- Do not try to allocate more DB blocks in an inode block until it's "confirmed" and "locked" by the first write
- Do not recheck for new zero DB blocks on first write into an inode block - a CAS failure means someone else is already writing into it
- Throw new allocation blocks away regardless of whether the known_version is 0 on a CAS failure
- do not overwrite a block with older version if known version is newer
(read may start before update and end after update)
- invalidated block versions can't be remembered and trusted
- right boundary for split blocks is right_half when diving down, not key_lt
- restart update also when block is "invalidated", not just on version mismatch
- copy callback in listings to avoid closure destruction bugs too
- Prevent _split types of new blocks
- Stop updating new blocks only after the whole update, otherwise pointers
may become invalid
- Use recheck_none for updates initially
- Use UINT64_MAX as initial block version when postponing ops, otherwise the
check fails when the block is initially empty. This for example leads to
writing both leaf items & block pointers (which is incorrect) into the root
block when starting stress-test with --parallelism 32
- Fix -EINTR comparison
- track block versions correctly - per inode block (128kb) instead of tree block (4kb)
- prevent multiple parallel CAS writes of the same inode block
- add logging for EILSEQ which means invalid data in the tree
- fix get_block updated flag which was true for blocks already in cache and was leading to infinite loops on "unrelated block" errors
- apply changes to blocks in cache only after successful writes (using "virtual changes")
- do not replace cached block with an older version from disk
- recheck "unrelated blocks" (read/update collisions) until data stops changing
- track tree path correctly - do not treat split block as parent of its right half
- correctly move blocks when finding new empty place on disk
- restart updates from the beginning when one of blocks is changed by a parallel update
- fix delete using SET opcode and setting key to the empty value instead
- prevent changing the same key more than 1 time in parallel
- fix listing verification
- resume continue_updates in update_find (required because it uses continue_update itself)
- add allow_old_cached parameter to get()
Test / test_scrub_zero_osd_2 (push) Successful in 38sDetails
Test / test_heal_csum_4k_dmj (push) Successful in 7m5sDetails
Test / test_scrub_xor (push) Successful in 58sDetails
Test / test_heal_csum_4k_dj (push) Successful in 6m25sDetails
Test / test_scrub_ec (push) Failing after 42sDetails
Test / test_scrub_pg_size_6_pg_minsize_4_osd_count_6_ec (push) Successful in 1m32sDetails
Test / test_scrub_pg_size_3 (push) Successful in 1m38sDetails
Test / test_heal_csum_4k (push) Successful in 5m38sDetails
- Fix a monitor crash on primary OSD switching introduced in 1.4.0
- Fix "partly outside array bounds" warnings for GCC 12 in cpp-btree
- Fix a realloc memory leak in theory possible with too large listings (OSD_OP_LIST)
- Saturated parallel write iops: min(network bandwidth, sum(disk write iops * number of data drives / (number of data + parity drives) / write amplification)).
In fact, you should put disk write iops under the condition of ~10% reads / ~90% writes in this formula.
- Linear read: `min(total network bandwidth, sum(disk read MB/s))`.
- С отложенным ("ленивым") сбросом: 4 RTT + 1 запись + 1 fsync.
- Параллельное чтение: сумма IOPS всех дисков либо производительность сети, если в сеть упрётся раньше.
- Параллельная запись: сумма IOPS всех дисков / число реплик / WA либо производительность сети, если в сеть упрётся раньше.
- Линейное чтение: сумма МБ/с чтения всех дисков, либо общая производительность сети (сумма пропускной способности сети всех нод), если в сеть упрётся раньше.
- Линейная запись: сумма МБ/с записи всех дисков / число реплик, либо производительность сети / число реплик, если в сеть упрётся раньше.
- Параллельное случайное мелкое чтение: сумма IOPS чтения всех дисков, либо производительность сети, если в сеть упрётся раньше.
- Параллельная случайная мелкая запись: сумма IOPS записи всех дисков / число реплик / WA, либо производительность сети / число реплик, если в сеть упрётся раньше.
При использовании кодов коррекции ошибок (EC):
При использовании кодов коррекции ошибок (EC N+K):
$ETCDCTL put /vitastor/config/global '{"recovery_queue_depth":1,"recovery_tune_util_low":1,"osd_out_time":1,"immediate_commit":"all","client_enable_writeback":true}'
$ETCDCTL put /vitastor/config/global '{"recovery_queue_depth":1,"recovery_tune_util_low":1,"immediate_commit":"all","client_enable_writeback":true,"client_max_writeback_iodepth":32'$GLOBAL_CONFIG'}'
$ETCDCTL put /vitastor/config/global '{"recovery_queue_depth":1,"recovery_tune_util_low":1,"osd_out_time":1,"client_enable_writeback":true}'
$ETCDCTL put /vitastor/config/global '{"recovery_queue_depth":1,"recovery_tune_util_low":1,"client_enable_writeback":true,"client_max_writeback_iodepth":32'$GLOBAL_CONFIG'}'