$REL

-# again, it doesn't work otherwise
-ARG REL=bullseye
-
 WORKDIR /root

 RUN if [ "$REL" = "buster" ]; then \
@@ -30,20 +25,20 @@ 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/build/qemu-$REL; \
-    rm -rf /root/build/qemu-$REL/*; \
-    cd /root/build/qemu-$REL; \
+    mkdir -p /root/packages/qemu-$REL; \
+    rm -rf /root/packages/qemu-$REL/*; \
+    cd /root/packages/qemu-$REL; \
    dpkg-source -x /root/qemu*.dsc; \
-    if [ -d /root/build/qemu-$REL/qemu-5.0 ]; then \
-        cp /root/vitastor/qemu-5.0-vitastor.patch /root/build/qemu-$REL/qemu-5.0/debian/patches; \
-        echo qemu-5.0-vitastor.patch >> /root/build/qemu-$REL/qemu-5.0/debian/patches/series; \
+    if [ -d /root/packages/qemu-$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/build/qemu-$REL/qemu-*/debian/patches; \
-        P=`ls -d /root/build/qemu-$REL/qemu-*/debian/patches`; \
+        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 >> $P/series; \
    fi; \
-    cd /root/build/qemu-$REL/qemu-*/; \
+    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 $V 'Plug Vitastor block driver'; \
    DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \
-    rm -rf /root/build/qemu-$REL/qemu-*/
+    rm -rf /root/packages/qemu-$REL/qemu-*/
--- a/debian/vitastor.Dockerfile
+++ b/debian/vitastor.Dockerfile
@@ -1,13 +1,8 @@
 # Build Vitastor packages for Debian Buster or Bullseye/Sid inside a container
-# cd ..; podman build --build-arg REL=bullseye -v `pwd`/build:/root/build -f debian/vitastor.Dockerfile .
-
-ARG REL=bullseye
+# cd ..; podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f debian/vitastor.Dockerfile .

 FROM debian:$REL

-# again, it doesn't work otherwise
-ARG REL=bullseye
-
 WORKDIR /root

 RUN if [ "$REL" = "buster" ]; then \
@@ -27,7 +22,7 @@ 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
+RUN apt-get -y install libjerasure-dev cmake

 ADD . /root/vitastor
 RUN set -e -x; \
@@ -35,20 +30,20 @@ RUN set -e -x; \
    cd /root/fio-build/; \
    rm -rf /root/fio-build/*; \
    dpkg-source -x /root/fio*.dsc; \
-    cd /root/build/qemu-$REL/; \
+    cd /root/packages/qemu-$REL/; \
    rm -rf qemu*/; \
    dpkg-source -x qemu*.dsc; \
-    cd /root/build/qemu-$REL/qemu*/; \
+    cd /root/packages/qemu-$REL/qemu*/; \
    debian/rules b/configure-stamp; \
    cd b/qemu; \
-    make -j8 qapi; \
-    mkdir -p /root/build/vitastor-$REL; \
-    rm -rf /root/build/vitastor-$REL/*; \
-    cd /root/build/vitastor-$REL; \
-    cp -r /root/vitastor vitastor-0.5.1; \
-    ln -s /root/build/qemu-$REL/qemu-*/ vitastor-0.5.1/qemu; \
-    ln -s /root/fio-build/fio-*/ vitastor-0.5.1/fio; \
-    cd vitastor-0.5.1; \
+    make -j8 qapi/qapi-builtin-types.h; \
+    mkdir -p /root/packages/vitastor-$REL; \
+    rm -rf /root/packages/vitastor-$REL/*; \
+    cd /root/packages/vitastor-$REL; \
+    cp -r /root/vitastor vitastor-0.5.5; \
+    ln -s /root/packages/qemu-$REL/qemu-*/ vitastor-0.5.5/qemu; \
+    ln -s /root/fio-build/fio-*/ vitastor-0.5.5/fio; \
+    cd vitastor-0.5.5; \
    FIO=$(head -n1 fio/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
    QEMU=$(head -n1 qemu/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
    sh copy-qemu-includes.sh; \
@@ -60,13 +55,13 @@ RUN set -e -x; \
    diff -NaurpbB a b > debian/patches/qemu-fio-headers.patch || true; \
    echo qemu-fio-headers.patch >> debian/patches/series; \
    rm -rf a b; \
-    rm -rf /root/build/qemu-$REL/qemu*/; \
+    rm -rf /root/packages/qemu-$REL/qemu*/; \
    echo "dep:fio=$FIO" > debian/substvars; \
    echo "dep:qemu=$QEMU" >> debian/substvars; \
-    cd /root/build/vitastor-$REL; \
-    tar --sort=name --mtime='2020-01-01' --owner=0 --group=0 --exclude=debian -cJf vitastor_0.5.1.orig.tar.xz vitastor-0.5.1; \
-    cd vitastor-0.5.1; \
+    cd /root/packages/vitastor-$REL; \
+    tar --sort=name --mtime='2020-01-01' --owner=0 --group=0 --exclude=debian -cJf vitastor_0.5.5.orig.tar.xz vitastor-0.5.5; \
+    cd vitastor-0.5.5; \
    V=$(head -n1 debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
    DEBFULLNAME="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v "$V""$REL" "Rebuild for $REL"; \
    DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \
-    rm -rf /root/build/vitastor-$REL/vitastor-*/
+    rm -rf /root/packages/vitastor-$REL/vitastor-*/
--- a/lambda_size.cpp
+++ b/lambda_size.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include <iostream>
 #include <functional>
--- a/mon/PGUtil.js
+++ b/mon/PGUtil.js
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 module.exports = {
    scale_pg_count,
@@ -8,7 +8,7 @@ module.exports = {
 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 into the history of new PGs
+    // 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 the old PG count
@@ -16,7 +16,7 @@ function scale_pg_count(prev_pgs, prev_pg_history, new_pg_history, new_pg_count)
        for (let i = 0; i < new_pg_count; i++)
        {
            const old_i = Math.floor(new_pg_count / mul);
-            new_pg_history[i] = JSON.parse(JSON.stringify(prev_pg_history[1+old_i]));
+            new_pg_history[i] = prev_pg_history[old_i] ? JSON.parse(JSON.stringify(prev_pg_history[old_i])) : undefined;
        }
    }
    else if (!(old_pg_count % new_pg_count))
--- a/mon/afr.js
+++ b/mon/afr.js
@@ -1,31 +1,16 @@
 // 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-1.0 (see README.md for details)
-
-const { sprintf } = require('sprintf-js');
+// 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,
-    print_cluster_afr,
    c_n_k,
 };

-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, 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, capacity: 4000, speed: 0.1, ec: [ 2, 1 ] });
-print_cluster_afr({ n_hosts: 4, n_drives: 3, afr_drive: 0.03, afr_host: 0.05, capacity: 4000, speed: 0.1, ec: [ 2, 1 ] });
-print_cluster_afr({ n_hosts: 10, n_drives: 10, afr_drive: 0.1, 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, 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, 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 });
-
 /******** "FULL MESH": ASSUME EACH OSD COMMUNICATES WITH ALL OTHER OSDS ********/

 // Estimate AFR of the cluster
@@ -56,93 +41,38 @@ function failure_rate_fullmesh(n, a, f)
 /******** 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
+// <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.
+// 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_pgs({ n_hosts, n_drives, afr_drive, capacity, speed, replicas, pgs = 1, degraded_replacement })
+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 })
 {
-    pgs = Math.min(pgs, (n_hosts-1)*n_drives/(replicas-1));
-    const l = capacity/(degraded_replacement ? 1 : pgs)/speed/86400/365;
-    return 1 - (1 - afr_drive * (1-(1-(afr_drive*l)**(replicas-1))**pgs)) ** (n_hosts*n_drives);
-}
-
-function cluster_afr_pgs_ec({ n_hosts, n_drives, afr_drive, capacity, speed, ec: [ ec_data, ec_parity ], pgs = 1, degraded_replacement })
-{
-    const ec_total = ec_data+ec_parity;
-    pgs = Math.min(pgs, (n_hosts-1)*n_drives/(ec_total-1));
-    const l = capacity/(degraded_replacement ? 1 : pgs)/speed/86400/365;
-    return 1 - (1 - afr_drive * (1-(1-failure_rate_fullmesh(ec_total-1, afr_drive*l, ec_parity))**pgs)) ** (n_hosts*n_drives);
-}
-
-// Same as above, but also take server failures into account
-function cluster_afr_pgs_hosts({ n_hosts, n_drives, afr_drive, afr_host, capacity, speed, replicas, pgs = 1, degraded_replacement })
-{
-    let otherhosts = Math.min(pgs, (n_hosts-1)/(replicas-1));
-    pgs = Math.min(pgs, (n_hosts-1)*n_drives/(replicas-1));
-    let pgh = Math.min(pgs*n_drives, (n_hosts-1)*n_drives/(replicas-1));
-    const ld = capacity/(degraded_replacement ? 1 : pgs)/speed/86400/365;
-    const lh = n_drives*capacity/pgs/speed/86400/365;
-    const p1 = ((afr_drive+afr_host*pgs/otherhosts)*lh);
-    const p2 = ((afr_drive+afr_host*pgs/otherhosts)*ld);
-    return 1 - ((1 - afr_host * (1-(1-p1**(replicas-1))**pgh)) ** n_hosts) *
-        ((1 - afr_drive * (1-(1-p2**(replicas-1))**pgs)) ** (n_hosts*n_drives));
-}
-
-function cluster_afr_pgs_ec_hosts({ n_hosts, n_drives, afr_drive, afr_host, capacity, speed, ec: [ ec_data, ec_parity ], pgs = 1, degraded_replacement })
-{
-    const ec_total = ec_data+ec_parity;
-    const otherhosts = Math.min(pgs, (n_hosts-1)/(ec_total-1));
-    pgs = Math.min(pgs, (n_hosts-1)*n_drives/(ec_total-1));
-    const pgh = Math.min(pgs*n_drives, (n_hosts-1)*n_drives/(ec_total-1));
-    const ld = capacity/(degraded_replacement ? 1 : pgs)/speed/86400/365;
-    const lh = n_drives*capacity/pgs/speed/86400/365;
-    const p1 = ((afr_drive+afr_host*pgs/otherhosts)*lh);
-    const p2 = ((afr_drive+afr_host*pgs/otherhosts)*ld);
-    return 1 - ((1 - afr_host * (1-(1-failure_rate_fullmesh(ec_total-1, p1, ec_parity))**pgh)) ** n_hosts) *
-        ((1 - afr_drive * (1-(1-failure_rate_fullmesh(ec_total-1, p2, ec_parity))**pgs)) ** (n_hosts*n_drives));
-}
-
-// Wrapper for 4 above functions
-function cluster_afr(config)
-{
-    if (config.ec && config.afr_host)
-    {
-        return cluster_afr_pgs_ec_hosts(config);
-    }
-    else if (config.ec)
-    {
-        return cluster_afr_pgs_ec(config);
-    }
-    else if (config.afr_host)
-    {
-        return cluster_afr_pgs_hosts(config);
-    }
-    else
-    {
-        return cluster_afr_pgs(config);
-    }
-}
-
-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 ${config.ec[0]}+${config.ec[1]}` : `, ${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');
+    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 ********/
--- a/mon/afr_test.js
+++ b/mon/afr_test.js
@@ -0,0 +1,28 @@
+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');
+}
--- a/mon/lp-optimizer.js
+++ b/mon/lp-optimizer.js
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 // Data distribution optimizer using linear programming (lp_solve)

@@ -58,7 +58,7 @@ async function optimize_initial({ osd_tree, pg_count, pg_size = 3, pg_minsize =
    }
    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));
+    const all_pgs = Object.values(random_combinations(osd_tree, pg_size, max_combinations, parity_space > 1));
    const pg_per_osd = {};
    for (const pg of all_pgs)
    {
@@ -249,7 +249,7 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
        }
    }
    // Get all combinations
-    let all_pgs = random_combinations(osd_tree, pg_size, max_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);
    const pg_per_osd = {};
@@ -275,6 +275,11 @@ async function optimize_change({ prev_pgs: prev_int_pgs, osd_tree, pg_size = 3,
    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}`
    )).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)
@@ -488,7 +493,8 @@ function extract_osds(osd_tree, levels, osd_level, osds = {})
    return osds;
 }

-function random_combinations(osd_tree, pg_size, count)
+// 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 = () =>
@@ -516,25 +522,47 @@ function random_combinations(osd_tree, pg_size, count)
                pg.push(osds[cur_hosts[next_host]][next_osd]);
                cur_hosts.splice(next_host, 1);
            }
-            while (pg.length < pg_size)
+            const cyclic_pgs = [ pg ];
+            if (ordered)
            {
-                pg.push(NO_OSD);
+                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;
            }
-            r['pg_'+pg.join('_')] = pg;
        }
    }
    // Generate purely random combinations
-    restart: while (count > 0)
+    while (count > 0)
    {
        let host_idx = [];
-        for (let i = 0; i < pg_size && i < hosts.length; i++)
+        const cur_hosts = [ ...hosts.map((h, i) => i) ];
+        const max_hosts = pg_size < hosts.length ? pg_size : hosts.length;
+        if (ordered)
        {
-            let start = i > 0 ? host_idx[i-1]+1 : 0;
-            if (start >= hosts.length)
+            for (let i = 0; i < max_hosts; i++)
            {
-                continue restart;
+                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);
            }
-            host_idx[i] = start + rng() % (hosts.length-start);
        }
        let pg = host_idx.map(h => osds[hosts[h]][rng() % osds[hosts[h]].length]);
        while (pg.length < pg_size)
--- a/mon/make-osd.sh
+++ b/mon/make-osd.sh
@@ -0,0 +1,76 @@
+#!/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
--- a/mon/make-units.sh
+++ b/mon/make-units.sh
@@ -1,19 +1,25 @@
 #!/bin/bash
-# Example startup script generator
-# Of course this isn't a production solution yet, this is just for tests
+# 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

-IP=`ip -json a s | jq -r '.[].addr_info[] | select(.broadcast == "10.115.0.255") | .local'`
+# 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)

-BASE=${IP/*./}
-BASE=$((BASE-10))
-
+# etcd
 useradd etcd

-mkdir -p /var/lib/etcd$BASE.etcd
+mkdir -p /var/lib/etcd$ETCD_NUM.etcd
 cat >/etc/systemd/system/etcd.service <<EOF
 [Unit]
 Description=etcd for vitastor
@@ -22,19 +28,18 @@ Wants=network-online.target local-fs.target time-sync.target

 [Service]
 Restart=always
-ExecStart=/usr/local/bin/etcd -name etcd$BASE --data-dir /var/lib/etcd$BASE.etcd \\
+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 etcd0=http://10.115.0.10:2380,etcd1=http://10.115.0.11:2380,etcd2=http://10.115.0.12:2380,etcd3=http://10.115.0.13:2380 \\
+    --initial-cluster-token vitastor-etcd-1 --initial-cluster $ETCD_HOSTS \\
    --initial-cluster-state new --max-txn-ops=100000 --auto-compaction-retention=10 --auto-compaction-mode=revision
-WorkingDirectory=/var/lib/etcd$BASE.etcd
-ExecStartPre=+chown -R etcd /var/lib/etcd$BASE.etcd
+WorkingDirectory=/var/lib/etcd$ETCD_NUM.etcd
+ExecStartPre=+chown -R etcd /var/lib/etcd$ETCD_NUM.etcd
 User=etcd
 PrivateTmp=false
 TasksMax=infinity
 Restart=always
 StartLimitInterval=0
-StartLimitIntervalSec=0
 RestartSec=10

 [Install]
@@ -48,9 +53,7 @@ systemctl start etcd
 useradd vitastor
 chmod 755 /root

-BASE=${IP/*./}
-BASE=$(((BASE-10)*12))
-
+# Vitastor target
 cat >/etc/systemd/system/vitastor.target <<EOF
 [Unit]
 Description=vitastor target
@@ -58,116 +61,25 @@ Description=vitastor target
 WantedBy=multi-user.target
 EOF

-i=1
-for DEV in `ls /dev/disk/by-id/ | grep ata-INTEL_SSDSC2KB`; do
-    dd if=/dev/zero of=/dev/disk/by-id/$DEV bs=1048576 count=$(((427814912+1048575)/1048576+2))
-    dd if=/dev/zero of=/dev/disk/by-id/$DEV bs=1048576 count=$(((427814912+1048575)/1048576+2)) seek=$((1920377991168/1048576))
-cat >/etc/systemd/system/vitastor-osd$((BASE+i)).service <<EOF
+# Monitor unit
+ETCD_MON=$(echo $ETCD_HOSTS | perl -pe 's/:2380/:2379/g; s/etcd\d*=//g;')
+cat >/etc/systemd/system/vitastor-mon.service <<EOF
 [Unit]
-Description=Vitastor object storage daemon osd.$((BASE+i))
+Description=Vitastor monitor
 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=/root/vitastor/osd \\
-    --etcd_address $IP:2379/v3 \\
-    --bind_address $IP \\
-    --osd_num $((BASE+i)) \\
-    --disable_data_fsync 1 \\
-    --disable_device_lock 1 \\
-    --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_offset 0 \\
-    --meta_offset 16777216 \\
-    --data_offset 427814912 \\
-    --data_size $((1920377991168-427814912)) \\
-    --data_device /dev/disk/by-id/$DEV
-WorkingDirectory=/root/vitastor
-ExecStartPre=+chown vitastor:vitastor /dev/disk/by-id/$DEV
+Restart=always
+ExecStart=node /usr/lib/vitastor/mon/mon-main.js --etcd_url '$ETCD_MON' --etcd_prefix '/vitastor' --etcd_start_timeout 5
+WorkingDirectory=/
 User=vitastor
 PrivateTmp=false
 TasksMax=infinity
 Restart=always
 StartLimitInterval=0
-StartLimitIntervalSec=0
 RestartSec=10

 [Install]
 WantedBy=vitastor.target
 EOF
-    systemctl enable vitastor-osd$((BASE+i))
-    i=$((i+1))
-cat >/etc/systemd/system/vitastor-osd$((BASE+i)).service <<EOF
-[Unit]
-Description=Vitastor object storage daemon osd.$((BASE+i))
-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=/root/vitastor/osd \\
-    --etcd_address $IP:2379/v3 \\
-    --bind_address $IP \\
-    --osd_num $((BASE+i)) \\
-    --disable_data_fsync 1 \\
-    --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_offset 1920377991168 \\
-    --meta_offset $((1920377991168+16777216)) \\
-    --data_offset $((1920377991168+427814912)) \\
-    --data_size $((1920377991168-427814912)) \\
-    --data_device /dev/disk/by-id/$DEV
-WorkingDirectory=/root/vitastor
-ExecStartPre=+chown vitastor:vitastor /dev/disk/by-id/$DEV
-User=vitastor
-PrivateTmp=false
-TasksMax=infinity
-Restart=always
-StartLimitInterval=0
-StartLimitIntervalSec=0
-RestartSec=10
-
-[Install]
-WantedBy=vitastor.target
-EOF
-    systemctl enable vitastor-osd$((BASE+i))
-    i=$((i+1))
-done
-
-exit
-
-node mon-main.js --etcd_url 'http://10.115.0.10:2379,http://10.115.0.11:2379,http://10.115.0.12:2379,http://10.115.0.13:2379' --etcd_prefix '/vitastor' --etcd_start_timeout 5
-
-podman run -d --network host --restart always -v /var/lib/etcd0.etcd:/etcd0.etcd --name etcd quay.io/coreos/etcd:v3.4.13 etcd -name etcd0 \
-    -advertise-client-urls http://10.115.0.10:2379 -listen-client-urls http://10.115.0.10:2379 \
-    -initial-advertise-peer-urls http://10.115.0.10:2380 -listen-peer-urls http://10.115.0.10:2380 \
-    -initial-cluster-token vitastor-etcd-1 -initial-cluster etcd0=http://10.115.0.10:2380,etcd1=http://10.115.0.11:2380,etcd2=http://10.115.0.12:2380,etcd3=http://10.115.0.13:2380 \
-    -initial-cluster-state new --max-txn-ops=100000 --auto-compaction-retention=10 --auto-compaction-mode=revision
-
-etcdctl --endpoints http://10.115.0.10:2379 put /vitastor/config/global '{"immediate_commit":"all"}'
-
-etcdctl --endpoints http://10.115.0.10:2379 put /vitastor/config/pools '{"1":{"name":"testpool","scheme":"replicated","pg_size":2,"pg_minsize":1,"pg_count":48,"failure_domain":"host"}}'
-
-#let pgs = {};
-#for (let n = 0; n < 48; n++) { let i = n/2 | 0; pgs[1+n] = { osd_set: [ (1+i%12+(i/12 | 0)*24), (1+12+i%12+(i/12 | 0)*24) ], primary: (1+(n%2)*12+i%12+(i/12 | 0)*24) }; };
-#console.log(JSON.stringify({ items: { 1: pgs } }));
-#etcdctl --endpoints http://10.115.0.10:2379 put /vitastor/config/pgs ...
-
-#    --disk_alignment 4096 --journal_block_size 4096 --meta_block_size 4096 \\
-#    --data_offset 427814912 \\
-
-#    --disk_alignment 4096 --journal_block_size 512 --meta_block_size 512 \\
-#    --data_offset 433434624 \\
--- a/mon/mon-main.js
+++ b/mon/mon-main.js
@@ -1,7 +1,7 @@
 #!/usr/bin/node

 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 const Mon = require('./mon.js');

--- a/mon/mon.js
+++ b/mon/mon.js
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 const http = require('http');
 const crypto = require('crypto');
@@ -253,7 +253,10 @@ class Mon
        const res = await this.etcd_call('/kv/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]);
+        if (res.responses[0].response_range.kvs)
+        {
+            this.parse_kv(res.responses[0].response_range.kvs[0]);
+        }
        this.check_config();
    }

@@ -808,6 +811,17 @@ class Mon
                        }
                        PGUtil.scale_pg_count(prev_pgs, this.state.pg.history[pool_id]||{}, pg_history, pool_cfg.pg_count);
                    }
+                    for (const pg of prev_pgs)
+                    {
+                        while (pg.length < pool_cfg.pg_size)
+                        {
+                            pg.push(0);
+                        }
+                        while (pg.length > pool_cfg.pg_size)
+                        {
+                            pg.pop();
+                        }
+                    }
                    optimize_result = await LPOptimizer.optimize_change({
                        prev_pgs,
                        osd_tree: pool_tree,
@@ -837,7 +851,7 @@ class Mon
                this.save_new_pgs_txn(etcd_request, pool_id, up_osds, prev_pgs, optimize_result.int_pgs, pg_history);
            }
            this.state.config.pgs.hash = tree_hash;
-            await this.save_pg_config();
+            await this.save_pg_config(etcd_request);
        }
        else
        {
--- a/mon/simple-offsets.js
+++ b/mon/simple-offsets.js
@@ -4,6 +4,7 @@
 // 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()
@@ -15,6 +16,7 @@ async function run()
        device_block_size: 4096,
        journal_offset: 0,
        device_size: 0,
+        format: 'text',
    };
    for (let i = 2; i < process.argv.length; i++)
    {
@@ -24,7 +26,22 @@ async function run()
            i++;
        }
    }
-    const device_size = Number(options.device_size || await system("blockdev --getsize64 "+options.device));
+    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');
@@ -32,25 +49,45 @@ async function run()
    }
    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 + options.object_size/options.bitmap_granularity/8));
+    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");
-    process.stdout.write(
-        `Metadata size: ${meta_size_fmt}\n`+
-        `Options for the OSD:\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` : '')
-    );
+    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) : ok(stdout))));
+    return new Promise((ok, no) => child_process.exec(cmd, { maxBuffer: 64*1024*1024 }, (err, stdout, stderr) => (err ? no(err.message) : ok(stdout))));
 }

-run().catch(console.error);
+run().catch(err => { console.error(err); process.exit(1); });
--- a/mon/test-nonuniform.js
+++ b/mon/test-nonuniform.js
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// 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,
--- a/mon/test-optimize-simple.js
+++ b/mon/test-optimize-simple.js
@@ -0,0 +1,25 @@
+// 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);
--- a/mon/test-optimize-undersized.js
+++ b/mon/test-optimize-undersized.js
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 const LPOptimizer = require('./lp-optimizer.js');

--- a/mon/test-optimize.js
+++ b/mon/test-optimize.js
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 const LPOptimizer = require('./lp-optimizer.js');

--- a/rpm/build-tarball.sh
+++ b/rpm/build-tarball.sh
@@ -48,4 +48,4 @@ FIO=`rpm -qi fio | perl -e 'while(<>) { /^Epoch[\s:]+(\S+)/ && print "$1:"; /^Ve
 QEMU=`rpm -qi qemu qemu-kvm | perl -e 'while(<>) { /^Epoch[\s:]+(\S+)/ && print "$1:"; /^Version[\s:]+(\S+)/ && print $1; /^Release[\s:]+(\S+)/ && print "-$1"; }'`
 perl -i -pe 's/(Requires:\s*fio)([^\n]+)?/$1 = '$FIO'/' $VITASTOR/rpm/vitastor-el$EL.spec
 perl -i -pe 's/(Requires:\s*qemu(?:-kvm)?)([^\n]+)?/$1 = '$QEMU'/' $VITASTOR/rpm/vitastor-el$EL.spec
-tar --transform 's#^#vitastor-0.5.1/#' --exclude 'rpm/*.rpm' -czf $VITASTOR/../vitastor-0.5.1$(rpm --eval '%dist').tar.gz *
+tar --transform 's#^#vitastor-0.5.5/#' --exclude 'rpm/*.rpm' -czf $VITASTOR/../vitastor-0.5.5$(rpm --eval '%dist').tar.gz *
--- a/rpm/qemu-el8.Dockerfile
+++ b/rpm/qemu-el8.Dockerfile
@@ -1,5 +1,5 @@
 # Build packages for CentOS 8 inside a container
-# cd ..; podman build -t qemu-el8 -v `pwd`/build:/root/build -f rpm/qemu-el8.Dockerfile .
+# cd ..; podman build -t qemu-el8 -v `pwd`/packages:/root/packages -f rpm/qemu-el8.Dockerfile .

 FROM centos:8

@@ -14,8 +14,8 @@ RUN cd ~/rpmbuild/SPECS && dnf builddep -y --enablerepo=PowerTools --spec qemu-k
 ADD qemu-*-vitastor.patch /root/vitastor/

 RUN set -e; \
-    mkdir -p /root/build/qemu-el8; \
-    rm -rf /root/build/qemu-el8/*; \
+    mkdir -p /root/packages/qemu-el8; \
+    rm -rf /root/packages/qemu-el8/*; \
    rpm --nomd5 -i /root/qemu*.src.rpm; \
    cd ~/rpmbuild/SPECS; \
    PN=$(grep ^Patch qemu-kvm.spec | tail -n1 | perl -pe 's/Patch(\d+).*/$1/'); \
@@ -27,5 +27,5 @@ RUN set -e; \
    perl -i -pe 's/(^Release:\s*\d+)/$1.vitastor/' qemu-kvm.spec; \
    cp /root/vitastor/qemu-4.2-vitastor.patch ~/rpmbuild/SOURCES; \
    rpmbuild --nocheck -ba qemu-kvm.spec; \
-    cp ~/rpmbuild/RPMS/*/*qemu* /root/build/qemu-el8/; \
-    cp ~/rpmbuild/SRPMS/*qemu* /root/build/qemu-el8/
+    cp ~/rpmbuild/RPMS/*/*qemu* /root/packages/qemu-el8/; \
+    cp ~/rpmbuild/SRPMS/*qemu* /root/packages/qemu-el8/
--- a/rpm/qemu-kvm-el7.spec.patch
+++ b/rpm/qemu-kvm-el7.spec.patch
@@ -0,0 +1,257 @@
+--- qemu-kvm.spec.orig	2020-11-09 23:41:03.000000000 +0000
+++ qemu-kvm.spec	2020-12-06 10:44:24.207640963 +0000
+@@ -2,7 +2,7 @@
+ %global SLOF_gittagcommit 899d9883
+ 
+ %global have_usbredir 1
+-%global have_spice    1
+%global have_spice    0
+ %global have_opengl   1
+ %global have_fdt      0
+ %global have_gluster  1
+@@ -56,7 +56,7 @@ Requires: %{name}-block-curl = %{epoch}:
+ Requires: %{name}-block-gluster = %{epoch}:%{version}-%{release} \
+ %endif                                                           \
+ Requires: %{name}-block-iscsi = %{epoch}:%{version}-%{release}   \
+-Requires: %{name}-block-rbd = %{epoch}:%{version}-%{release}     \
+#Requires: %{name}-block-rbd = %{epoch}:%{version}-%{release}     \
+ Requires: %{name}-block-ssh = %{epoch}:%{version}-%{release}
+ 
+ # Macro to properly setup RHEL/RHEV conflict handling
+@@ -67,7 +67,7 @@ Obsoletes: %1-rhev
+ Summary: QEMU is a machine emulator and virtualizer
+ Name: qemu-kvm
+ Version: 4.2.0
+-Release: 29.vitastor%{?dist}.6
+Release: 30.vitastor%{?dist}.6
+ # Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
+ Epoch: 15
+ License: GPLv2 and GPLv2+ and CC-BY
+@@ -99,8 +99,8 @@ Source30: kvm-s390x.conf
+ Source31: kvm-x86.conf
+ Source32: qemu-pr-helper.service
+ Source33: qemu-pr-helper.socket
+-Source34: 81-kvm-rhel.rules
+-Source35: udev-kvm-check.c
+#Source34: 81-kvm-rhel.rules
+#Source35: udev-kvm-check.c
+ Source36: README.tests
+ 
+ 
+@@ -825,7 +825,9 @@ Patch331: kvm-Drop-bogus-IPv6-messages.p
+ Patch333: kvm-virtiofsd-Whitelist-fchmod.patch
+ # For bz#1883869 - virtiofsd core dump in KATA Container [rhel-8.2.1.z]
+ Patch334: kvm-virtiofsd-avoid-proc-self-fd-tempdir.patch
+-Patch335: qemu-4.2-vitastor.patch
+Patch335: qemu-use-sphinx-1.2.patch
+Patch336: qemu-config-tcmalloc-warning.patch
+Patch337: qemu-4.2-vitastor.patch
+ 
+ BuildRequires: wget
+ BuildRequires: rpm-build
+@@ -842,7 +844,8 @@ BuildRequires: pciutils-devel
+ BuildRequires: libiscsi-devel
+ BuildRequires: ncurses-devel
+ BuildRequires: libattr-devel
+-BuildRequires: libusbx-devel >= 1.0.22
+BuildRequires: gperftools-devel
+BuildRequires: libusbx-devel >= 1.0.21
+ %if %{have_usbredir}
+ BuildRequires: usbredir-devel >= 0.7.1
+ %endif
+@@ -856,12 +859,12 @@ BuildRequires: virglrenderer-devel
+ # For smartcard NSS support
+ BuildRequires: nss-devel
+ %endif
+-BuildRequires: libseccomp-devel >= 2.4.0
+#Requires: libseccomp >= 2.4.0
+ # For network block driver
+ BuildRequires: libcurl-devel
+ BuildRequires: libssh-devel
+-BuildRequires: librados-devel
+-BuildRequires: librbd-devel
+#BuildRequires: librados-devel
+#BuildRequires: librbd-devel
+ %if %{have_gluster}
+ # For gluster block driver
+ BuildRequires: glusterfs-api-devel
+@@ -955,25 +958,25 @@ hardware for a full system such as a PC
+ 
+ %package -n qemu-kvm-core
+ Summary: qemu-kvm core components
+Requires: gperftools-libs
+ Requires: qemu-img = %{epoch}:%{version}-%{release}
+ %ifarch %{ix86} x86_64
+ Requires: seabios-bin >= 1.10.2-1
+ Requires: sgabios-bin
+-Requires: edk2-ovmf
+ %endif
+ %ifarch aarch64
+ Requires: edk2-aarch64
+ %endif
+ 
+ %ifnarch aarch64 s390x
+-Requires: seavgabios-bin >= 1.12.0-3
+-Requires: ipxe-roms-qemu >= 20170123-1
+Requires: seavgabios-bin >= 1.11.0-1
+Requires: ipxe-roms-qemu >= 20181214-1
+Requires: /usr/share/ipxe.efi
+ %endif
+ %ifarch %{power64}
+ Requires: SLOF >= %{SLOF_gittagdate}-1.git%{SLOF_gittagcommit}
+ %endif
+ Requires: %{name}-common = %{epoch}:%{version}-%{release}
+-Requires: libseccomp >= 2.4.0
+ # For compressed guest memory dumps
+ Requires: lzo snappy
+ %if %{have_kvm_setup}
+@@ -1085,15 +1088,15 @@ This package provides the additional iSC
+ Install this package if you want to access iSCSI volumes.
+ 
+ 
+-%package  block-rbd
+-Summary: QEMU Ceph/RBD block driver
+-Requires: %{name}-common%{?_isa} = %{epoch}:%{version}-%{release}
+-
+-%description block-rbd
+-This package provides the additional Ceph/RBD block driver for QEMU.
+-
+-Install this package if you want to access remote Ceph volumes
+-using the rbd protocol.
+#%package  block-rbd
+#Summary: QEMU Ceph/RBD block driver
+#Requires: %{name}-common%{?_isa} = %{epoch}:%{version}-%{release}
+#
+#%description block-rbd
+#This package provides the additional Ceph/RBD block driver for QEMU.
+#
+#Install this package if you want to access remote Ceph volumes
+#using the rbd protocol.
+ 
+ 
+ %package  block-ssh
+@@ -1117,12 +1120,14 @@ the Secure Shell (SSH) protocol.
+ # --build-id option is used for giving info to the debug packages.
+ buildldflags="VL_LDFLAGS=-Wl,--build-id"
+ 
+-%global block_drivers_list qcow2,raw,file,host_device,nbd,iscsi,rbd,blkdebug,luks,null-co,nvme,copy-on-read,throttle
+#%global block_drivers_list qcow2,raw,file,host_device,nbd,iscsi,rbd,blkdebug,luks,null-co,nvme,copy-on-read,throttle
+%global block_drivers_list qcow2,raw,file,host_device,nbd,iscsi,blkdebug,luks,null-co,nvme,copy-on-read,throttle
+ 
+ %if 0%{have_gluster}
+     %global block_drivers_list %{block_drivers_list},gluster
+ %endif
+ 
+[ -e /usr/bin/sphinx-build ] || ln -s sphinx-build-3 /usr/bin/sphinx-build
+ ./configure  \
+  --prefix="%{_prefix}" \
+  --libdir="%{_libdir}" \
+@@ -1152,15 +1157,15 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
+ %else
+   --disable-numa \
+ %endif
+-  --enable-rbd \
+  --disable-rbd \
+ %if 0%{have_librdma}
+   --enable-rdma \
+ %else
+   --disable-rdma \
+ %endif
+   --disable-pvrdma \
+-  --enable-seccomp \
+-%if 0%{have_spice}
+  --disable-seccomp \
+%if %{have_spice}
+   --enable-spice \
+   --enable-smartcard \
+   --enable-virglrenderer \
+@@ -1179,7 +1184,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
+ %else
+   --disable-usb-redir \
+ %endif
+-  --disable-tcmalloc \
+  --enable-tcmalloc \
+ %ifarch x86_64
+   --enable-libpmem \
+ %else
+@@ -1193,9 +1198,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
+ %endif
+   --python=%{__python3} \
+   --target-list="%{buildarch}" \
+-  --block-drv-rw-whitelist=%{block_drivers_list} \
+   --audio-drv-list= \
+-  --block-drv-ro-whitelist=vmdk,vhdx,vpc,https,ssh \
+   --with-coroutine=ucontext \
+   --tls-priority=NORMAL \
+   --disable-bluez \
+@@ -1262,7 +1265,7 @@ buildldflags="VL_LDFLAGS=-Wl,--build-id"
+   --disable-sanitizers \
+   --disable-hvf \
+   --disable-whpx \
+-  --enable-malloc-trim \
+  --disable-malloc-trim \
+   --disable-membarrier \
+   --disable-vhost-crypto \
+   --disable-libxml2 \
+@@ -1308,7 +1311,7 @@ make V=1 %{?_smp_mflags} $buildldflags
+ cp -a %{kvm_target}-softmmu/qemu-system-%{kvm_target} qemu-kvm
+ 
+ gcc %{SOURCE6} $RPM_OPT_FLAGS $RPM_LD_FLAGS -o ksmctl
+-gcc %{SOURCE35} $RPM_OPT_FLAGS $RPM_LD_FLAGS -o udev-kvm-check
+#gcc %{SOURCE35} $RPM_OPT_FLAGS $RPM_LD_FLAGS -o udev-kvm-check
+ 
+ %install
+ %define _udevdir %(pkg-config --variable=udevdir udev)
+@@ -1343,8 +1346,8 @@ mkdir -p $RPM_BUILD_ROOT%{testsdir}/test
+ mkdir -p $RPM_BUILD_ROOT%{testsdir}/tests/qemu-iotests
+ mkdir -p $RPM_BUILD_ROOT%{testsdir}/scripts/qmp
+ 
+-install -p -m 0755 udev-kvm-check $RPM_BUILD_ROOT%{_udevdir}
+-install -p -m 0644 %{SOURCE34} $RPM_BUILD_ROOT%{_udevrulesdir}
+#install -p -m 0755 udev-kvm-check $RPM_BUILD_ROOT%{_udevdir}
+#install -p -m 0644 %{SOURCE34} $RPM_BUILD_ROOT%{_udevrulesdir}
+ 
+ install -m 0644 scripts/dump-guest-memory.py \
+                 $RPM_BUILD_ROOT%{_datadir}/%{name}
+@@ -1562,6 +1565,8 @@ rm -rf $RPM_BUILD_ROOT%{qemudocdir}/inte
+ # Remove spec
+ rm -rf $RPM_BUILD_ROOT%{qemudocdir}/specs
+ 
+%global __os_install_post %(echo '%{__os_install_post}' | sed -e 's!/usr/lib[^[:space:]]*/brp-python-bytecompile[[:space:]].*$!!g')
+
+ %check
+ export DIFF=diff; make check V=1
+ 
+@@ -1645,8 +1650,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
+ %config(noreplace) %{_sysconfdir}/sysconfig/ksm
+ %{_unitdir}/ksmtuned.service
+ %{_sbindir}/ksmtuned
+-%{_udevdir}/udev-kvm-check
+-%{_udevrulesdir}/81-kvm-rhel.rules
+#%{_udevdir}/udev-kvm-check
+#%{_udevrulesdir}/81-kvm-rhel.rules
+ %ghost %{_sysconfdir}/kvm
+ %config(noreplace) %{_sysconfdir}/ksmtuned.conf
+ %dir %{_sysconfdir}/%{name}
+@@ -1711,8 +1716,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
+ %{_libexecdir}/vhost-user-gpu
+ %{_datadir}/%{name}/vhost-user/50-qemu-gpu.json
+ %endif
+-%{_libexecdir}/virtiofsd
+-%{_datadir}/%{name}/vhost-user/50-qemu-virtiofsd.json
+#%{_libexecdir}/virtiofsd
+#%{_datadir}/%{name}/vhost-user/50-qemu-virtiofsd.json
+ 
+ %files -n qemu-img
+ %defattr(-,root,root)
+@@ -1748,8 +1753,8 @@ useradd -r -u 107 -g qemu -G kvm -d / -s
+ %files block-iscsi
+ %{_libdir}/qemu-kvm/block-iscsi.so
+ 
+-%files block-rbd
+-%{_libdir}/qemu-kvm/block-rbd.so
+#%files block-rbd
+#%{_libdir}/qemu-kvm/block-rbd.so
+ 
+ %files block-ssh
+ %{_libdir}/qemu-kvm/block-ssh.so
--- a/rpm/vitastor-el7.Dockerfile
+++ b/rpm/vitastor-el7.Dockerfile
@@ -1,5 +1,5 @@
 # Build packages for CentOS 7 inside a container
-# cd ..; podman build -t vitastor-el7 -v `pwd`/build:/root/build -f rpm/vitastor-el7.Dockerfile .
+# cd ..; podman build -t vitastor-el7 -v `pwd`/packages:/root/packages -f rpm/vitastor-el7.Dockerfile .
 # localedef -i ru_RU -f UTF-8 ru_RU.UTF-8

 FROM centos:7
@@ -25,23 +25,23 @@ RUN set -e; \
    cd ~/rpmbuild/SPECS/; \
    . /opt/rh/devtoolset-9/enable; \
    rpmbuild -ba liburing.spec; \
-    mkdir -p /root/build/liburing-el7; \
-    rm -rf /root/build/liburing-el7/*; \
-    cp ~/rpmbuild/RPMS/*/liburing* /root/build/liburing-el7/; \
-    cp ~/rpmbuild/SRPMS/liburing* /root/build/liburing-el7/
+    mkdir -p /root/packages/liburing-el7; \
+    rm -rf /root/packages/liburing-el7/*; \
+    cp ~/rpmbuild/RPMS/*/liburing* /root/packages/liburing-el7/; \
+    cp ~/rpmbuild/SRPMS/liburing* /root/packages/liburing-el7/

-RUN rpm -i `ls /root/build/liburing-el7/liburing-*.x86_64.rpm | grep -v debug`
+RUN rpm -i `ls /root/packages/liburing-el7/liburing-*.x86_64.rpm | grep -v debug`

 ADD . /root/vitastor

 RUN set -e; \
    cd /root/vitastor/rpm; \
    sh build-tarball.sh; \
-    cp /root/vitastor-0.5.1.el7.tar.gz ~/rpmbuild/SOURCES; \
+    cp /root/vitastor-0.5.5.el7.tar.gz ~/rpmbuild/SOURCES; \
    cp vitastor-el7.spec ~/rpmbuild/SPECS/vitastor.spec; \
    cd ~/rpmbuild/SPECS/; \
    rpmbuild -ba vitastor.spec; \
-    mkdir -p /root/build/vitastor-el7; \
-    rm -rf /root/build/vitastor-el7/*; \
-    cp ~/rpmbuild/RPMS/*/vitastor* /root/build/vitastor-el7/; \
-    cp ~/rpmbuild/SRPMS/vitastor* /root/build/vitastor-el7/
+    mkdir -p /root/packages/vitastor-el7; \
+    rm -rf /root/packages/vitastor-el7/*; \
+    cp ~/rpmbuild/RPMS/*/vitastor* /root/packages/vitastor-el7/; \
+    cp ~/rpmbuild/SRPMS/vitastor* /root/packages/vitastor-el7/
--- a/rpm/vitastor-el7.spec
+++ b/rpm/vitastor-el7.spec
@@ -1,11 +1,11 @@
 Name:           vitastor
-Version:        0.5.1
-Release:        2%{?dist}
+Version:        0.5.5
+Release:        1%{?dist}
 Summary:        Vitastor, a fast software-defined clustered block storage

-License:        Vitastor Network Public License 1.0
+License:        Vitastor Network Public License 1.1
 URL:            https://vitastor.io/
-Source0:        vitastor-0.5.1.el7.tar.gz
+Source0:        vitastor-0.5.5.el7.tar.gz

 BuildRequires:  liburing-devel >= 0.6
 BuildRequires:  gperftools-devel
@@ -14,12 +14,14 @@ BuildRequires:  rh-nodejs12
 BuildRequires:  rh-nodejs12-npm
 BuildRequires:  jerasure-devel
 BuildRequires:  gf-complete-devel
+BuildRequires:  cmake
 Requires:       fio = 3.7-1.el7
 Requires:       qemu-kvm = 2.0.0-1.el7.6
 Requires:       rh-nodejs12
 Requires:       rh-nodejs12-npm
 Requires:       liburing >= 0.6
 Requires:       libJerasure2
+Requires:       lpsolve

 %description
 Vitastor is a small, simple and fast clustered block storage (storage for VM drives),
@@ -34,12 +36,13 @@ size with configurable redundancy (replication or erasure codes/XOR).

 %build
 . /opt/rh/devtoolset-9/enable
-make %{?_smp_mflags} BINDIR=%_bindir LIBDIR=%_libdir QEMU_PLUGINDIR=%_libdir/qemu-kvm
+%cmake . -DQEMU_PLUGINDIR=qemu-kvm
+%make_build


 %install
 rm -rf $RPM_BUILD_ROOT
-%make_install BINDIR=%_bindir LIBDIR=%_libdir QEMU_PLUGINDIR=%_libdir/qemu-kvm
+%make_install
 . /opt/rh/rh-nodejs12/enable
 cd mon
 npm install
@@ -55,7 +58,11 @@ cp -r mon %buildroot/usr/lib/vitastor/mon
 %_bindir/vitastor-osd
 %_bindir/vitastor-rm
 %_libdir/qemu-kvm/block-vitastor.so
-%_libdir/vitastor
+%_libdir/libfio_vitastor.so
+%_libdir/libfio_vitastor_blk.so
+%_libdir/libfio_vitastor_sec.so
+%_libdir/libvitastor_blk.so
+%_libdir/libvitastor_client.so
 /usr/lib/vitastor


--- a/rpm/vitastor-el8.Dockerfile
+++ b/rpm/vitastor-el8.Dockerfile
@@ -1,5 +1,5 @@
 # Build packages for CentOS 8 inside a container
-# cd ..; podman build -t vitastor-el8 -v `pwd`/build:/root/build -f rpm/vitastor-el8.Dockerfile .
+# cd ..; podman build -t vitastor-el8 -v `pwd`/packages:/root/packages -f rpm/vitastor-el8.Dockerfile .

 FROM centos:8

@@ -13,8 +13,8 @@ RUN rm -rf /var/lib/dnf/*; dnf download --disablerepo='*' --enablerepo='vitastor
 RUN dnf download --source fio
 RUN rpm --nomd5 -i qemu*.src.rpm
 RUN rpm --nomd5 -i fio*.src.rpm
-RUN cd ~/rpmbuild/SPECS && dnf builddep -y --enablerepo=PowerTools --spec qemu-kvm.spec
-RUN cd ~/rpmbuild/SPECS && dnf builddep -y --enablerepo=PowerTools --spec fio.spec
+RUN cd ~/rpmbuild/SPECS && dnf builddep -y --enablerepo=powertools --spec qemu-kvm.spec
+RUN cd ~/rpmbuild/SPECS && dnf builddep -y --enablerepo=powertools --spec fio.spec && dnf install -y cmake

 ADD https://vitastor.io/rpms/liburing-el7/liburing-0.7-2.el7.src.rpm /root

@@ -23,23 +23,23 @@ RUN set -e; \
    cd ~/rpmbuild/SPECS/; \
    . /opt/rh/gcc-toolset-9/enable; \
    rpmbuild -ba liburing.spec; \
-    mkdir -p /root/build/liburing-el8; \
-    rm -rf /root/build/liburing-el8/*; \
-    cp ~/rpmbuild/RPMS/*/liburing* /root/build/liburing-el8/; \
-    cp ~/rpmbuild/SRPMS/liburing* /root/build/liburing-el8/
+    mkdir -p /root/packages/liburing-el8; \
+    rm -rf /root/packages/liburing-el8/*; \
+    cp ~/rpmbuild/RPMS/*/liburing* /root/packages/liburing-el8/; \
+    cp ~/rpmbuild/SRPMS/liburing* /root/packages/liburing-el8/

-RUN rpm -i `ls /root/build/liburing-el7/liburing-*.x86_64.rpm | grep -v debug`
+RUN rpm -i `ls /root/packages/liburing-el7/liburing-*.x86_64.rpm | grep -v debug`

 ADD . /root/vitastor

 RUN set -e; \
    cd /root/vitastor/rpm; \
    sh build-tarball.sh; \
-    cp /root/vitastor-0.5.1.el8.tar.gz ~/rpmbuild/SOURCES; \
+    cp /root/vitastor-0.5.5.el8.tar.gz ~/rpmbuild/SOURCES; \
    cp vitastor-el8.spec ~/rpmbuild/SPECS/vitastor.spec; \
    cd ~/rpmbuild/SPECS/; \
    rpmbuild -ba vitastor.spec; \
-    mkdir -p /root/build/vitastor-el8; \
-    rm -rf /root/build/vitastor-el8/*; \
-    cp ~/rpmbuild/RPMS/*/vitastor* /root/build/vitastor-el8/; \
-    cp ~/rpmbuild/SRPMS/vitastor* /root/build/vitastor-el8/
+    mkdir -p /root/packages/vitastor-el8; \
+    rm -rf /root/packages/vitastor-el8/*; \
+    cp ~/rpmbuild/RPMS/*/vitastor* /root/packages/vitastor-el8/; \
+    cp ~/rpmbuild/SRPMS/vitastor* /root/packages/vitastor-el8/
--- a/rpm/vitastor-el8.spec
+++ b/rpm/vitastor-el8.spec
@@ -1,11 +1,11 @@
 Name:           vitastor
-Version:        0.5.1
-Release:        2%{?dist}
+Version:        0.5.5
+Release:        1%{?dist}
 Summary:        Vitastor, a fast software-defined clustered block storage

-License:        Vitastor Network Public License 1.0
+License:        Vitastor Network Public License 1.1
 URL:            https://vitastor.io/
-Source0:        vitastor-0.5.1.el8.tar.gz
+Source0:        vitastor-0.5.5.el8.tar.gz

 BuildRequires:  liburing-devel >= 0.6
 BuildRequires:  gperftools-devel
@@ -13,11 +13,13 @@ BuildRequires:  gcc-toolset-9-gcc-c++
 BuildRequires:  nodejs >= 10
 BuildRequires:  jerasure-devel
 BuildRequires:  gf-complete-devel
+BuildRequires:  cmake
 Requires:       fio = 3.7-3.el8
 Requires:       qemu-kvm = 4.2.0-29.el8.6
 Requires:       nodejs >= 10
 Requires:       liburing >= 0.6
 Requires:       libJerasure2
+Requires:       lpsolve

 %description
 Vitastor is a small, simple and fast clustered block storage (storage for VM drives),
@@ -32,12 +34,13 @@ size with configurable redundancy (replication or erasure codes/XOR).

 %build
 . /opt/rh/gcc-toolset-9/enable
-make %{?_smp_mflags} BINDIR=%_bindir LIBDIR=%_libdir QEMU_PLUGINDIR=%_libdir/qemu-kvm
+%cmake . -DQEMU_PLUGINDIR=qemu-kvm
+%make_build


 %install
 rm -rf $RPM_BUILD_ROOT
-%make_install BINDIR=%_bindir LIBDIR=%_libdir QEMU_PLUGINDIR=%_libdir/qemu-kvm
+%make_install
 cd mon
 npm install
 cd ..
@@ -52,7 +55,11 @@ cp -r mon %buildroot/usr/lib/vitastor
 %_bindir/vitastor-osd
 %_bindir/vitastor-rm
 %_libdir/qemu-kvm/block-vitastor.so
-%_libdir/vitastor
+%_libdir/libfio_vitastor.so
+%_libdir/libfio_vitastor_blk.so
+%_libdir/libfio_vitastor_sec.so
+%_libdir/libvitastor_blk.so
+%_libdir/libvitastor_client.so
 /usr/lib/vitastor


--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -0,0 +1,188 @@
+cmake_minimum_required(VERSION 2.8)
+
+project(vitastor)
+
+include(GNUInstallDirs)
+
+set(QEMU_PLUGINDIR qemu CACHE STRING "QEMU plugin directory suffix (qemu-kvm on RHEL)")
+set(WITH_ASAN false CACHE BOOL "Build with AddressSanitizer")
+if("${CMAKE_INSTALL_PREFIX}" MATCHES "^/usr/local/?$")
+	if(EXISTS "/etc/debian_version")
+		set(CMAKE_INSTALL_LIBDIR "lib/${CMAKE_LIBRARY_ARCHITECTURE}")
+	endif()
+	set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
+endif()
+
+add_definitions(-DVERSION="0.6-dev")
+add_definitions(-Wall -Wno-sign-compare -Wno-comment -Wno-parentheses -Wno-pointer-arith)
+if (${WITH_ASAN})
+	add_definitions(-fsanitize=address -fno-omit-frame-pointer)
+	add_link_options(-fsanitize=address -fno-omit-frame-pointer)
+endif (${WITH_ASAN})
+
+set(CMAKE_BUILD_TYPE RelWithDebInfo)
+string(REGEX REPLACE "([\\/\\-]O)[12]?" "\\13" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
+string(REGEX REPLACE "([\\/\\-]O)[12]?" "\\13" CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}")
+string(REGEX REPLACE "([\\/\\-]O)[12]?" "\\13" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
+string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
+string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}")
+string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
+string(REGEX REPLACE "([\\/\\-]O)[12]?" "\\13" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
+string(REGEX REPLACE "([\\/\\-]O)[12]?" "\\13" CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL}")
+string(REGEX REPLACE "([\\/\\-]O)[12]?" "\\13" CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO}")
+string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
+string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL}")
+string(REGEX REPLACE "([\\/\\-]D) *NDEBUG" "" CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO}")
+
+find_package(PkgConfig)
+pkg_check_modules(LIBURING REQUIRED liburing)
+pkg_check_modules(GLIB REQUIRED glib-2.0)
+
+include_directories(
+	../
+	/usr/include/jerasure
+	${LIBURING_INCLUDE_DIRS}
+)
+
+# libvitastor_blk.so
+add_library(vitastor_blk SHARED
+	allocator.cpp blockstore.cpp blockstore_impl.cpp blockstore_init.cpp blockstore_open.cpp blockstore_journal.cpp blockstore_read.cpp
+	blockstore_write.cpp blockstore_sync.cpp blockstore_stable.cpp blockstore_rollback.cpp blockstore_flush.cpp crc32c.c ringloop.cpp
+)
+target_link_libraries(vitastor_blk
+	${LIBURING_LIBRARIES}
+	tcmalloc_minimal
+)
+
+# libfio_vitastor_blk.so
+add_library(fio_vitastor_blk SHARED
+	fio_engine.cpp
+	../json11/json11.cpp
+)
+target_link_libraries(fio_vitastor_blk
+	vitastor_blk
+)
+
+# vitastor-osd
+add_executable(vitastor-osd
+	osd_main.cpp osd.cpp osd_secondary.cpp msgr_receive.cpp msgr_send.cpp osd_peering.cpp osd_flush.cpp osd_peering_pg.cpp
+	osd_primary.cpp osd_primary_subops.cpp etcd_state_client.cpp messenger.cpp osd_cluster.cpp http_client.cpp osd_ops.cpp pg_states.cpp
+	osd_rmw.cpp base64.cpp timerfd_manager.cpp epoll_manager.cpp ../json11/json11.cpp
+)
+target_link_libraries(vitastor-osd
+	vitastor_blk
+	Jerasure
+)
+
+# libfio_vitastor_sec.so
+add_library(fio_vitastor_sec SHARED
+	fio_sec_osd.cpp
+	rw_blocking.cpp
+)
+target_link_libraries(fio_vitastor_sec
+	tcmalloc_minimal
+)
+
+# libvitastor_client.so
+add_library(vitastor_client SHARED
+	cluster_client.cpp epoll_manager.cpp etcd_state_client.cpp
+	messenger.cpp msgr_send.cpp msgr_receive.cpp ringloop.cpp ../json11/json11.cpp
+	http_client.cpp osd_ops.cpp pg_states.cpp timerfd_manager.cpp base64.cpp
+)
+target_link_libraries(vitastor_client
+	tcmalloc_minimal
+	${LIBURING_LIBRARIES}
+)
+
+# libfio_vitastor.so
+add_library(fio_vitastor SHARED
+	fio_cluster.cpp
+)
+target_link_libraries(fio_vitastor
+	vitastor_client
+)
+
+# vitastor-nbd
+add_executable(vitastor-nbd
+	nbd_proxy.cpp
+)
+target_link_libraries(vitastor-nbd
+	vitastor_client
+)
+
+# vitastor-rm
+add_executable(vitastor-rm
+	rm_inode.cpp
+)
+target_link_libraries(vitastor-rm
+	vitastor_client
+)
+
+# vitastor-dump-journal
+add_executable(vitastor-dump-journal
+	dump_journal.cpp crc32c.c
+)
+
+# qemu_driver.so
+add_library(qemu_proxy STATIC qemu_proxy.cpp)
+target_compile_options(qemu_proxy PUBLIC -fPIC)
+target_include_directories(qemu_proxy PUBLIC
+	../qemu/b/qemu
+	../qemu/include
+	${GLIB_INCLUDE_DIRS}
+)
+target_link_libraries(qemu_proxy
+	vitastor_client
+)
+add_library(qemu_vitastor SHARED
+	qemu_driver.c
+)
+target_link_libraries(qemu_vitastor
+	qemu_proxy
+)
+set_target_properties(qemu_vitastor PROPERTIES
+	PREFIX ""
+	OUTPUT_NAME "block-vitastor"
+)
+
+### Test stubs
+
+# stub_osd, stub_bench, osd_test
+add_executable(stub_osd stub_osd.cpp rw_blocking.cpp)
+target_link_libraries(stub_osd tcmalloc_minimal)
+add_executable(stub_bench stub_bench.cpp rw_blocking.cpp)
+target_link_libraries(stub_bench tcmalloc_minimal)
+add_executable(osd_test osd_test.cpp rw_blocking.cpp)
+target_link_libraries(osd_test tcmalloc_minimal)
+
+# osd_rmw_test
+add_executable(osd_rmw_test osd_rmw_test.cpp allocator.cpp)
+target_link_libraries(osd_rmw_test Jerasure tcmalloc_minimal)
+
+# stub_uring_osd
+add_executable(stub_uring_osd
+	stub_uring_osd.cpp epoll_manager.cpp messenger.cpp msgr_send.cpp msgr_receive.cpp ringloop.cpp timerfd_manager.cpp ../json11/json11.cpp
+)
+target_link_libraries(stub_uring_osd
+	${LIBURING_LIBRARIES}
+	tcmalloc_minimal
+)
+
+# osd_peering_pg_test
+add_executable(osd_peering_pg_test osd_peering_pg_test.cpp osd_peering_pg.cpp)
+target_link_libraries(osd_peering_pg_test tcmalloc_minimal)
+
+# test_allocator
+add_executable(test_allocator test_allocator.cpp allocator.cpp)
+
+## test_blockstore, test_shit
+#add_executable(test_blockstore test_blockstore.cpp timerfd_interval.cpp)
+#target_link_libraries(test_blockstore blockstore)
+#add_executable(test_shit test_shit.cpp osd_peering_pg.cpp)
+#target_link_libraries(test_shit ${LIBURING_LIBRARIES} m)
+
+### Install
+
+install(TARGETS vitastor-osd vitastor-dump-journal vitastor-nbd vitastor-rm RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+install(TARGETS fio_vitastor fio_vitastor_blk fio_vitastor_sec vitastor_blk vitastor_client LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
+install(TARGETS qemu_vitastor LIBRARY DESTINATION /usr/${CMAKE_INSTALL_LIBDIR}/${QEMU_PLUGINDIR})
--- a/src/allocator.cpp
+++ b/src/allocator.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include <stdexcept>
 #include "allocator.h"
--- a/src/allocator.h
+++ b/src/allocator.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #pragma once

--- a/src/base64.cpp
+++ b/src/base64.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "base64.h"

--- a/src/base64.h
+++ b/src/base64.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #pragma once
 #include <string>
--- a/src/blockstore.cpp
+++ b/src/blockstore.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "blockstore_impl.h"

--- a/src/blockstore.h
+++ b/src/blockstore.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #pragma once

--- a/src/blockstore_flush.cpp
+++ b/src/blockstore_flush.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "blockstore_impl.h"

@@ -7,6 +7,8 @@ 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;
@@ -68,10 +70,24 @@ bool journal_flusher_t::is_active()

 void journal_flusher_t::loop()
 {
-    for (int i = 0; (active_flushers > 0 || dequeuing) && i < flusher_count; i++)
+    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)
    {
-        co[i].loop();
+        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)
@@ -223,6 +239,7 @@ bool journal_flusher_co::loop()
 resume_0:
    if (!flusher->flush_queue.size() || !flusher->dequeuing)
    {
+stop_flusher:
        if (flusher->trim_wanted > 0 && flusher->journal_trim_counter > 0)
        {
            // Attempt forced trim
@@ -327,9 +344,7 @@ resume_0:
 #ifdef BLOCKSTORE_DEBUG
                    printf("No older flushes, stopping\n");
 #endif
-                    flusher->dequeuing = false;
-                    wait_state = 0;
-                    return true;
+                    goto stop_flusher;
                }
            }
        }
--- a/src/blockstore_flush.h
+++ b/src/blockstore_flush.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 struct copy_buffer_t
 {
@@ -80,7 +80,7 @@ class journal_flusher_t
 {
    int trim_wanted = 0;
    bool dequeuing;
-    int flusher_count;
+    int flusher_count, cur_flusher_count, target_flusher_count;
    int flusher_start_threshold;
    journal_flusher_co *co;
    blockstore_impl_t *bs;
--- a/src/blockstore_impl.cpp
+++ b/src/blockstore_impl.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "blockstore_impl.h"

@@ -287,7 +287,7 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
    else if (PRIV(op)->wait_for == WAIT_JOURNAL_BUFFER)
    {
        int next = ((journal.cur_sector + 1) % journal.sector_count);
-        if (journal.sector_info[next].usage_count > 0 ||
+        if (journal.sector_info[next].flush_count > 0 ||
            journal.sector_info[next].dirty)
        {
            // do not submit
--- a/src/blockstore_impl.h
+++ b/src/blockstore_impl.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #pragma once

@@ -199,7 +199,10 @@ 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;
-    int flusher_count;
+    // Maximum flusher count
+    unsigned flusher_count;
+    // Maximum queue depth
+    unsigned max_write_iodepth = 128;
    /******* END OF OPTIONS *******/

    struct ring_consumer_t ring_consumer;
@@ -226,6 +229,7 @@ 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;
--- a/src/blockstore_init.cpp
+++ b/src/blockstore_init.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "blockstore_impl.h"

--- a/src/blockstore_init.h
+++ b/src/blockstore_init.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #pragma once

--- a/src/blockstore_journal.cpp
+++ b/src/blockstore_journal.cpp
@@ -1,12 +1,12 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// 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_required = 0;
+    sectors_to_write = 0;
    next_pos = bs->journal.next_free;
    next_sector = bs->journal.cur_sector;
    first_sector = -1;
@@ -20,23 +20,26 @@ 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 && bs->journal.sector_info[next_sector].written
+        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;
        if (fits > 0)
        {
+            if (fits > required)
+            {
+                fits = required;
+            }
            if (first_sector == -1)
            {
                first_sector = next_sector;
            }
            required -= fits;
            next_in_pos += fits * size;
-            sectors_required++;
+            sectors_to_write++;
        }
        else if (bs->journal.sector_info[next_sector].dirty)
        {
-            // sectors_required is more like "sectors to write"
-            sectors_required++;
+            sectors_to_write++;
        }
        if (required <= 0)
        {
@@ -59,7 +62,7 @@ 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].usage_count > 0 ||
+        if (bs->journal.sector_info[next_sector].flush_count > 0 ||
            bs->journal.sector_info[next_sector].dirty)
        {
            // No memory buffer available. Wait for it.
@@ -71,17 +74,18 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
                    dirty++;
                    used++;
                }
-                if (bs->journal.sector_info[i].usage_count > 0)
+                if (bs->journal.sector_info[i].flush_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\n",
+                "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",
                used, bs->journal.sector_count, dirty, next_sector,
                bs->journal.sector_info[next_sector].dirty ? "dirty" : "not dirty",
-                bs->journal.sector_info[next_sector].usage_count
+                bs->journal.sector_info[next_sector].flush_count
            );
            PRIV(op)->wait_for = WAIT_JOURNAL_BUFFER;
            return 0;
@@ -100,11 +104,8 @@ 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 (free space: %lu bytes, sectors to write: %d)\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),
-            sectors_required
+            "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
        );
        PRIV(op)->wait_for = WAIT_JOURNAL;
        bs->flusher->request_trim();
@@ -116,22 +117,21 @@ 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.block_size - journal.in_sector_pos < size ||
-        journal.no_same_sector_overwrites && journal.sector_info[journal.cur_sector].written)
+    if (!journal.entry_fits(size))
    {
        assert(!journal.sector_info[journal.cur_sector].dirty);
        // Move to the next journal sector
-        journal.sector_info[journal.cur_sector].written = false;
-        if (journal.sector_info[journal.cur_sector].usage_count > 0)
+        if (journal.sector_info[journal.cur_sector].flush_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].usage_count);
+            assert(!journal.sector_info[journal.cur_sector].flush_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;
@@ -157,7 +157,7 @@ void prepare_journal_sector_write(journal_t & journal, int cur_sector, io_uring_
 {
    journal.sector_info[cur_sector].dirty = false;
    journal.sector_info[cur_sector].written = true;
-    journal.sector_info[cur_sector].usage_count++;
+    journal.sector_info[cur_sector].flush_count++;
    ring_data_t *data = ((ring_data_t*)sqe->user_data);
    data->iov = (struct iovec){
        (journal.inmemory
--- a/src/blockstore_journal.h
+++ b/src/blockstore_journal.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #pragma once

@@ -133,7 +133,7 @@ inline uint32_t je_crc32(journal_entry *je)
 struct journal_sector_info_t
 {
    uint64_t offset;
-    uint64_t usage_count;
+    uint64_t flush_count;
    bool written;
    bool dirty;
 };
@@ -170,13 +170,18 @@ 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_required, first_sector;
+    int sectors_to_write, first_sector;
    bool right_dir; // writing to the end or the beginning of the ring buffer

    blockstore_journal_check_t(blockstore_impl_t *bs);
--- a/src/blockstore_open.cpp
+++ b/src/blockstore_open.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include <sys/file.h>
 #include "blockstore_impl.h"
@@ -70,6 +70,7 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
    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)
    {
@@ -83,6 +84,10 @@ 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;
--- a/src/blockstore_read.cpp
+++ b/src/blockstore_read.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "blockstore_impl.h"

--- a/src/blockstore_rollback.cpp
+++ b/src/blockstore_rollback.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "blockstore_impl.h"

@@ -75,44 +75,35 @@ skip_ov:
        return 0;
    }
    // There is sufficient space. Get SQEs
-    struct io_uring_sqe *sqe[space_check.sectors_required];
-    for (i = 0; i < space_check.sectors_required; i++)
+    struct io_uring_sqe *sqe[space_check.sectors_to_write];
+    for (i = 0; i < space_check.sectors_to_write; 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;
-    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;
-        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++)
    {
+        if (!journal.entry_fits(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;
+        }
        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;
-        if (cur_sector != journal.cur_sector)
-        {
-            // Write previous sector. We should write the sector only after filling it,
-            // because otherwise we'll write a lot more sectors in the "no_same_sector_overwrite" mode
-            if (cur_sector != -1)
-                prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
-            else
-                PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
-            cur_sector = journal.cur_sector;
-        }
    }
-    if (cur_sector != -1)
-        prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
+    prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
+    assert(s == space_check.sectors_to_write);
+    if (cur_sector == -1)
+        PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
    PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
    PRIV(op)->pending_ops = s;
    PRIV(op)->op_state = 1;
--- a/src/blockstore_stable.cpp
+++ b/src/blockstore_stable.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "blockstore_impl.h"

@@ -98,45 +98,36 @@ 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_required];
-    for (i = 0; i < space_check.sectors_required; i++)
+    struct io_uring_sqe *sqe[space_check.sectors_to_write];
+    for (i = 0; i < space_check.sectors_to_write; 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;
-    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;
-        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
+        if (!journal.entry_fits(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;
+        }
        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;
-        if (cur_sector != journal.cur_sector)
-        {
-            // Write previous sector. We should write the sector only after filling it,
-            // because otherwise we'll write a lot more sectors in the "no_same_sector_overwrite" mode
-            if (cur_sector != -1)
-                prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
-            else
-                PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
-            cur_sector = journal.cur_sector;
-        }
    }
-    if (cur_sector != -1)
-        prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
+    prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
+    assert(s == space_check.sectors_to_write);
+    if (cur_sector == -1)
+        PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
    PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
    PRIV(op)->pending_ops = s;
    PRIV(op)->op_state = 1;
--- a/src/blockstore_sync.cpp
+++ b/src/blockstore_sync.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "blockstore_impl.h"

@@ -112,30 +112,29 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op)
            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_required];
-        for (int i = 0; i < space_check.sectors_required; i++)
+        struct io_uring_sqe *sqe[space_check.sectors_to_write];
+        for (int i = 0; i < space_check.sectors_to_write; 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;
-        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;
-            cur_sector = journal.cur_sector;
-            prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
-        }
        while (it != PRIV(op)->sync_big_writes.end())
        {
+            if (!journal.entry_fits(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++], cb);
+                cur_sector = journal.cur_sector;
+            }
            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)
            );
            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(
@@ -152,19 +151,11 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op)
            je->crc32 = je_crc32((journal_entry*)je);
            journal.crc32_last = je->crc32;
            it++;
-            if (cur_sector != journal.cur_sector)
-            {
-                // Write previous sector. We should write the sector only after filling it,
-                // because otherwise we'll write a lot more sectors in the "no_same_sector_overwrite" mode
-                if (cur_sector != -1)
-                    prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
-                else
-                    PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
-                cur_sector = journal.cur_sector;
-            }
        }
-        if (cur_sector != -1)
-            prepare_journal_sector_write(journal, cur_sector, sqe[s++], cb);
+        prepare_journal_sector_write(journal, journal.cur_sector, sqe[s++], cb);
+        assert(s == space_check.sectors_to_write);
+        if (cur_sector == -1)
+            PRIV(op)->min_flushed_journal_sector = 1 + journal.cur_sector;
        PRIV(op)->max_flushed_journal_sector = 1 + journal.cur_sector;
        PRIV(op)->pending_ops = s;
        PRIV(op)->op_state = SYNC_JOURNAL_WRITE_SENT;
--- a/src/blockstore_write.cpp
+++ b/src/blockstore_write.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "blockstore_impl.h"

@@ -167,6 +167,10 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
            .version = op->version,
        }, e).first;
    }
+    if (write_iodepth >= max_write_iodepth)
+    {
+        return 0;
+    }
    if ((dirty_it->second.state & BS_ST_TYPE_MASK) == BS_ST_BIG_WRITE)
    {
        blockstore_journal_check_t space_check(this);
@@ -191,6 +195,7 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
            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;
@@ -243,6 +248,7 @@ 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 ||
@@ -377,7 +383,6 @@ resume_2:
        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(
@@ -433,6 +438,7 @@ resume_4:
    }
    // Acknowledge write
    op->retval = op->len;
+    write_iodepth--;
    FINISH_OP(op);
    return 1;
 }
@@ -469,8 +475,8 @@ 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].usage_count--;
-            if (s != (1+journal.cur_sector) && journal.sector_info[s-1].usage_count == 0)
+            journal.sector_info[s-1].flush_count--;
+            if (s != (1+journal.cur_sector) && journal.sector_info[s-1].flush_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;
--- a/src/cluster_client.cpp
+++ b/src/cluster_client.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #include <stdexcept>
 #include "cluster_client.h"
@@ -473,7 +473,7 @@ void cluster_client_t::slice_rw(cluster_op_t *op)
    // Primary OSDs still operate individual stripes, but their size is multiplied by PG minsize in case of EC
    auto & pool_cfg = st_cli.pool_config[INODE_POOL(op->inode)];
    uint64_t pg_block_size = bs_block_size * (
-        pool_cfg.scheme == POOL_SCHEME_REPLICATED ? 1 : pool_cfg.pg_minsize
+        pool_cfg.scheme == POOL_SCHEME_REPLICATED ? 1 : pool_cfg.pg_size-pool_cfg.parity_chunks
    );
    uint64_t first_stripe = (op->offset / pg_block_size) * pg_block_size;
    uint64_t last_stripe = ((op->offset + op->len + pg_block_size - 1) / pg_block_size - 1) * pg_block_size;
--- a/src/cluster_client.h
+++ b/src/cluster_client.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #pragma once

--- a/src/crc32c.c
+++ b/src/crc32c.c
--- a/src/crc32c.h
+++ b/src/crc32c.h
@@ -8,4 +8,10 @@
 // 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
--- a/src/dump_journal.cpp
+++ b/src/dump_journal.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #define _LARGEFILE64_SOURCE
 #include <sys/types.h>
@@ -26,23 +26,32 @@ struct journal_dump_t
    uint64_t journal_offset;
    uint64_t journal_len;
    uint64_t journal_pos;
+    bool all;
+    bool started;
    int fd;
+    uint32_t crc32_last;

-    void dump_block(void *buf);
+    int dump_block(void *buf);
 };

 int main(int argc, char *argv[])
 {
-    if (argc < 5)
+    journal_dump_t self = { 0 };
+    int b = 1;
+    if (argc >= 2 && !strcmp(argv[1], "--all"))
    {
-        printf("USAGE: %s <journal_file> <journal_block_size> <offset> <size>\n", argv[0]);
+        self.all = true;
+        b = 2;
+    }
+    if (argc < b+4)
+    {
+        printf("USAGE: %s [--all] <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);
+    self.journal_device = argv[b];
+    self.journal_block = strtoul(argv[b+1], NULL, 10);
+    self.journal_offset = strtoull(argv[b+2], NULL, 10);
+    self.journal_len = strtoull(argv[b+3], NULL, 10);
    if (self.journal_block < MEM_ALIGNMENT || (self.journal_block % MEM_ALIGNMENT) ||
        self.journal_block > 128*1024)
    {
@@ -57,30 +66,64 @@ int main(int argc, char *argv[])
    }
    void *data = memalign(MEM_ALIGNMENT, self.journal_block);
    self.journal_pos = 0;
-    while (self.journal_pos < self.journal_len)
+    if (self.all)
+    {
+        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;
+            }
+        }
+    }
+    else
    {
        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)
+        journal_entry *je = (journal_entry*)(data);
+        if (je->magic != JOURNAL_MAGIC || je->type != JE_START || je_crc32(je) != je->crc32)
        {
-            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);
+            printf("offset %08lx: journal superblock is invalid\n", self.journal_pos);
        }
        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;
+            printf("offset %08lx:\n", self.journal_pos);
+            self.dump_block(data);
+            self.started = false;
+            self.journal_pos = je->start.journal_start;
+            while (1)
+            {
+                if (self.journal_pos >= self.journal_len)
+                    self.journal_pos = self.journal_block;
+                r = pread(self.fd, data, self.journal_block, self.journal_offset+self.journal_pos);
+                assert(r == self.journal_block);
+                printf("offset %08lx:\n", self.journal_pos);
+                r = self.dump_block(data);
+                if (r <= 0)
+                {
+                    printf("end of the journal\n");
+                    break;
+                }
+            }
        }
    }
    free(data);
@@ -88,7 +131,7 @@ int main(int argc, char *argv[])
    return 0;
 }

-void journal_dump_t::dump_block(void *buf)
+int journal_dump_t::dump_block(void *buf)
 {
    uint32_t pos = 0;
    journal_pos += journal_block;
@@ -97,12 +140,19 @@ void journal_dump_t::dump_block(void *buf)
    while (pos < journal_block)
    {
        journal_entry *je = (journal_entry*)(buf + pos);
-        if (je->magic != JOURNAL_MAGIC || je->type < JE_MIN || je->type > JE_MAX)
+        if (je->magic != JOURNAL_MAGIC || je->type < JE_MIN || je->type > JE_MAX ||
+            !all && started && je->crc32_prev != crc32_last)
        {
            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);
+        bool crc32_valid = je_crc32(je) == je->crc32;
+        if (!all && !crc32_valid)
+        {
+            break;
+        }
+        started = true;
+        crc32_last = je->crc32;
+        printf("entry % 3d: crc32=%08x %s prev=%08x ", entry, je->crc32, (crc32_valid ? "(valid)" : "(invalid)"), je->crc32_prev);
        if (je->type == JE_START)
        {
            printf("je_start start=%08lx\n", je->start.journal_start);
@@ -170,4 +220,5 @@ void journal_dump_t::dump_block(void *buf)
    {
        journal_pos = journal_len;
    }
+    return entry;
 }
--- a/src/epoll_manager.cpp
+++ b/src/epoll_manager.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #include <sys/epoll.h>
 #include <sys/poll.h>
@@ -84,8 +84,12 @@ void epoll_manager_t::handle_epoll_events()
        nfds = epoll_wait(epoll_fd, events, MAX_EPOLL_EVENTS, 0);
        for (int i = 0; i < nfds; i++)
        {
-            auto & cb = epoll_handlers[events[i].data.fd];
-            cb(events[i].data.fd, events[i].events);
+            auto cb_it = epoll_handlers.find(events[i].data.fd);
+            if (cb_it != epoll_handlers.end())
+            {
+                auto & cb = cb_it->second;
+                cb(events[i].data.fd, events[i].events);
+            }
        }
    } while (nfds == MAX_EPOLL_EVENTS);
 }
--- a/src/epoll_manager.h
+++ b/src/epoll_manager.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #pragma once

--- a/src/etcd_state_client.cpp
+++ b/src/etcd_state_client.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #include "osd_ops.h"
 #include "pg_states.h"
--- a/src/etcd_state_client.h
+++ b/src/etcd_state_client.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #pragma once

--- a/src/fio_cluster.cpp
+++ b/src/fio_cluster.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 // FIO engine to test cluster I/O
 //
@@ -93,7 +93,7 @@ static struct fio_option options[] = {
    {
        .name   = "cluster_log_level",
        .lname  = "cluster log level",
-        .type   = FIO_OPT_BOOL,
+        .type   = FIO_OPT_INT,
        .off1   = offsetof(struct sec_options, cluster_log),
        .help   = "Set log level for the Vitastor client",
        .def    = "0",
@@ -145,9 +145,7 @@ static void sec_cleanup(struct thread_data *td)
        delete bsd->cli;
        delete bsd->epmgr;
        delete bsd->ringloop;
-        bsd->cli = NULL;
-        bsd->epmgr = NULL;
-        bsd->ringloop = NULL;
+        delete bsd;
    }
 }

--- a/src/fio_engine.cpp
+++ b/src/fio_engine.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 // FIO engine to test Blockstore
 //
--- a/src/fio_headers.h
+++ b/src/fio_headers.h
--- a/src/fio_sec_osd.cpp
+++ b/src/fio_sec_osd.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 // FIO engine to test Blockstore through Secondary OSD interface
 //
@@ -140,6 +140,7 @@ static void sec_cleanup(struct thread_data *td)
    if (bsd)
    {
        close(bsd->connect_fd);
+        delete bsd;
    }
 }

@@ -312,6 +313,7 @@ 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)
--- a/src/http_client.cpp
+++ b/src/http_client.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #include <netinet/tcp.h>
 #include <sys/epoll.h>
--- a/src/http_client.h
+++ b/src/http_client.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #pragma once
 #include <string>
--- a/src/malloc_or_die.h
+++ b/src/malloc_or_die.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #pragma once

--- a/src/messenger.cpp
+++ b/src/messenger.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #include <unistd.h>
 #include <fcntl.h>
@@ -30,7 +30,7 @@ osd_messenger_t::~osd_messenger_t()
 {
    while (clients.size() > 0)
    {
-        stop_client(clients.begin()->first);
+        stop_client(clients.begin()->first, true);
    }
 }

@@ -111,7 +111,7 @@ void osd_messenger_t::try_connect_peer_addr(osd_num_t peer_osd, const char *peer
        timeout_id = tfd->set_timer(1000*peer_connect_timeout, false, [this, peer_fd](int timer_id)
        {
            osd_num_t peer_osd = clients.at(peer_fd)->osd_num;
-            stop_client(peer_fd);
+            stop_client(peer_fd, true);
            on_connect_peer(peer_osd, -EIO);
            return;
        });
@@ -149,7 +149,7 @@ void osd_messenger_t::handle_connect_epoll(int peer_fd)
    }
    if (result != 0)
    {
-        stop_client(peer_fd);
+        stop_client(peer_fd, true);
        on_connect_peer(peer_osd, -result);
        return;
    }
@@ -171,7 +171,7 @@ void osd_messenger_t::handle_peer_epoll(int peer_fd, int epoll_events)
    {
        // Stop client
        printf("[OSD %lu] client %d disconnected\n", this->osd_num, peer_fd);
-        stop_client(peer_fd);
+        stop_client(peer_fd, true);
    }
    else if (epoll_events & EPOLLIN)
    {
@@ -309,7 +309,7 @@ void osd_messenger_t::cancel_op(osd_op_t *op)
    }
 }

-void osd_messenger_t::stop_client(int peer_fd)
+void osd_messenger_t::stop_client(int peer_fd, bool force)
 {
    assert(peer_fd != 0);
    auto it = clients.find(peer_fd);
@@ -334,6 +334,10 @@ void osd_messenger_t::stop_client(int peer_fd)
                printf("[OSD %lu] Stopping client %d (regular client)\n", osd_num, peer_fd);
        }
    }
+    else if (!force)
+    {
+        return;
+    }
    cl->peer_state = PEER_STOPPED;
    clients.erase(it);
    tfd->set_fd_handler(peer_fd, false, NULL);
@@ -348,7 +352,14 @@ void osd_messenger_t::stop_client(int peer_fd)
    }
    if (cl->read_op)
    {
-        delete cl->read_op;
+        if (cl->read_op->callback)
+        {
+            cancel_op(cl->read_op);
+        }
+        else
+        {
+            delete cl->read_op;
+        }
        cl->read_op = NULL;
    }
    for (auto rit = read_ready_clients.begin(); rit != read_ready_clients.end(); rit++)
--- a/src/messenger.h
+++ b/src/messenger.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #pragma once

@@ -275,7 +275,7 @@ struct osd_messenger_t

 public:
    void connect_peer(uint64_t osd_num, json11::Json peer_state);
-    void stop_client(int peer_fd);
+    void stop_client(int peer_fd, bool force = false);
    void outbox_push(osd_op_t *cur_op);
    std::function<void(osd_op_t*)> exec_op;
    std::function<void(osd_num_t)> repeer_pgs;
--- a/src/msgr_receive.cpp
+++ b/src/msgr_receive.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #include "messenger.h"

@@ -9,6 +9,10 @@ void osd_messenger_t::read_requests()
    {
        int peer_fd = read_ready_clients[i];
        osd_client_t *cl = clients[peer_fd];
+        if (cl->read_msg.msg_iovlen)
+        {
+            continue;
+        }
        if (cl->read_remaining < receive_buffer_size)
        {
            cl->read_iov.iov_base = cl->in_buf;
@@ -29,6 +33,7 @@ void osd_messenger_t::read_requests()
            io_uring_sqe* sqe = ringloop->get_sqe();
            if (!sqe)
            {
+                cl->read_msg.msg_iovlen = 0;
                read_ready_clients.erase(read_ready_clients.begin(), read_ready_clients.begin() + i);
                return;
            }
@@ -52,6 +57,7 @@ void osd_messenger_t::read_requests()
 bool osd_messenger_t::handle_read(int result, osd_client_t *cl)
 {
    bool ret = false;
+    cl->read_msg.msg_iovlen = 0;
    cl->refs--;
    if (cl->peer_state == PEER_STOPPED)
    {
@@ -160,8 +166,14 @@ bool osd_messenger_t::handle_finished_read(osd_client_t *cl)
    {
        if (cl->read_op->req.hdr.magic == SECONDARY_OSD_REPLY_MAGIC)
            return handle_reply_hdr(cl);
-        else
+        else if (cl->read_op->req.hdr.magic == SECONDARY_OSD_OP_MAGIC)
            handle_op_hdr(cl);
+        else
+        {
+            printf("Received garbage: magic=%lx id=%lu opcode=%lx from %d\n", cl->read_op->req.hdr.magic, cl->read_op->req.hdr.id, cl->read_op->req.hdr.opcode, cl->peer_fd);
+            stop_client(cl->peer_fd);
+            return false;
+        }
    }
    else if (cl->read_state == CL_READ_DATA)
    {
--- a/src/msgr_send.cpp
+++ b/src/msgr_send.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #define _XOPEN_SOURCE
 #include <limits.h>
@@ -46,7 +46,8 @@ void osd_messenger_t::outbox_push(osd_op_t *cur_op)
        to_send_list.push_back((iovec){ .iov_base = cur_op->req.buf, .iov_len = OSD_PACKET_SIZE });
        cl->sent_ops[cur_op->req.hdr.id] = cur_op;
    }
-    // Pre-defined send_lists
+    to_outbox.push_back(NULL);
+    // Operation data
    if ((cur_op->op_type == OSD_OP_IN
        ? (cur_op->req.hdr.opcode == OSD_OP_READ ||
        cur_op->req.hdr.opcode == OSD_OP_SEC_READ ||
@@ -58,17 +59,17 @@ void osd_messenger_t::outbox_push(osd_op_t *cur_op)
        cur_op->req.hdr.opcode == OSD_OP_SEC_STABILIZE ||
        cur_op->req.hdr.opcode == OSD_OP_SEC_ROLLBACK)) && cur_op->iov.count > 0)
    {
-        to_outbox.push_back(NULL);
        for (int i = 0; i < cur_op->iov.count; i++)
        {
            assert(cur_op->iov.buf[i].iov_base);
            to_send_list.push_back(cur_op->iov.buf[i]);
-            to_outbox.push_back(i == cur_op->iov.count-1 ? cur_op : NULL);
+            to_outbox.push_back(NULL);
        }
    }
-    else
+    if (cur_op->op_type == OSD_OP_IN)
    {
-        to_outbox.push_back(cur_op);
+        // To free it later
+        to_outbox[to_outbox.size()-1] = cur_op;
    }
    if (!ringloop)
    {
@@ -92,6 +93,10 @@ void osd_messenger_t::outbox_push(osd_op_t *cur_op)
 void osd_messenger_t::measure_exec(osd_op_t *cur_op)
 {
    // Measure execution latency
+    if (cur_op->req.hdr.opcode > OSD_OP_MAX)
+    {
+        return;
+    }
    timespec tv_end;
    clock_gettime(CLOCK_REALTIME, &tv_end);
    stats.op_stat_count[cur_op->req.hdr.opcode]++;
@@ -198,11 +203,8 @@ void osd_messenger_t::handle_send(int result, osd_client_t *cl)
            {
                if (cl->outbox[done])
                {
-                    // Operation fully sent
-                    if (cl->outbox[done]->op_type == OSD_OP_IN)
-                    {
-                        delete cl->outbox[done];
-                    }
+                    // Reply fully sent
+                    delete cl->outbox[done];
                }
                result -= iov.iov_len;
                done++;
--- a/src/nbd_proxy.cpp
+++ b/src/nbd_proxy.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)
 // Similar to qemu-nbd, but sets timeout and uses io_uring

 #include <linux/nbd.h>
@@ -111,7 +111,7 @@ public:
    {
        printf(
            "Vitastor NBD proxy\n"
-            "(c) Vitaliy Filippov, 2020 (VNPL-1.0)\n\n"
+            "(c) Vitaliy Filippov, 2020 (VNPL-1.1)\n\n"
            "USAGE:\n"
            "  %s map --etcd_address <etcd_address> --pool <pool> --inode <inode> --size <size in bytes>\n"
            "  %s unmap /dev/nbd0\n"
--- a/src/object_id.h
+++ b/src/object_id.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #pragma once

--- a/src/osd.cpp
+++ b/src/osd.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include <sys/socket.h>
 #include <sys/poll.h>
--- a/src/osd.h
+++ b/src/osd.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #pragma once

--- a/src/osd_cluster.cpp
+++ b/src/osd_cluster.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "osd.h"
 #include "base64.h"
@@ -384,6 +384,7 @@ void osd_t::create_osd_state()
        {
            st_cli.load_pgs();
        }
+        report_statistics();
    });
 }

@@ -801,11 +802,11 @@ void osd_t::report_pg_states()
                    if (pg_it->second.state == PG_OFFLINE)
                    {
                        // Remove offline PGs after reporting their state
-                        this->pgs.erase(pg_it);
                        if (pg_it->second.scheme == POOL_SCHEME_JERASURE)
                        {
                            use_jerasure(pg_it->second.pg_size, pg_it->second.pg_size-pg_it->second.parity_chunks, false);
                        }
+                        this->pgs.erase(pg_it);
                    }
                }
            }
--- a/src/osd_flush.cpp
+++ b/src/osd_flush.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "osd.h"

--- a/src/osd_id.h
+++ b/src/osd_id.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #pragma once

--- a/src/osd_main.cpp
+++ b/src/osd_main.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "osd.h"

--- a/src/osd_ops.cpp
+++ b/src/osd_ops.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #include "osd_ops.h"

--- a/src/osd_ops.h
+++ b/src/osd_ops.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 or GNU GPL-2.0+ (see README.md for details)
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)

 #pragma once

--- a/src/osd_peering.cpp
+++ b/src/osd_peering.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include <netinet/tcp.h>
 #include <sys/epoll.h>
--- a/src/osd_peering_pg.cpp
+++ b/src/osd_peering_pg.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include <unordered_map>
 #include "osd_peering_pg.h"
--- a/src/osd_peering_pg.h
+++ b/src/osd_peering_pg.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include <map>
 #include <vector>
@@ -94,7 +94,7 @@ 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 the cur_set.
+    // moved object map. by default, each object is considered to reside on 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
--- a/src/osd_peering_pg_test.cpp
+++ b/src/osd_peering_pg_test.cpp
@@ -1,8 +1,9 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// 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

--- a/src/osd_primary.cpp
+++ b/src/osd_primary.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "osd_primary.h"

@@ -489,7 +489,11 @@ resume_7:
        }
        // 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({ .pool_id = pg.pool_id, .pg_num = pg.pg_num });
+        auto cl_it = c_cli.clients.find(cur_op->peer_fd);
+        if (cl_it != c_cli.clients.end())
+        {
+            cl_it->second->dirty_pgs.insert({ .pool_id = pg.pool_id, .pg_num = pg.pg_num });
+        }
        dirty_pgs.insert({ .pool_id = pg.pool_id, .pg_num = pg.pg_num });
    }
    return true;
--- a/src/osd_primary.h
+++ b/src/osd_primary.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #pragma once

--- a/src/osd_primary_subops.cpp
+++ b/src/osd_primary_subops.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "osd_primary.h"

@@ -295,7 +295,7 @@ void osd_t::handle_primary_subop(osd_op_t *subop, osd_op_t *cur_op)
            uint64_t version = subop->reply.sec_rw.version;
 #ifdef OSD_DEBUG
            uint64_t peer_osd = c_cli.clients.find(subop->peer_fd) != c_cli.clients.end()
-                ? c_cli.clients[subop->peer_fd].osd_num : osd_num;
+                ? c_cli.clients[subop->peer_fd]->osd_num : osd_num;
            printf("subop %lu from osd %lu: version = %lu\n", opcode, peer_osd, version);
 #endif
            if (op_data->fact_ver != 0 && op_data->fact_ver != version)
--- a/src/osd_rmw.cpp
+++ b/src/osd_rmw.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include <stdexcept>
 #include <string.h>
@@ -11,6 +11,8 @@
 #include "osd_rmw.h"
 #include "malloc_or_die.h"

+#define OSD_JERASURE_W 8
+
 static inline void extend_read(uint32_t start, uint32_t end, osd_rmw_stripe_t & stripe)
 {
    if (stripe.read_end == 0)
@@ -158,7 +160,7 @@ void use_jerasure(int pg_size, int pg_minsize, bool use)
        {
            return;
        }
-        int *matrix = reed_sol_vandermonde_coding_matrix(pg_minsize, pg_size-pg_minsize, 32);
+        int *matrix = reed_sol_vandermonde_coding_matrix(pg_minsize, pg_size-pg_minsize, OSD_JERASURE_W);
        matrices[key] = (reed_sol_matrix_t){
            .refs = 0,
            .data = matrix,
@@ -214,8 +216,8 @@ int* get_jerasure_decoding_matrix(osd_rmw_stripe_t *stripes, int pg_size, int pg
        int *decoding_matrix = dm_ids + pg_minsize;
        if (!dm_ids)
            throw std::bad_alloc();
-        // we always use row_k_ones=1 and w=32
-        if (jerasure_make_decoding_matrix(pg_minsize, pg_size-pg_minsize, 32, matrix->data, erased, decoding_matrix, dm_ids) < 0)
+        // we always use row_k_ones=1 and w=8 (OSD_JERASURE_W)
+        if (jerasure_make_decoding_matrix(pg_minsize, pg_size-pg_minsize, OSD_JERASURE_W, matrix->data, erased, decoding_matrix, dm_ids) < 0)
        {
            free(dm_ids);
            throw std::runtime_error("jerasure_make_decoding_matrix() failed");
@@ -252,7 +254,7 @@ void reconstruct_stripes_jerasure(osd_rmw_stripe_t *stripes, int pg_size, int pg
            }
            data_ptrs[role] = (char*)stripes[role].read_buf;
            jerasure_matrix_dotprod(
-                pg_minsize, 32, decoding_matrix+(role*pg_minsize), dm_ids, role,
+                pg_minsize, OSD_JERASURE_W, decoding_matrix+(role*pg_minsize), dm_ids, role,
                data_ptrs, data_ptrs+pg_minsize, stripes[role].read_end - stripes[role].read_start
            );
        }
@@ -694,7 +696,7 @@ void calc_rmw_parity_jerasure(osd_rmw_stripe_t *stripes, int pg_size, int pg_min
                    }
                }
                jerasure_matrix_encode(
-                    pg_minsize, pg_size-pg_minsize, 32, matrix->data,
+                    pg_minsize, pg_size-pg_minsize, OSD_JERASURE_W, matrix->data,
                    (char**)data_ptrs, (char**)data_ptrs+pg_minsize, next_end-pos
                );
                pos = next_end;
--- a/src/osd_rmw.h
+++ b/src/osd_rmw.h
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #pragma once

--- a/src/osd_rmw_test.cpp
+++ b/src/osd_rmw_test.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #define RMW_DEBUG

--- a/src/osd_secondary.cpp
+++ b/src/osd_secondary.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include "osd.h"

--- a/src/osd_test.cpp
+++ b/src/osd_test.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) Vitaliy Filippov, 2019+
-// License: VNPL-1.0 (see README.md for details)
+// License: VNPL-1.1 (see README.md for details)

 #include <sys/types.h>
 #include <sys/socket.h>
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Vitaliy Filippov	bb2d9a3afe	Release 0.5.5 - Transition to CMake build system - Fix Monitor being unable to change PG sizes - Fix PG optimizer not using some OSDs in some cases - Fix inability to change PG count online - Improve journal flusher performance - Add a little better systemd unit generator - Use w=8 with jerasure (breaking change for EC pools)	2021-02-26 01:59:18 +03:00
Vitaliy Filippov	e899ed2c25	Make OSDs with 256 flushers (as they are now dynamic)	2021-02-26 01:59:18 +03:00
Vitaliy Filippov	e21b14b72c	Fix rpm specs for building with CMake	2021-02-26 01:59:18 +03:00
Vitaliy Filippov	5af8eddaa9	Add the remaining build script for Debian	2021-02-26 01:59:18 +03:00
Vitaliy Filippov	4f5a94c07a	Modify instructions for the CMake build	2021-02-26 00:28:57 +03:00
Vitaliy Filippov	e16b87ecc8	Rename random_combinations() parameter from "unordered" to "ordered" as it's more correct	2021-02-25 23:59:34 +03:00
Vitaliy Filippov	fcb4aa0a11	Fix Monitor being unable to change PG sizes	2021-02-25 23:59:34 +03:00
Vitaliy Filippov	12adfa470c	Add a test for changing PG size	2021-02-25 23:59:33 +03:00
Vitaliy Filippov	7f15e0c084	Add a simple test for the PG optimizer	2021-02-25 23:59:33 +03:00
Vitaliy Filippov	08d4bef419	Fix PG optimizer removing PGs without adding new ones This happened when the distribution was already valid for the current OSD tree, but didn't use all OSDs. For example, OSDs 1 2 3 and all PGs equal to [ 1, 2 ] remained unchanged.	2021-02-25 23:59:33 +03:00
Vitaliy Filippov	2d73b19a6c	Fix online PG count change bugs	2021-02-25 23:59:33 +03:00
Vitaliy Filippov	69c87009e9	Add a test for changing PG count	2021-02-25 23:59:33 +03:00
Vitaliy Filippov	c974cb539c	Make flusher_count adaptive and limit write iodepth	2021-02-25 23:59:33 +03:00
Vitaliy Filippov	00e98f64f3	A little better systemd unit generator	2021-02-25 23:59:33 +03:00
Vitaliy Filippov	91a70dfb1b	Add a test for the no_same_sector_overwrites mode	2021-02-25 23:59:33 +03:00
Vitaliy Filippov	178388ac8c	Use packages/ subdir instead of build/ for Docker package builds	2021-02-25 23:59:04 +03:00
Vitaliy Filippov	bf9a175efc	Move C/C++ sources to src subdirectory	2021-02-25 23:59:03 +03:00
Vitaliy Filippov	08aed962de	Use CMake	2021-02-25 23:58:08 +03:00
Vitaliy Filippov	8c65e890b9	Slightly clean up the build script	2021-02-25 23:56:54 +03:00
Vitaliy Filippov	8cda70b889	Allow to enable AddressSanitizer with "ASAN=1 make"	2021-02-25 23:55:33 +03:00
Vitaliy Filippov	61ab22403a	Use w=8 with jerasure	2021-02-25 23:55:33 +03:00
Vitaliy Filippov	16da663a66	Add another test for failure domains	2021-02-25 23:55:33 +03:00
Vitaliy Filippov	4a2dcf7b6b	Update the license to VNPL 1.1 VNPL 1.1 is slightly reworded to make it clear that proprietary software interacting with Vitastor and providing some kind of service to end users isn't a "Proxy Program" if it's not specially designed to be used with Vitastor. For example, Windows OS running in a virtual machine stored in a Vitastor cluster clearly isn't.	2021-02-25 23:55:33 +03:00
Vitaliy Filippov	8d48cc56b0	Generate randomly permutated OSD combinations when optimizing for compressed chunks	2021-02-25 23:55:33 +03:00
Vitaliy Filippov	9f58f01425	Mirror afr.js from /vitalif/ceph-afr-calc	2021-02-25 23:55:33 +03:00
Vitaliy Filippov	b9e7d31aa1	Release v0.5.4 - Fix a rare hang, more or less reproducible with very slow drives - Fix a hang with the no_same_sector_overwrites mode	2021-02-24 01:40:30 +03:00
Vitaliy Filippov	2d9f09dcb6	Attempt forced trim when stopping an overrun flusher Fixes a rare hang happening in the event of journal space running out without new work to do for flushers except the current sector. The hang could be reproduced more or less consistently with very slow drives.	2021-02-24 01:33:01 +03:00
Vitaliy Filippov	7cc59260c5	Fix no_same_sector_overwrites related bug	2021-02-23 18:50:51 +03:00
Vitaliy Filippov	ca0a11ec85	Release 0.5.3	2021-02-03 00:38:57 +03:00
Vitaliy Filippov	51c0b5afee	Whitelist more leaks	2021-02-02 02:05:41 +03:00
Vitaliy Filippov	e1e01d042e	Rename sector_info.usage_count to flush_count	2021-02-02 01:32:23 +03:00
Vitaliy Filippov	534a4a657e	Rename space_check.sectors_required to sectors_to_write	2021-02-02 01:30:23 +03:00
Vitaliy Filippov	9b5d8b9ad4	Fix multiple-sector journal writes, add assertions to not miss any SQEs	2021-02-02 01:29:11 +03:00
Vitaliy Filippov	e66ed47515	Clear SQEs before returning them to the caller to prevent erroneous double submissions	2021-02-02 01:26:54 +03:00
Vitaliy Filippov	036c6d4c42	Add a simple test case	2021-02-01 19:43:10 +03:00
Vitaliy Filippov	4cb79a3bf8	Allow to calculate simple-offsets for files	2021-02-01 19:43:10 +03:00
Vitaliy Filippov	3bf53754c2	Fix several I/O bugs	2021-02-01 19:43:10 +03:00
Vitaliy Filippov	6023cac361	Do not stop clients before they are connected	2021-02-01 19:31:10 +03:00
Vitaliy Filippov	915d04c446	Allow empty global configuration, report OSD statistics faster	2021-02-01 19:31:10 +03:00
Vitaliy Filippov	21e06ea40d	Fix memory leaks in fio engines	2021-02-01 19:31:10 +03:00
Vitaliy Filippov	9ef7f865b0	Fix incorrect calls to prepare_journal_sector_write() when flushing multiple sectors	2021-02-01 19:31:10 +03:00
Vitaliy Filippov	9dd20a31aa	Do not use pg_minsize in the client code!	2021-02-01 19:31:10 +03:00
Vitaliy Filippov	28be049909	Dump only actual part of the journal by default	2021-01-01 23:04:30 +03:00
Vitaliy Filippov	78fbaacf1f	External jerasure's w into defines In fact, w=8 looks better than w=32, so it may be changed in the future	2020-12-31 19:15:22 +03:00
Vitaliy Filippov	1526c5a213	Add lp_solve into dependencies	2020-12-31 01:32:31 +03:00
Vitaliy Filippov	c7cc414c90	Skip removed descriptors in epoll (this is possible in real clusters)	2020-12-30 17:04:18 +03:00
Vitaliy Filippov	f4ea313707	Fix cl->read_op being freed without calling the completion callback	2020-12-30 16:55:54 +03:00
Vitaliy Filippov	b88b76f316	Parallel usage of multiple network interfaces was a sick fantasy	2020-12-30 00:05:17 +03:00
Vitaliy Filippov	4a17a61d1f	Make rm_inode work with incomplete and degraded objects, allow to wait before deleting objects	2020-12-28 16:38:08 +03:00
Vitaliy Filippov	ccabbbfbcb	For reference: include a spec patch for building QEMU 4.2 or CentOS 7	2020-12-06 15:43:38 +03:00
Vitaliy Filippov	26dac57083	State that jerasure is now supported	2020-12-06 15:25:48 +03:00