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5296 Commits (6041e50eba2aff99208b53da6e8d0329d2076784)
| Author | SHA1 | Message | Date |
|---|---|---|---|
Ignat Loskutov
|
7c67aee4a0 |
statistics.cc: fix mistype (#11509)
Summary:
Add new tickers: `rocksdb.error.handler.bg.error.count`, `rocksdb.error.handler.bg.io.error.count`, `rocksdb.error.handler.bg.retryable.io.error.count` to replace the misspelled ones: `rocksdb.error.handler.bg.errro.count`, `rocksdb.error.handler.bg.io.errro.count`, `rocksdb.error.handler.bg.retryable.io.errro.count` ('error' instead of 'errro'). Users should switch to use the new tickers before 9.0 release as the misspelled old tickers will be completely removed then.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11509
Reviewed By: ltamasi
Differential Revision: D46542809
Pulled By: jowlyzhang
fbshipit-source-id: a2a6d8354af46a060de81d40ef6f5336a80bd32e
|
1 year ago |
|
Ignat Loskutov
|
05fcacdb42 |
Add missing stopwatch and perf timer to DBImplReadOnly (#11521)
Summary:
The `rocksdb.db.get.micros` histogram is never updated if the DB is open in ReadOnly mode, as well as the `get_cpu_nanos` perf counter. An earlier PR (https://github.com/facebook/rocksdb/issues/4260) for some reason has only added the TODO line, not the accounting itself, so this one is intended to fix it, adding two lines to match [DBImplSecondary](
|
1 year ago |
|
Changyu Bi
|
2e8cc98ab2 |
Fix subcompaction bug to allow running two subcompactions (#11501)
Summary: as reported in https://github.com/facebook/rocksdb/issues/11476, RocksDB currently does not execute compactions in two subcompactions even when they qualify. This PR fixes this issue. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11501 Test Plan: * Add a new unit test. * Run crash test with max_subcompactions=2: `python3 tools/db_crashtest.py blackbox --simple --subcompactions=2 --target_file_size_base=1048576 --compaction_style=0` * saw logs showing compactions being executed as 2 subcompactions ``` 2023/06/01-17:28:44.028470 3147486 (Original Log Time 2023/06/01-17:28:44.025972) EVENT_LOG_v1 {"time_micros": 1685665724025939, "job": 6, "event": "compaction_finished", "compaction_time_micros": 34539, "compaction_time_cpu_micros": 26404, "output_level": 6, "num_output_files": 2, "total_output_size": 1109796, "num_input_records": 13188, "num_output_records": 13021, "num_subcompactions": 2, "output_compression": "NoCompression", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "lsm_state": [0, 0, 0, 0, 0, 0, 13]} ``` Reviewed By: ajkr Differential Revision: D46411497 Pulled By: cbi42 fbshipit-source-id: 3ebfc02e19f78f782e114a9546dc3d481d496258 |
1 year ago |
|
leipeng
|
ddfcbea3e1 |
IterKey: change space_[32] to 39 to utilize padding space (#10633)
Summary: This PR utilize padding space. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10633 Reviewed By: pdillinger Differential Revision: D46410978 Pulled By: ajkr fbshipit-source-id: 23ec757b1eea9221c1390971e39d341c6b7f2003 |
1 year ago |
|
Changyu Bi
|
633c738a98 |
Fix unit test `DBRangeDelTest.NonBottommostCompactionDropRangetombstone` (#11512)
Summary: Fix the test added in https://github.com/facebook/rocksdb/issues/11459 that is failing. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11512 Test Plan: `./db_range_del_test --gtest_filter="*NonBottommostCompactionDropRangetombstone"` Reviewed By: pdillinger Differential Revision: D46451450 Pulled By: cbi42 fbshipit-source-id: bcad20b8fd21c4f71924cec6cb045ee4b2038b90 |
1 year ago |
|
Yu Zhang
|
4dafa5b220 |
switch to use RocksDB UnorderedMap (#11507)
Summary: Switch from std::unordered_map to RocksDB UnorderedMap for all the places that logging user-defined timestamp size in WAL used. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11507 Test Plan: ``` make all check ``` Reviewed By: ltamasi Differential Revision: D46448975 Pulled By: jowlyzhang fbshipit-source-id: bdb4d56a723b697a33daaf0f856a61d49a367a99 |
1 year ago |
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Changyu Bi
|
4aa52d89cf |
Drop range tombstone during non-bottommost compaction (#11459)
Summary: Similar to point tombstones, we can drop a range tombstone during compaction when we know its range does not exist in any higher level. This PR adds this optimization. Some existing test in db_range_del_test is fixed to work under this optimization. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11459 Test Plan: * Add unit test `DBRangeDelTest, NonBottommostCompactionDropRangetombstone`. * Ran crash test that issues range deletion for a few hours: `python3 tools/db_crashtest.py blackbox --simple --write_buffer_size=1048576 --delrangepercent=10 --writepercent=31 --readpercent=40` Reviewed By: ajkr Differential Revision: D46007904 Pulled By: cbi42 fbshipit-source-id: 3f37205b6778b7d55ed106369ca41b0632a6d0fd |
1 year ago |
|
Changyu Bi
|
71ca9a1dcd |
Log correct compaction score for Universal Compaction (#11487)
Summary: currently 0 is incorrectly logged as the compaction score for L0 when num_levels > 1. This PR fixes the issue to log the correct score. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11487 Test Plan: ``` ./db_bench --benchmarks=fillrandom --max_background_jobs=8 --num=1000000 --compaction_style=1 --stats_dump_period_sec=20 --num_levels=7 --write_buffer_size=1048576 grep "L0 " /tmp/rocksdbtest-543376/dbbench/LOG before: ** Compaction Stats [default] ** Priority Files Size Score Read(GB) Rn(GB) Rnp1(GB) Write(GB) Wnew(GB) Moved(GB) W-Amp Rd(MB/s) Wr(MB/s) Comp(sec) CompMergeCPU(sec) Comp(cnt) Avg(sec) KeyIn KeyDrop Rblob(GB) Wblob(GB) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- L0 0/0 0.00 KB 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 0.0 9.9 0.42 0.33 9 0.046 0 0 0.0 0.0 L0 3/1 1.37 MB 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.1 0.6 9.6 3.76 3.03 76 0.050 34K 140 0.0 0.0 L0 2/0 2.26 MB 0.0 0.0 0.0 0.0 0.1 0.1 0.0 1.6 3.2 8.2 12.59 11.17 163 0.077 619K 5499 0.0 0.0 after: compaction scores are non-zero L0 0/0 0.00 KB 0.8 0.0 0.0 0.0 0.0 0.0 0.0 1.0 0.0 9.6 0.43 0.34 9 0.048 0 0 0.0 0.0 L0 2/1 937.08 KB 1.0 0.0 0.0 0.0 0.0 0.0 0.0 1.1 0.6 9.3 3.85 3.07 75 0.051 34K 165 0.0 0.0 L0 2/2 1.82 MB 1.0 0.0 0.0 0.0 0.1 0.1 0.0 1.6 3.0 8.0 12.45 10.99 160 0.078 577K 5399 0.0 0.0 ``` Reviewed By: ajkr Differential Revision: D46293993 Pulled By: cbi42 fbshipit-source-id: 19753f7df68c5f54a84c4ed52794f83e510c9721 |
1 year ago |
|
Changyu Bi
|
e95cc1217d |
`CompactRange()` always compacts to bottommost level for leveled compaction (#11468)
Summary:
currently for leveled compaction, the max output level of a call to `CompactRange()` is pre-computed before compacting each level. This max output level is the max level whose key range overlaps with the manual compaction key range. However, during manual compaction, files in the max output level may be compacted down further by some background compaction. When this background compaction is a trivial move, there is a race condition and the manual compaction may not be able to compact all keys in the specified key range. This PR updates `CompactRange()` to always compact to the bottommost level to make this race condition more unlikely (it can still happen, see more in comment here:
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1 year ago |
|
Jay Huh
|
87bc929db3 |
Flush option in WaitForCompact() (#11483)
Summary: Context: As mentioned in https://github.com/facebook/rocksdb/issues/11436, introducing `flush` option in `WaitForCompactOptions` to flush before waiting for compactions to finish. Must be set to true to ensure no immediate compactions (except perhaps periodic compactions) after closing and re-opening the DB. 1. `bool flush = false` added to `WaitForCompactOptions` 2. `DBImpl::FlushAllColumnFamilies()` is introduced and `DBImpl::FlushForGetLiveFiles()` is refactored to call it. 3. `DBImpl::FlushAllColumnFamilies()` gets called before waiting in `WaitForCompact()` if `flush` option is `true` 4. Some previous WaitForCompact tests were parameterized to include both cases for `abort_on_pause_` being true/false as well as `flush_` being true/false Pull Request resolved: https://github.com/facebook/rocksdb/pull/11483 Test Plan: - `DBCompactionTest::WaitForCompactWithOptionToFlush` added - Changed existing DBCompactionTest::WaitForCompact tests to `DBCompactionWaitForCompactTest` to include params Reviewed By: pdillinger Differential Revision: D46289770 Pulled By: jaykorean fbshipit-source-id: 70d3f461d96a6e06390be60170dd7c4d0d38f8b0 |
1 year ago |
|
Yu Zhang
|
56ca9e3106 |
Logging timestamp size record in WAL and use it during recovery (#11471)
Summary: Start logging the timestamp size record in WAL and use the record during recovery. Currently, user comparator cannot be different from what was used to create a column family, so the timestamp size record is just used to confirm it's consistent with the timestamp size the running user comparator indicates. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11471 Test Plan: ``` make all check ./db_secondary_test ./db_wal_test --gtest_filter="*WithTimestamp*" ./repair_test --gtest_filter="*WithTimestamp*" ``` Reviewed By: ltamasi Differential Revision: D46236769 Pulled By: jowlyzhang fbshipit-source-id: f6c60b5c8defdb05021c63df302ccc0be1275ad0 |
1 year ago |
|
Changyu Bi
|
e1c7209beb |
Fix flaky test: `DBCompactionTest.WaitForCompactShutdownWhileWaiting` (#11488)
Summary:
tsan complains with the following error message. This is likely due to DB object destroyed while WaitForCompact() is still running.
```
[ RUN ] DBCompactionTest.WaitForCompactShutdownWhileWaiting
==================
WARNING: ThreadSanitizer: data race (pid=1128703)
Atomic read of size 1 at 0x7b8c00000740 by thread T4:
#0 pthread_cond_wait <null> (db_compaction_test+0x46970a)
https://github.com/facebook/rocksdb/issues/1 rocksdb::port::CondVar::Wait() /root/project/port/port_posix.cc:119:23 (librocksdb.so.8.4+0x7c4c60)
https://github.com/facebook/rocksdb/issues/2 rocksdb::InstrumentedCondVar::WaitInternal() /root/project/monitoring/instrumented_mutex.cc:69:9 (librocksdb.so.8.4+0x75f697)
https://github.com/facebook/rocksdb/issues/3 rocksdb::InstrumentedCondVar::Wait() /root/project/monitoring/instrumented_mutex.cc:62:3 (librocksdb.so.8.4+0x75f697)
https://github.com/facebook/rocksdb/issues/4 rocksdb::DBImpl::WaitForCompact(rocksdb::WaitForCompactOptions const&) /root/project/db/db_impl/db_impl_compaction_flush.cc:3978:14 (librocksdb.so.8.4+0x494174)
https://github.com/facebook/rocksdb/issues/5 rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_30::operator()() const /root/project/db/db_compaction_test.cc:3479:26 (db_compaction_test+0x5cdc90)
https://github.com/facebook/rocksdb/issues/6 void std::__invoke_impl<void, rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_30>(std::__invoke_other, rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_30&&) /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/invoke.h:61:14 (db_compaction_test+0x5cdc90)
https://github.com/facebook/rocksdb/issues/7 std::__invoke_result<rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_30>::type std::__invoke<rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_30>(rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_30&&) /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/invoke.h:96:14 (db_compaction_test+0x5cdc90)
https://github.com/facebook/rocksdb/issues/8 void std:🧵:_Invoker<std::tuple<rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_30> >::_M_invoke<0ul>(std::_Index_tuple<0ul>) /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/std_thread.h:253:13 (db_compaction_test+0x5cdc90)
https://github.com/facebook/rocksdb/issues/9 std:🧵:_Invoker<std::tuple<rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_30> >::operator()() /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/std_thread.h:260:11 (db_compaction_test+0x5cdc90)
https://github.com/facebook/rocksdb/issues/10 std:🧵:_State_impl<std:🧵:_Invoker<std::tuple<rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_30> > >::_M_run() /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/std_thread.h:211:13 (db_compaction_test+0x5cdc90)
https://github.com/facebook/rocksdb/issues/11 <null> <null> (libstdc++.so.6+0xda6b3)
Previous write of size 1 at 0x7b8c00000740 by thread T5:
#0 pthread_mutex_destroy <null> (db_compaction_test+0x46a4f8)
https://github.com/facebook/rocksdb/issues/1 rocksdb::port::Mutex::~Mutex() /root/project/port/port_posix.cc:77:48 (librocksdb.so.8.4+0x7c480e)
https://github.com/facebook/rocksdb/issues/2 rocksdb::InstrumentedMutex::~InstrumentedMutex() /root/project/./monitoring/instrumented_mutex.h:20:7 (librocksdb.so.8.4+0x41fda6)
https://github.com/facebook/rocksdb/issues/3 rocksdb::DBImpl::~DBImpl() /root/project/db/db_impl/db_impl.cc:755:1 (librocksdb.so.8.4+0x41fda6)
https://github.com/facebook/rocksdb/issues/4 rocksdb::DBImpl::~DBImpl() /root/project/db/db_impl/db_impl.cc:737:19 (librocksdb.so.8.4+0x4203d9)
https://github.com/facebook/rocksdb/issues/5 rocksdb::DBTestBase::Close() /root/project/db/db_test_util.cc:670:3 (librocksdb_test_debug.so+0x57413)
https://github.com/facebook/rocksdb/issues/6 rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_31::operator()() const /root/project/db/db_compaction_test.cc:3485:49 (db_compaction_test+0x5cdf03)
https://github.com/facebook/rocksdb/issues/7 void std::__invoke_impl<void, rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_31>(std::__invoke_other, rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_31&&) /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/invoke.h:61:14 (db_compaction_test+0x5cdf03)
https://github.com/facebook/rocksdb/issues/8 std::__invoke_result<rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_31>::type std::__invoke<rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_31>(rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_31&&) /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/invoke.h:96:14 (db_compaction_test+0x5cdf03)
https://github.com/facebook/rocksdb/issues/9 void std:🧵:_Invoker<std::tuple<rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_31> >::_M_invoke<0ul>(std::_Index_tuple<0ul>) /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/std_thread.h:253:13 (db_compaction_test+0x5cdf03)
https://github.com/facebook/rocksdb/issues/10 std:🧵:_Invoker<std::tuple<rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_31> >::operator()() /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/std_thread.h:260:11 (db_compaction_test+0x5cdf03)
https://github.com/facebook/rocksdb/issues/11 std:🧵:_State_impl<std:🧵:_Invoker<std::tuple<rocksdb::DBCompactionTest_WaitForCompactShutdownWhileWaiting_Test::TestBody()::$_31> > >::_M_run() /usr/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/std_thread.h:211:13 (db_compaction_test+0x5cdf03)
https://github.com/facebook/rocksdb/issues/12 <null> <null> (libstdc++.so.6+0xda6b3)
```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11488
Test Plan:
```
COMPILE_WITH_TSAN=1 CC=clang-13 CXX=clang++-13 ROCKSDB_DISABLE_ALIGNED_NEW=1 USE_CLANG=1 make V=1 -j32 db_compaction_test
gtest-parallel --repeat=10000 ./db_compaction_test --gtest_filter="*WaitForCompactShutdownWhileWaiting*" -w200
```
Reviewed By: jaykorean
Differential Revision: D46293891
Pulled By: cbi42
fbshipit-source-id: 8ca259cb1e09a9e4f4095b2d084f2ba92b710b97
|
1 year ago |
|
Andrew Kryczka
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3e7fc88167 |
add WriteBatch::Release() (#11482)
Summary: Together with the existing constructor, `explicit WriteBatch(std::string&& rep)`, this enables transferring `WriteBatch` via its `std::string` representation. Associated info like KV checksums are dropped but the caller can use `WriteBatch::VerifyChecksum()` before taking ownership if needed. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11482 Reviewed By: cbi42 Differential Revision: D46233884 Pulled By: ajkr fbshipit-source-id: 6bc64a6e75fb7bbf61d08c09520fc3705a7b44d8 |
1 year ago |
|
Soli
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de1dd4ca19 |
Tweak on IsTrivialMove() (#11467)
Summary: `output_level_` and `number_levels_` are not changing in iteration of `inputs_` files. Moving the check out of `for` loop could slightly improve performance. It is easier to review when ignore whitespace changes. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11467 Reviewed By: cbi42 Differential Revision: D46155962 Pulled By: ajkr fbshipit-source-id: 45ec80b13152b3bed7305e6f707cb9b187d5f315 |
1 year ago |
|
Jay Huh
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81aeb15988 |
Add WaitForCompact with WaitForCompactOptions to public API (#11436)
Summary: Context: This is the first PR for WaitForCompact() Implementation with WaitForCompactOptions. In this PR, we are introducing `Status WaitForCompact(const WaitForCompactOptions& wait_for_compact_options)` in the public API. This currently utilizes the existing internal `WaitForCompact()` implementation (with default abort_on_pause = false). `abort_on_pause` has been moved to `WaitForCompactOptions&`. In the later PRs, we will introduce the following two options in `WaitForCompactOptions` 1. `bool flush = false` by default - If true, flush before waiting for compactions to finish. Must be set to true to ensure no immediate compactions (except perhaps periodic compactions) after closing and re-opening the DB. 2. `bool close_db = false` by default - If true, will also close the DB upon compactions finishing. 1. struct `WaitForCompactOptions` added to options.h and `abort_on_pause` in the internal API moved to the option struct. 2. `Status WaitForCompact(const WaitForCompactOptions& wait_for_compact_options)` introduced in `db.h` 3. Changed the internal WaitForCompact() to `WaitForCompact(const WaitForCompactOptions& wait_for_compact_options)` and checks for the `abort_on_pause` inside the option. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11436 Test Plan: Following tests added - `DBCompactionTest::WaitForCompactWaitsOnCompactionToFinish` - `DBCompactionTest::WaitForCompactAbortOnPauseAborted` - `DBCompactionTest::WaitForCompactContinueAfterPauseNotAborted` - `DBCompactionTest::WaitForCompactShutdownWhileWaiting` - `TransactionTest::WaitForCompactAbortOnPause` NOTE: `TransactionTest::WaitForCompactAbortOnPause` was added to use `StackableDB` to ensure the wrapper function is in place. Reviewed By: pdillinger Differential Revision: D45799659 Pulled By: jaykorean fbshipit-source-id: b5b58f95957f2ab47d1221dee32a61d6cdc4685b |
1 year ago |
|
Yu Zhang
|
d1ae7f6c41 |
Add support to strip / pad timestamp when writing / reading a block (#11472)
Summary: This patch adds support in `BlockBuilder` to strip user-defined timestamp from the `key` added via `Add(key, value)` and its equivalent APIs. The stripping logic is different when the key is either a user key or an internal key, so the `BlockBuilder` is created with a flag to indicate that. This patch also add support on the read path to APIs `NewIndexIterator`, `NewDataIterator` to support pad a min timestamp. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11472 Test Plan: Three test modes are added to parameterize existing tests: UserDefinedTimestampTestMode::kNone -> UDT feature is not enabled UserDefinedTimestampTestMode::kNormal -> UDT feature enabled, write / read with min timestamp UserDefinedTimestampTestMode::kStripUserDefinedTimestamps -> UDT feature enabled, write / read with min timestamp, set `persist_user_defined_timestamps` where it applies to false. The tests read/write with min timestamp so that point read and range scan can correctly read values in all three test modes. `block_test` are parameterized to run with above three test modes and some additional parameteriazation ``` make all check ./block_test --gtest_filter="P/BlockTest*" ./block_test --gtest_filter="P/IndexBlockTest*" ``` Reviewed By: ltamasi Differential Revision: D46200539 Pulled By: jowlyzhang fbshipit-source-id: 59f5d6b584639976b69c2943eba723bd47d9b3c0 |
1 year ago |
|
Hui Xiao
|
dcc6fc99f9 |
Fix StopWatch bug; Remove setting `record_read_stats` (#11474)
Summary: **Context/Summary:** - StopWatch enable stats even when `StatsLevel::kExceptTimers` is set. It's a harmless bug though since `reportTimeToHistogram()` will not report it anyway according to https://github.com/facebook/rocksdb/blob/main/include/rocksdb/statistics.h#L705 - https://github.com/facebook/rocksdb/pull/11288 should have removed logics of setting `record_read_stats = !for_compaction` as we don't differentiate `RandomAccessFileReader`'s stats behavior based on compaction or not (instead we now report stats of different IO activities including compaction to different stats). Fixing this should report more compaction related file read micros that aren't reported previously due to `for_compaction==true` Pull Request resolved: https://github.com/facebook/rocksdb/pull/11474 Test Plan: - DB bench pre vs post fix with small max_open_files Setup command `./db_ bench -db=/dev/shm/testdb/ -statistics=true -benchmarks=fillseq -key_size=32 -value_size=512 -num=5000 -write_buffer_size=655 -target_file_size_base=655 -disable_auto_compactions=true -compression_type=none -bloom_bits=3` Run command `./db_bench --open_files=1 -use_existing_db=true -db=/dev/shm/testdb2/ -statistics=true -benchmarks=compactall -key_size=32 -value_size=512 -num=5000 -write_buffer_size=655 -target_file_size_base=655 -disable_auto_compactions=true -compression_type=none -bloom_bits=3` Pre-fix ``` rocksdb.sst.read.micros P50 : 2.056175 P95 : 4.647739 P99 : 8.948475 P100 : 25.000000 COUNT : 4451 SUM : 12827 rocksdb.file.read.flush.micros P50 : 0.000000 P95 : 0.000000 P99 : 0.000000 P100 : 0.000000 COUNT : 0 SUM : 0 rocksdb.file.read.compaction.micros P50 : 2.057397 P95 : 4.625253 P99 : 8.749474 P100 : 25.000000 COUNT : 4382 SUM : 12608 rocksdb.file.read.db.open.micros P50 : 1.985294 P95 : 9.100000 P99 : 13.000000 P100 : 13.000000 COUNT : 69 SUM : 219 ``` Post-fix (with a higher `rocksdb.file.read.compaction.micros` count) ``` rocksdb.sst.read.micros P50 : 1.858968 P95 : 3.653086 P99 : 5.968000 P100 : 21.000000 COUNT : 3548 SUM : 9119 rocksdb.file.read.flush.micros P50 : 0.000000 P95 : 0.000000 P99 : 0.000000 P100 : 0.000000 COUNT : 0 SUM : 0 rocksdb.file.read.compaction.micros P50 : 1.857027 P95 : 3.627614 P99 : 5.738621 P100 : 21.000000 COUNT : 3479 SUM : 8904 rocksdb.file.read.db.open.micros P50 : 2.000000 P95 : 6.733333 P99 : 11.000000 P100 : 11.000000 COUNT : 69 SUM : 215 ``` - CI Reviewed By: ajkr Differential Revision: D46137221 Pulled By: hx235 fbshipit-source-id: e5b4ee7001af26f2ee0377bc6334f43b2a527388 |
1 year ago |
|
Peter Dillinger
|
17bc27741f |
Improve memory efficiency of many OptimisticTransactionDBs (#11439)
Summary: Currently it's easy to use a ton of memory with many small OptimisticTransactionDB instances, because each one by default allocates a million mutexes (40 bytes each on my compiler) for validating transactions. It even puts a lot of pressure on the allocator by allocating each one individually! In this change: * Create a new object and option that enables sharing these buckets of mutexes between instances. This is generally good for load balancing potential contention as various DBs become hotter or colder with txn writes. About the only cases where this sharing wouldn't make sense (e.g. each DB usually written by one thread) are cases that would be better off with OccValidationPolicy::kValidateSerial which doesn't use the buckets anyway. * Allocate the mutexes in a contiguous array, for efficiency * Add an option to ensure the mutexes are cache-aligned. In several other places we use cache-aligned mutexes but OptimisticTransactionDB historically does not. It should be a space-time trade-off the user can choose. * Provide some visibility into the memory used by the mutex buckets with an ApproximateMemoryUsage() function (also used in unit testing) * Share code with other users of "striped" mutexes, appropriate refactoring for customization & efficiency (e.g. using FastRange instead of modulus) Pull Request resolved: https://github.com/facebook/rocksdb/pull/11439 Test Plan: unit tests added. Ran sized-up versions of stress test in unit test, including a before-and-after performance test showing no consistent difference. (NOTE: OptimisticTransactionDB not currently covered by db_stress!) Reviewed By: ltamasi Differential Revision: D45796393 Pulled By: pdillinger fbshipit-source-id: ae2b3a26ad91ceeec15debcdc63ff48df6736a54 |
2 years ago |
|
rogertyang
|
28bf7ba77d |
remove unnecessary code in super version getter (#11452)
Summary: Do not bother comparing the version of the local super version handle with the global one. An inequality comparison result indicates nothing but a spurious obsoleteness. It only happens when the writer has increased the `ColumnFamilyData::super_version_number_`( |
2 years ago |
|
Yu Zhang
|
11ebddb1d4 |
Add utils to use for handling user defined timestamp size record in WAL (#11451)
Summary: Add a util method `HandleWriteBatchTimestampSizeDifference` to handle a `WriteBatch` read from WAL log when user-defined timestamp size record is written and read. Two check modes are added: `kVerifyConsistency` that just verifies the recorded timestamp size are consistent with the running ones. This mode is to be used by `db_impl_secondary` for opening a DB as secondary instance. It will also be used by `db_impl_open` before the user comparator switch support is added to make a column switch between enabling/disable UDT feature. The other mode `kReconcileInconsistency` will be used by `db_impl_open` later when user comparator can be changed. Another change is to extract a method `CollectColumnFamilyIdsFromWriteBatch` in db_secondary_impl.h into its standalone util file so it can be shared. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11451 Test Plan: ``` make check ./udt_util_test ``` Reviewed By: ltamasi Differential Revision: D45894386 Pulled By: jowlyzhang fbshipit-source-id: b96790777f154cddab6d45d9ba2e5d20ebc6fe9d |
2 years ago |
|
Peter Dillinger
|
39f5846ec7 |
Much better stats for seeks and prefix filtering (#11460)
Summary: We want to know more about opportunities for better range filters, and the effectiveness of our own range filters. Currently the stats are very limited, essentially logging just hits and misses against prefix filters for range scans in BLOOM_FILTER_PREFIX_* without tracking the false positive rate. Perhaps confusingly, when prefix filters are used for point queries, the stats are currently going into the non-PREFIX tickers. This change does several things: * Introduce new stat tickers for seeks and related filtering, \*LEVEL_SEEK\* * Most importantly, allows us to see opportunities for range filtering. Specifically, we can count how many times a seek in an SST file accesses at least one data block, and how many times at least one value() is then accessed. If a data block was accessed but no value(), we can generally assume that the key(s) seen was(were) not of interest so could have been filtered with the right kind of filter, avoiding the data block access. * We can get the same level of detail when a filter (for now, prefix Bloom/ribbon) is used, or not. Specifically, we can infer a false positive rate for prefix filters (not available before) from the seek "false positive" rate: when a data block is accessed but no value() is called. (There can be other explanations for a seek false positive, but in typical iterator usage it would indicate a filter false positive.) * For efficiency, I wanted to avoid making additional calls to the prefix extractor (or key comparisons, etc.), which would be required if we wanted to more precisely detect filter false positives. I believe that instrumenting value() is the best balance of efficiency vs. accurately measuring what we are often interested in. * The stats are divided between last level and non-last levels, to help understand potential tiered storage use cases. * The old BLOOM_FILTER_PREFIX_* stats have a different meaning: no longer referring to iterators but to point queries using prefix filters. BLOOM_FILTER_PREFIX_TRUE_POSITIVE is added for computing the prefix false positive rate on point queries, which can be due to filter false positives as well as different keys with the same prefix. * Similarly, the non-PREFIX BLOOM_FILTER stats are now for whole key filtering only. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11460 Test Plan: unit tests updated, including updating many to pop the stat value since last read to improve test readability and maintainability. Performance test shows a consistent small improvement with these changes, both with clang and with gcc. CPU profile indicates that RecordTick is using less CPU, and this makes sense at least for a high filter miss rate. Before, we were recording two ticks per filter miss in iterators (CHECKED & USEFUL) and now recording just one (FILTERED). Create DB with ``` TEST_TMPDIR=/dev/shm ./db_bench -benchmarks=fillrandom -num=10000000 -disable_wal=1 -write_buffer_size=30000000 -bloom_bits=8 -compaction_style=2 -fifo_compaction_max_table_files_size_mb=10000 -fifo_compaction_allow_compaction=0 -prefix_size=8 ``` And run simultaneous before&after with ``` TEST_TMPDIR=/dev/shm ./db_bench -readonly -benchmarks=seekrandom[-X1000] -num=10000000 -bloom_bits=8 -compaction_style=2 -fifo_compaction_max_table_files_size_mb=10000 -fifo_compaction_allow_compaction=0 -prefix_size=8 -seek_nexts=1 -duration=20 -seed=43 -threads=8 -cache_size=1000000000 -statistics ``` Before: seekrandom [AVG 275 runs] : 189680 (± 222) ops/sec; 18.4 (± 0.0) MB/sec After: seekrandom [AVG 275 runs] : 197110 (± 208) ops/sec; 19.1 (± 0.0) MB/sec Reviewed By: ajkr Differential Revision: D46029177 Pulled By: pdillinger fbshipit-source-id: cdace79a2ea548d46c5900b068c5b7c3a02e5822 |
2 years ago |
|
Peter Dillinger
|
4067acabca |
Compatibility step for separating BlockCache and GeneralCache APIs (#11450)
Summary: Add two type aliases for Cache: BlockCache and GeneralCache, and add LRUCacheOptions::MakeSharedGeneralCache(). This will ease upgrade to an intended future change to separate the cache API between block cache and other (general) uses, including row cache. Separating the APIs will make it easier to expose more details of block caching for customization. For example, it would be nice to pass the file unique ID and offset as the logical cache key instead of using a Slice, which could facilitate some file-specific customizations in block cache. This would also make it clear that HyperClockCache is not usable as a general cache, because it can only deal with fixed-size block cache keys. block_cache, row_cache, and blob_cache are the uses of Cache in the public API. blob_cache should be able to use BlockCache while row_cache is a GeneralCache user, as its keys are of arbitrary size. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11450 Test Plan: see updated unit test. Reviewed By: anand1976 Differential Revision: D45882067 Pulled By: pdillinger fbshipit-source-id: ff5d9f0b644f87ae337a29a7728ce3ed07b2a4b2 |
2 years ago |
|
mayue.fight
|
8d8eb0e77e |
Support Clip DB to KeyRange (#11379)
Summary: This PR is part of the request https://github.com/facebook/rocksdb/issues/11317. (Another part is https://github.com/facebook/rocksdb/pull/11378) ClipDB() will clip the entries in the CF according to the range [begin_key, end_key). All the entries outside this range will be completely deleted (including tombstones). This feature is mainly used to ensure that there is no overlapping Key when calling CreateColumnFamilyWithImports() to import multiple CFs. When Calling ClipDB [begin, end), there are the following steps 1. Quickly and directly delete files without overlap DeleteFilesInRanges(nullptr, begin) + DeleteFilesInRanges(end, nullptr) 2. Delete the Key outside the range Delete[smallest_key, begin) + Delete[end, largest_key] 3. Delete the tombstone through Manul Compact CompactRange(option, nullptr, nullptr) Pull Request resolved: https://github.com/facebook/rocksdb/pull/11379 Reviewed By: ajkr Differential Revision: D45840358 Pulled By: cbi42 fbshipit-source-id: 54152e8a45fd8ede137f99787eb252f0b51440a4 |
2 years ago |
|
Jay Huh
|
586d78b31e |
Remove wait_unscheduled from waitForCompact internal API (#11443)
Summary: Context: In pull request https://github.com/facebook/rocksdb/issues/11436, we are introducing a new public API `waitForCompact(const WaitForCompactOptions& wait_for_compact_options)`. This API invokes the internal implementation `waitForCompact(bool wait_unscheduled=false)`. The unscheduled parameter indicates the compactions that are not yet scheduled but are required to process items in the queue. In certain cases, we are unable to wait for compactions, such as during a shutdown or when background jobs are paused. It is important to return the appropriate status in these scenarios. For all other cases, we should wait for all compaction and flush jobs, including the unscheduled ones. The primary purpose of this new API is to wait until the system has resolved its compaction debt. Currently, the usage of `wait_unscheduled` is limited to test code. This pull request eliminates the usage of wait_unscheduled. The internal `waitForCompact()` API now waits for unscheduled compactions unless the db is undergoing a shutdown. In the event of a shutdown, the API returns `Status::ShutdownInProgress()`. Additionally, a new parameter, `abort_on_pause`, has been introduced with a default value of `false`. This parameter addresses the possibility of waiting indefinitely for unscheduled jobs if `PauseBackgroundWork()` was called before `waitForCompact()` is invoked. By setting `abort_on_pause` to `true`, the API will immediately return `Status::Aborted`. Furthermore, all tests that previously called `waitForCompact(true)` have been fixed. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11443 Test Plan: Existing tests that involve a shutdown in progress: - DBCompactionTest::CompactRangeShutdownWhileDelayed - DBTestWithParam::PreShutdownMultipleCompaction - DBTestWithParam::PreShutdownCompactionMiddle Reviewed By: pdillinger Differential Revision: D45923426 Pulled By: jaykorean fbshipit-source-id: 7dc93fe6a6841a7d9d2d72866fa647090dba8eae |
2 years ago |
|
Peter Dillinger
|
206fdea3d9 |
Change internal headers with duplicate names (#11408)
Summary: In IDE navigation I find it annoying that there are two statistics.h files (etc.) and often land on the wrong one. Here I migrate several headers to use the blah.h <- blah_impl.h <- blah.cc idiom. Although clang-format wants "blah.h" to be the top include for "blah.cc", I think overall this is an improvement. No public API changes. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11408 Test Plan: existing tests Reviewed By: ltamasi Differential Revision: D45456696 Pulled By: pdillinger fbshipit-source-id: 809d931253f3272c908cf5facf7e1d32fc507373 |
2 years ago |
|
Andrew Kryczka
|
fb636f2498 |
Fix write stall stats dump format (#11445)
Summary: I noticed in https://github.com/facebook/rocksdb/issues/11426 there is a missing line break. Before this PR the output looked like ``` $ ./db_bench -stats_per_interval=1 -stats_interval=100000 ... Write Stall (count): cf-l0-file-count-limit-delays-with-ongoing-compaction: 0, cf-l0-file-count-limit-stops-with-ongoing-compaction: 0, l0-file-count-limit-delays: 0, l0-file-count-limit-stops: 0, memtable-limit-delays: 0, memtable-limit-stops: 0, pending-compaction-bytes-delays: 0, pending-compaction-bytes-stops: 0, total-delays: 0, total-stops: 0, Block cache LRUCache@0x7f8695831b50#2766536 capacity: 32.00 MB seed: 1155354975 usage: 0.09 KB table_size: 1024 occupancy: 1 collections: 1 last_copies: 0 last_secs: 9.3e-05 secs_since: 2 ... Write Stall (count): write-buffer-manager-limit-stops: 0, num-running-compactions: 0 ... ``` After this PR it looks like ``` $ ./db_bench -stats_per_interval=1 -stats_interval=100000 ... Write Stall (count): cf-l0-file-count-limit-delays-with-ongoing-compaction: 0, cf-l0-file-count-limit-stops-with-ongoing-compaction: 0, l0-file-count-limit-delays: 0, l0-file-count-limit-stops: 0, memtable-limit-delays: 0, memtable-limit-stops: 0, pending-compaction-bytes-delays: 0, pending-compaction-bytes-stops: 0, total-delays: 0, total-stops: 0 Block cache LRUCache@0x7f8e0d231b50#2736585 capacity: 32.00 MB seed: 920433955 usage: 0.09 KB table_size: 1024 occupancy: 1 collections: 1 last_copies: 1 last_secs: 6.5e-05 secs_since: 4 ... Write Stall (count): write-buffer-manager-limit-stops: 0 num-running-compactions: 0 ... ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/11445 Reviewed By: hx235 Differential Revision: D45844752 Pulled By: ajkr fbshipit-source-id: 1c708cb05b6e270922ac2fa95f5d011f273347eb |
2 years ago |
|
anand76
|
2084cdf237 |
Delete temp OPTIONS file on failure to write it (#11423)
Summary: When the DB is opened, RocksDB creates a temp OPTIONS file, writes the current options to it, and renames it. In case of a failure, the temp file is left behind, and is not deleted by PurgeObsoleteFiles(). Fix this by explicitly deleting the temp file if writing to it or renaming it fails. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11423 Test Plan: Add a unit test Reviewed By: akankshamahajan15 Differential Revision: D45540454 Pulled By: anand1976 fbshipit-source-id: 47facdc30d8cc5667036312d04b21d3fc253c92e |
2 years ago |
|
Andrew Kryczka
|
113f3250f1 |
Add block checksum mismatch ticker stat (#11438)
Summary: Added a ticker stat, `BLOCK_CHECKSUM_MISMATCH_COUNT`, to count how many block checksum verifications detected a mismatch. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11438 Test Plan: new unit test Reviewed By: pdillinger Differential Revision: D45788179 Pulled By: ajkr fbshipit-source-id: e2b44eba7c23b3e110ebe69eaa78a710dec2590f |
2 years ago |
|
Yu Zhang
|
47235dda9e |
Add support in log writer and reader for a user-defined timestamp size record (#11433)
Summary: This patch adds support to write and read a user-defined timestamp size record in log writer and log reader. It will be used by WAL logs to persist the user-defined timestamp format for subsequent WriteBatch records. Reading and writing UDT sizes for WAL logs are not included in this patch. It will be in a follow up. The syntax for the record is: at write time, one such record is added when log writer encountered any non-zero UDT size it hasn't recorded so far. At read time, all such records read up to a point are accumulated and applicable to all subsequent WriteBatch records. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11433 Test Plan: ``` make clean && make -j32 all ./log_test --gtest_filter="*WithTimestampSize*" ``` Reviewed By: ltamasi Differential Revision: D45678708 Pulled By: jowlyzhang fbshipit-source-id: b770c8f45bb7b9383b14aac9f22af781304fb41d |
2 years ago |
|
Changyu Bi
|
8827cd0618 |
Support compacting files to different temperatures in FIFO compaction (#11428)
Summary: - Add a new option `CompactionOptionsFIFO::file_temperature_age_thresholds` that allows user to specify age thresholds for compacting files to different temperatures. File temperature can be used to store files in different storage media. The new options allows specifying multiple temperature-age pairs. The option uses struct for a temperature-age pair to use the existing parsing functionality to make the option dynamically settable. - Deprecate the old option `age_for_warm` that was added for a similar purpose. - Compaction score calculation logic is updated to check if a file needs to be compacted to change its temperature. - Some refactoring is done in `FIFOCompactionPicker::PickTemperatureChangeCompaction`. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11428 Test Plan: adapted unit tests that were for `age_for_warm` to this new option. Reviewed By: ajkr Differential Revision: D45611412 Pulled By: cbi42 fbshipit-source-id: 2dc384841f61cc04abb9681e31aa2de0f0b06106 |
2 years ago |
|
Peter Dillinger
|
f4a02f2c52 |
Add hash_seed to Caches (#11391)
Summary: See motivation and description in new ShardedCacheOptions::hash_seed option. Updated db_bench so that its seed param is used for the cache hash seed. Made its code more safe to ensure seed is set before use. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11391 Test Plan: unit tests added / updated **Performance** - no discernible difference seen running cache_bench repeatedly before & after. With lru_cache and hyper_clock_cache. Reviewed By: hx235 Differential Revision: D45557797 Pulled By: pdillinger fbshipit-source-id: 40bf4da6d66f9d41a8a0eb8e5cf4246a4aa07934 |
2 years ago |
|
akankshamahajan
|
6ba4717f35 |
Fix build error: variable 'base_level' may be uninitialized (#11435)
Summary:
Fix build error: variable 'base_level' may be uninitialized
```
db_impl_compaction_flush.cc:1195:21: error: variable 'base_level' may be uninitialized when used here [-Werror,-Wconditional-uninitialized]
level = base_level;
```
^~~~~~~~~~
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11435
Test Plan: CircleCI jobs
Reviewed By: cbi42
Differential Revision: D45708176
Pulled By: akankshamahajan15
fbshipit-source-id: 851b1205b22b63d728495e5735fa91b0ad8e012b
|
2 years ago |
|
Hui Xiao
|
8f763bdeab |
Record and use the tail size to prefetch table tail (#11406)
Summary: **Context:** We prefetch the tail part of a SST file (i.e, the blocks after data blocks till the end of the file) during each SST file open in hope to prefetch all the stuff at once ahead of time for later read e.g, footer, meta index, filter/index etc. The existing approach to estimate the tail size to prefetch is through `TailPrefetchStats` heuristics introduced in https://github.com/facebook/rocksdb/pull/4156, which has caused small reads in unlucky case (e.g, small read into the tail buffer during table open in thread 1 under the same BlockBasedTableFactory object can make thread 2's tail prefetching use a small size that it shouldn't) and is hard to debug. Therefore we decide to record the exact tail size and use it directly to prefetch tail of the SST instead of relying heuristics. **Summary:** - Obtain and record in manifest the tail size in `BlockBasedTableBuilder::Finish()` - For backward compatibility, we fall back to TailPrefetchStats and last to simple heuristics that the tail size is a linear portion of the file size - see PR conversation for more. - Make`tail_start_offset` part of the table properties and deduct tail size to record in manifest for external files (e.g, file ingestion, import CF) and db repair (with no access to manifest). Pull Request resolved: https://github.com/facebook/rocksdb/pull/11406 Test Plan: 1. New UT 2. db bench Note: db bench on /tmp/ where direct read is supported is too slow to finish and the default pinning setting in db bench is not helpful to profile # sst read of Get. Therefore I hacked the following to obtain the following comparison. ``` diff --git a/table/block_based/block_based_table_reader.cc b/table/block_based/block_based_table_reader.cc index bd5669f0f..791484c1f 100644 --- a/table/block_based/block_based_table_reader.cc +++ b/table/block_based/block_based_table_reader.cc @@ -838,7 +838,7 @@ Status BlockBasedTable::PrefetchTail( &tail_prefetch_size); // Try file system prefetch - if (!file->use_direct_io() && !force_direct_prefetch) { + if (false && !file->use_direct_io() && !force_direct_prefetch) { if (!file->Prefetch(prefetch_off, prefetch_len, ro.rate_limiter_priority) .IsNotSupported()) { prefetch_buffer->reset(new FilePrefetchBuffer( diff --git a/tools/db_bench_tool.cc b/tools/db_bench_tool.cc index ea40f5fa0..39a0ac385 100644 --- a/tools/db_bench_tool.cc +++ b/tools/db_bench_tool.cc @@ -4191,6 +4191,8 @@ class Benchmark { std::shared_ptr<TableFactory>(NewCuckooTableFactory(table_options)); } else { BlockBasedTableOptions block_based_options; + block_based_options.metadata_cache_options.partition_pinning = + PinningTier::kAll; block_based_options.checksum = static_cast<ChecksumType>(FLAGS_checksum_type); if (FLAGS_use_hash_search) { ``` Create DB ``` ./db_bench --bloom_bits=3 --use_existing_db=1 --seed=1682546046158958 --partition_index_and_filters=1 --statistics=1 -db=/dev/shm/testdb/ -benchmarks=readrandom -key_size=3200 -value_size=512 -num=1000000 -write_buffer_size=6550000 -disable_auto_compactions=false -target_file_size_base=6550000 -compression_type=none ``` ReadRandom ``` ./db_bench --bloom_bits=3 --use_existing_db=1 --seed=1682546046158958 --partition_index_and_filters=1 --statistics=1 -db=/dev/shm/testdb/ -benchmarks=readrandom -key_size=3200 -value_size=512 -num=1000000 -write_buffer_size=6550000 -disable_auto_compactions=false -target_file_size_base=6550000 -compression_type=none ``` (a) Existing (Use TailPrefetchStats for tail size + use seperate prefetch buffer in PartitionedFilter/IndexReader::CacheDependencies()) ``` rocksdb.table.open.prefetch.tail.hit COUNT : 3395 rocksdb.sst.read.micros P50 : 5.655570 P95 : 9.931396 P99 : 14.845454 P100 : 585.000000 COUNT : 999905 SUM : 6590614 ``` (b) This PR (Record tail size + use the same tail buffer in PartitionedFilter/IndexReader::CacheDependencies()) ``` rocksdb.table.open.prefetch.tail.hit COUNT : 14257 rocksdb.sst.read.micros P50 : 5.173347 P95 : 9.015017 P99 : 12.912610 P100 : 228.000000 COUNT : 998547 SUM : 5976540 ``` As we can see, we increase the prefetch tail hit count and decrease SST read count with this PR 3. Test backward compatibility by stepping through reading with post-PR code on a db generated pre-PR. Reviewed By: pdillinger Differential Revision: D45413346 Pulled By: hx235 fbshipit-source-id: 7d5e36a60a72477218f79905168d688452a4c064 |
2 years ago |
|
Changyu Bi
|
a11f1e12ca |
Fix flaky test `DBTestUniversalManualCompactionOutputPathId.ManualCompactionOutputPathId` (#11412)
Summary: the test is flaky when compiled with `make -j56 COERCE_CONTEXT_SWITCH=1 ./db_universal_compaction_test`. The cause is that a manual compaction `CompactRange()` can finish and return before obsolete files are deleted. One reason for this is that a manual compaction waits until `manual.done` is set here |
2 years ago |
|
clundro
|
50b33ebb1b |
remove redundant move (#11418)
Summary:
when I use g++-13 to exec the `make all` command, the output throws the warnings.
```
db/compaction/compaction_job_test.cc: In member function ‘void rocksdb::CompactionJobTestBase::AddMockFile(const rocksdb::mock::KVVector&, int)’:
db/compaction/compaction_job_test.cc:376:57: error: redundant move in initialization [-Werror=redundant-move]
376 | env_, GenerateFileName(file_number), std::move(contents)));
| ~~~~~~~~~^~~~~~~~~~
db/compaction/compaction_job_test.cc:375:7: note: in expansion of macro ‘EXPECT_OK’
375 | EXPECT_OK(mock_table_factory_->CreateMockTable(
| ^~~~~~~~~
db/compaction/compaction_job_test.cc:376:57: note: remove ‘std::move’ call
376 | env_, GenerateFileName(file_number), std::move(contents)));
| ~~~~~~~~~^~~~~~~~~~
db/compaction/compaction_job_test.cc:375:7: note: in expansion of macro ‘EXPECT_OK’
375 | EXPECT_OK(mock_table_factory_->CreateMockTable(
| ^~~~~~~~~
cc1plus: all warnings being treated as errors
make: *** [Makefile:2507: db/compaction/compaction_job_test.o] Error 1
```
and I also add some `(void)unused_variable` statements because of the cmake argument `-Wunused-but-set-variable -Wunused-but-set-variable`
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11418
Reviewed By: akankshamahajan15
Differential Revision: D45528223
Pulled By: ajkr
fbshipit-source-id: fee1a77c30039a56b481de953f0a834cc788abbc
|
2 years ago |
|
leipeng
|
a475e9f746 |
DBIter::FindValueForCurrentKey: remove unused Status s (#11394)
Summary: This PR remove a historical useless code Pull Request resolved: https://github.com/facebook/rocksdb/pull/11394 Reviewed By: ajkr Differential Revision: D45506226 Pulled By: akankshamahajan15 fbshipit-source-id: 32c98627100c9ad131bf65c4a1fe97ab61502daf |
2 years ago |
|
anand76
|
03a892a9fb |
Delete empty WAL files on reopen (#11409)
Summary: When a DB is opened, RocksDB creates an empty WAL file. When the DB is reopened and the WAL is empty, the min log number to keep is not advanced until a memtable flush happens. If a process crashes soon after reopening the DB, its likely that no memtable flush would have happened, which means the empty WAL file is not deleted. In a crash loop scenario, this leads to empty WAL files accumulating. Fix this by ensuring the min log number is advanced if the WAL is empty. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11409 Test Plan: Add a unit test Reviewed By: ajkr Differential Revision: D45281685 Pulled By: anand1976 fbshipit-source-id: 0225877c613e65ffb30972a0051db2830105423e |
2 years ago |
|
Peter Dillinger
|
41a7fbf758 |
Avoid long parameter lists configuring Caches (#11386)
Summary: For better clarity, encouraging more options explicitly specified using fields rather than positionally via constructor parameter lists. Simplifies code maintenance as new fields are added. Deprecate some cases of the confusing pattern of NewWhatever() functions returning shared_ptr. Net reduction of about 70 source code lines (including comments). Pull Request resolved: https://github.com/facebook/rocksdb/pull/11386 Test Plan: existing tests Reviewed By: ajkr Differential Revision: D45059075 Pulled By: pdillinger fbshipit-source-id: d53fa09b268024f9c55254bb973b6c69feebf41a |
2 years ago |
|
Changyu Bi
|
62fc15f009 |
Block per key-value checksum (#11287)
Summary: add option `block_protection_bytes_per_key` and implementation for block per key-value checksum. The main changes are 1. checksum construction and verification in block.cc/h 2. pass the option `block_protection_bytes_per_key` around (mainly for methods defined in table_cache.h) 3. unit tests/crash test updates Tests: * Added unit tests * Crash test: `python3 tools/db_crashtest.py blackbox --simple --block_protection_bytes_per_key=1 --write_buffer_size=1048576` Follow up (maybe as a separate PR): make sure corruption status returned from BlockIters are correctly handled. Performance: Turning on block per KV protection has a non-trivial negative impact on read performance and costs additional memory. For memory, each block includes additional 24 bytes for checksum-related states beside checksum itself. For CPU, I set up a DB of size ~1.2GB with 5M keys (32 bytes key and 200 bytes value) which compacts to ~5 SST files (target file size 256 MB) in L6 without compression. I tested readrandom performance with various block cache size (to mimic various cache hit rates): ``` SETUP make OPTIMIZE_LEVEL="-O3" USE_LTO=1 DEBUG_LEVEL=0 -j32 db_bench ./db_bench -benchmarks=fillseq,compact0,waitforcompaction,compact,waitforcompaction -write_buffer_size=33554432 -level_compaction_dynamic_level_bytes=true -max_background_jobs=8 -target_file_size_base=268435456 --num=5000000 --key_size=32 --value_size=200 --compression_type=none BENCHMARK ./db_bench --use_existing_db -benchmarks=readtocache,readrandom[-X10] --num=5000000 --key_size=32 --disable_auto_compactions --reads=1000000 --block_protection_bytes_per_key=[0|1] --cache_size=$CACHESIZE The readrandom ops/sec looks like the following: Block cache size: 2GB 1.2GB * 0.9 1.2GB * 0.8 1.2GB * 0.5 8MB Main 240805 223604 198176 161653 139040 PR prot_bytes=0 238691 226693 200127 161082 141153 PR prot_bytes=1 214983 193199 178532 137013 108211 prot_bytes=1 vs -10% -15% -10.8% -15% -23% prot_bytes=0 ``` The benchmark has a lot of variance, but there was a 5% to 25% regression in this benchmark with different cache hit rates. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11287 Reviewed By: ajkr Differential Revision: D43970708 Pulled By: cbi42 fbshipit-source-id: ef98d898b71779846fa74212b9ec9e08b7183940 |
2 years ago |
|
leipeng
|
40d69b59ad |
DBImpl::MultiGet: delete unused var `superversions_to_delete` (#11395)
Summary: In db_impl.cc DBImpl::MultiGet: delete unused var `superversions_to_delete` Pull Request resolved: https://github.com/facebook/rocksdb/pull/11395 Reviewed By: ajkr Differential Revision: D45240896 Pulled By: cbi42 fbshipit-source-id: 0fff99b0d794b6f6d4aadee6036bddd6cb19eb31 |
2 years ago |
|
Peter Dillinger
|
fb63d9b4ee |
Fix compression tests when snappy not available (#11396)
Summary: Tweak some bounds and things, and reduce risk of surprise results by running on all supported compressions (mostly). Also improves the precise compressibility of CompressibleString by using RandomBinaryString. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11396 Test Plan: updated tests Reviewed By: ltamasi Differential Revision: D45211938 Pulled By: pdillinger fbshipit-source-id: 9dc1dd8574a60a9364efe18558be66d31a35598b |
2 years ago |
|
Peter Dillinger
|
d79be3dca2 |
Changes and enhancements to compression stats, thresholds (#11388)
Summary: ## Option API updates * Add new CompressionOptions::max_compressed_bytes_per_kb, which corresponds to 1024.0 / min allowable compression ratio. This avoids the hard-coded minimum ratio of 8/7. * Remove unnecessary constructor for CompressionOptions. * Document undocumented CompressionOptions. Use idiom for default values shown clearly in one place (not precariously repeated). ## Stat API updates * Deprecate the BYTES_COMPRESSED, BYTES_DECOMPRESSED histograms. Histograms incur substantial extra space & time costs compared to tickers, and the distribution of uncompressed data block sizes tends to be uninteresting. If we're interested in that distribution, I don't see why it should be limited to blocks stored as compressed. * Deprecate the NUMBER_BLOCK_NOT_COMPRESSED ticker, because the name is very confusing. * New or existing tickers relevant to compression: * BYTES_COMPRESSED_FROM * BYTES_COMPRESSED_TO * BYTES_COMPRESSION_BYPASSED * BYTES_COMPRESSION_REJECTED * COMPACT_WRITE_BYTES + FLUSH_WRITE_BYTES (both existing) * NUMBER_BLOCK_COMPRESSED (existing) * NUMBER_BLOCK_COMPRESSION_BYPASSED * NUMBER_BLOCK_COMPRESSION_REJECTED * BYTES_DECOMPRESSED_FROM * BYTES_DECOMPRESSED_TO We can compute a number of things with these stats: * "Successful" compression ratio: BYTES_COMPRESSED_FROM / BYTES_COMPRESSED_TO * Compression ratio of data on which compression was attempted: (BYTES_COMPRESSED_FROM + BYTES_COMPRESSION_REJECTED) / (BYTES_COMPRESSED_TO + BYTES_COMPRESSION_REJECTED) * Compression ratio of data that could be eligible for compression: (BYTES_COMPRESSED_FROM + X) / (BYTES_COMPRESSED_TO + X) where X = BYTES_COMPRESSION_REJECTED + NUMBER_BLOCK_COMPRESSION_REJECTED * Overall SST compression ratio (compression disabled vs. actual): (Y - BYTES_COMPRESSED_TO + BYTES_COMPRESSED_FROM) / Y where Y = COMPACT_WRITE_BYTES + FLUSH_WRITE_BYTES Keeping _REJECTED separate from _BYPASSED helps us to understand "wasted" CPU time in compression. ## BlockBasedTableBuilder Various small refactorings, optimizations, and name clean-ups. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11388 Test Plan: unit tests added * `options_settable_test.cc`: use non-deprecated idiom for configuring CompressionOptions from string. The old idiom is tested elsewhere and does not need to be updated to support the new field. Reviewed By: ajkr Differential Revision: D45128202 Pulled By: pdillinger fbshipit-source-id: 5a652bf5c022b7ec340cf79018cccf0686962803 |
2 years ago |
|
Hui Xiao
|
151242ce46 |
Group rocksdb.sst.read.micros stat by IOActivity flush and compaction (#11288)
Summary:
**Context:**
The existing stat rocksdb.sst.read.micros does not reflect each of compaction and flush cases but aggregate them, which is not so helpful for us to understand IO read behavior of each of them.
**Summary**
- Update `StopWatch` and `RandomAccessFileReader` to record `rocksdb.sst.read.micros` and `rocksdb.file.{flush/compaction}.read.micros`
- Fixed the default histogram in `RandomAccessFileReader`
- New field `ReadOptions/IOOptions::io_activity`; Pass `ReadOptions` through paths under db open, flush and compaction to where we can prepare `IOOptions` and pass it to `RandomAccessFileReader`
- Use `thread_status_util` for assertion in `DbStressFSWrapper` for continuous testing on we are passing correct `io_activity` under db open, flush and compaction
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11288
Test Plan:
- **Stress test**
- **Db bench 1: rocksdb.sst.read.micros COUNT ≈ sum of rocksdb.file.read.flush.micros's and rocksdb.file.read.compaction.micros's.** (without blob)
- May not be exactly the same due to `HistogramStat::Add` only guarantees atomic not accuracy across threads.
```
./db_bench -db=/dev/shm/testdb/ -statistics=true -benchmarks="fillseq" -key_size=32 -value_size=512 -num=50000 -write_buffer_size=655 -target_file_size_base=655 -disable_auto_compactions=false -compression_type=none -bloom_bits=3 (-use_plain_table=1 -prefix_size=10)
```
```
// BlockBasedTable
rocksdb.sst.read.micros P50 : 2.009374 P95 : 4.968548 P99 : 8.110362 P100 : 43.000000 COUNT : 40456 SUM : 114805
rocksdb.file.read.flush.micros P50 : 1.871841 P95 : 3.872407 P99 : 5.540541 P100 : 43.000000 COUNT : 2250 SUM : 6116
rocksdb.file.read.compaction.micros P50 : 2.023109 P95 : 5.029149 P99 : 8.196910 P100 : 26.000000 COUNT : 38206 SUM : 108689
// PlainTable
Does not apply
```
- **Db bench 2: performance**
**Read**
SETUP: db with 900 files
```
./db_bench -db=/dev/shm/testdb/ -benchmarks="fillseq" -key_size=32 -value_size=512 -num=50000 -write_buffer_size=655 -disable_auto_compactions=true -target_file_size_base=655 -compression_type=none
```run till convergence
```
./db_bench -seed=1678564177044286 -use_existing_db=true -db=/dev/shm/testdb -benchmarks=readrandom[-X60] -statistics=true -num=1000000 -disable_auto_compactions=true -compression_type=none -bloom_bits=3
```
Pre-change
`readrandom [AVG 60 runs] : 21568 (± 248) ops/sec`
Post-change (no regression, -0.3%)
`readrandom [AVG 60 runs] : 21486 (± 236) ops/sec`
**Compaction/Flush**run till convergence
```
./db_bench -db=/dev/shm/testdb2/ -seed=1678564177044286 -benchmarks="fillseq[-X60]" -key_size=32 -value_size=512 -num=50000 -write_buffer_size=655 -disable_auto_compactions=false -target_file_size_base=655 -compression_type=none
rocksdb.sst.read.micros COUNT : 33820
rocksdb.sst.read.flush.micros COUNT : 1800
rocksdb.sst.read.compaction.micros COUNT : 32020
```
Pre-change
`fillseq [AVG 46 runs] : 1391 (± 214) ops/sec; 0.7 (± 0.1) MB/sec`
Post-change (no regression, ~-0.4%)
`fillseq [AVG 46 runs] : 1385 (± 216) ops/sec; 0.7 (± 0.1) MB/sec`
Reviewed By: ajkr
Differential Revision: D44007011
Pulled By: hx235
fbshipit-source-id: a54c89e4846dfc9a135389edf3f3eedfea257132
|
2 years ago |
|
Andrew Kryczka
|
0a774a102f |
Clarify `SstFileWriter::DeleteRange()` ordering requirements (#11390)
Summary: As titled Pull Request resolved: https://github.com/facebook/rocksdb/pull/11390 Reviewed By: cbi42 Differential Revision: D45148830 Pulled By: ajkr fbshipit-source-id: 9a8dfd040514bae3d8ed9e97a79cae7683f2749a |
2 years ago |
|
Changyu Bi
|
43e9a60bb2 |
Always allow L0->L1 trivial move during manual compaction (#11375)
Summary: during manual compaction (CompactRange()), L0->L1 trivial move is disabled when only L0 overlaps with compacting key range (introduced in https://github.com/facebook/rocksdb/issues/7368 to enforce kForce* contract). This can cause large memory usage due to compaction readahead when number of L0 files is large. This PR allows L0->L1 trivial move in this case, and will do a L1 -> L1 intra-level compaction when needed (`bottommost_level_compaction` is kForce*). In brief, consider a DB with only L0 file, and user calls CompactRange(kForce, nullptr, nullptr), - before this PR, RocksDB does a L0 -> L1 compaction (disallow trivial move), - after this PR, RocksDB does a L0 -> L1 compaction (allow trivial move), and a L1 -> L1 compaction. Users can use kForceOptimized to avoid this extra L1->L1 compaction overhead when L0s are overlapping and cannot be trivial moved. This PR also fixed a bug (see previous discussion in https://github.com/facebook/rocksdb/issues/11041) where `final_output_level` of a manual compaction can be miscalculated when `level_compaction_dynamic_level_bytes=true`. This bug could cause incorrect level being moved when CompactRangeOptions::change_level is specified. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11375 Test Plan: - Added new unit tests to test that L0 -> L1 compaction allows trivial move and L1 -> L1 compaction is done when needed. Reviewed By: ajkr Differential Revision: D44943518 Pulled By: cbi42 fbshipit-source-id: e9fb770d17b163c18a623e1d1bd6b81159192708 |
2 years ago |
|
Andrew Kryczka
|
f3818948e8 |
Deflake DBWriteTest.LockWALInEffect (#11382)
Summary:
This test exhibited the following flaky failure:
```
db/db_write_test.cc:653: Failure
db_->Resume()
Corruption: Not active
```
I was able to repro it by applying the following patch to coerce a specific race condition:
```
diff --git a/db/db_write_test.cc b/db/db_write_test.cc
index d82c57376..775ba3cde 100644
--- a/db/db_write_test.cc
+++ b/db/db_write_test.cc
@@ -636,6 +636,10 @@ TEST_P(DBWriteTest, LockWALInEffect) {
ASSERT_TRUE(dbfull()->WALBufferIsEmpty());
ASSERT_OK(db_->UnlockWAL());
+ // Test thread: sleep interval: [0, 3)
+ // In this interval, the file system is active
+ sleep(3);
+
// Fail the WAL flush if applicable
fault_fs->SetFilesystemActive(false);
Status s = Put("key2", "value");
@@ -649,6 +653,11 @@ TEST_P(DBWriteTest, LockWALInEffect) {
ASSERT_OK(db_->LockWAL());
ASSERT_OK(db_->UnlockWAL());
}
+
+ // Test thread: sleep interval: [3, 6)
+ // In this interval, the file system is inactive
+ sleep(3);
+
fault_fs->SetFilesystemActive(true);
ASSERT_OK(db_->Resume());
// Writes should work again
diff --git a/db/flush_job.cc b/db/flush_job.cc
index 8193f594f..602ee2c9f 100644
--- a/db/flush_job.cc
+++ b/db/flush_job.cc
@@ -979,6 +979,10 @@ Status FlushJob::WriteLevel0Table() {
DirFsyncOptions(DirFsyncOptions::FsyncReason::kNewFileSynced));
}
TEST_SYNC_POINT_CALLBACK("FlushJob::WriteLevel0Table", &mems_);
+ // Flush thread: sleep interval: [0, 4)
+ // Upon awakening, the file system will be inactive. Then the MANIFEST
+ // update will fail.
+ sleep(4);
db_mutex_->Lock();
}
base_->Unref();
```
The fix for this scenario is explained in the code change.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11382
Reviewed By: cbi42
Differential Revision: D45027632
Pulled By: ajkr
fbshipit-source-id: 6bfa35a5781c0c080fb74e13f2b2c9f871f7effb
|
2 years ago |
|
Andrew Kryczka
|
b8555ba470 |
Deflake DBBloomFilterTest.OptimizeFiltersForHits (#11383)
Summary: In CircleCI build-linux-arm-test-full job (https://app.circleci.com/pipelines/github/facebook/rocksdb/26462/workflows/a9d39d2c-c970-4b0f-9c10-7743beb9771b/jobs/591722), this test exhibited the following flaky failure: ``` db/db_bloom_filter_test.cc:2506: Failure Expected: (TestGetTickerCount(options, BLOOM_FILTER_USEFUL)) > (65000 * 2), actual: 120558 vs 130000 ``` I ssh'd to an instance and observed it cuts memtables at slightly different points across runs. Logging in `ConcurrentArena` pointed to `try_lock()` returning false at different points across runs. This PR changes the approach to allow a fixed number of keys per memtable flush. I verified the bloom filter useful count is deterministic now even on the CircleCI ARM instance. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11383 Reviewed By: cbi42 Differential Revision: D45036829 Pulled By: ajkr fbshipit-source-id: b602dacb63955f1af09bf0ed409cde0552805a08 |
2 years ago |
|
Murali Vilayannur
|
226ee25d30 |
Block fetch CPU time counters in perf context (#11342)
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/11342 Reviewed By: ajkr Differential Revision: D45026838 Pulled By: mnv104 fbshipit-source-id: 099ed9579922b8fa6e7d3332bbb829d50ec47d91 |
2 years ago |
|
mayue.fight
|
4d72f48e57 |
Fix the wrong calculation of largest_key in import_column_family_job (#11381)
Summary: When calculating the largest_key in ImportColumnFamilyJob::GetIngestedFileInfo, only the first element of range_del_iter is calculated. If range_del_iter has multiple elements, the largest_key will be wrong Pull Request resolved: https://github.com/facebook/rocksdb/pull/11381 Reviewed By: cbi42 Differential Revision: D44981450 Pulled By: ajkr fbshipit-source-id: 584bc7da86295568a96984d2951644f289e578c7 |
2 years ago |
|
Changyu Bi
|
ba16e8eee7 |
Try to pick more files in `LevelCompactionBuilder::TryExtendNonL0TrivialMove()` (#11347)
Summary: Before this PR, in `LevelCompactionBuilder::TryExtendNonL0TrivialMove(index)`, we start from a file at index and expand the compaction input towards right to find files to trivial move. This PR adds the logic to also expand towards left. Another major change made in this PR is to not expand L0 files through `TryExtendNonL0TrivialMove()`. This happens currently when compacting L0 files to an empty output level. The condition for expanding files in `TryExtendNonL0TrivialMove()` is to check atomic boundary, which does not take into account that L0 files can overlap in key range and are not sorted in key order. So it may include more L0 files than needed and disallow a trivial move. This change is included in this PR so that we don't make it worse by always expanding L0 in both direction. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11347 Test Plan: * new unit test * Benchmark does not show obvious improvement or regression: ``` Write sequentially ./db_bench --benchmarks=fillseq --compression_type=lz4 --write_buffer_size=1000000 --num=100000000 --value_size=100 -level_compaction_dynamic_level_bytes --target_file_size_base=7340032 --max_bytes_for_level_base=16777216 Main: fillseq : 4.726 micros/op 211592 ops/sec 472.607 seconds 100000000 operations; 23.4 MB/s This PR: fillseq : 4.755 micros/op 210289 ops/sec 475.534 seconds 100000000 operations; 23.3 MB/s Write randomly ./db_bench --benchmarks=fillrandom --compression_type=lz4 --write_buffer_size=1000000 --num=100000000 --value_size=100 -level_compaction_dynamic_level_bytes --target_file_size_base=7340032 --max_bytes_for_level_base=16777216 Main: fillrandom : 16.351 micros/op 61159 ops/sec 1635.066 seconds 100000000 operations; 6.8 MB/s This PR: fillrandom : 15.798 micros/op 63298 ops/sec 1579.817 seconds 100000000 operations; 7.0 MB/s ``` Reviewed By: ajkr Differential Revision: D44645650 Pulled By: cbi42 fbshipit-source-id: 8631f3a6b3f01decbbf18c34f2b62833cb4f9733 |
2 years ago |