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11924 Commits (4aa52d89cf9cc94da6800396e06a21b2cd74a7b5)
| Author | SHA1 | Message | Date |
|---|---|---|---|
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 |
|
Andrew Kryczka
|
687a2a0d9a |
Small improvements to DBGet microbenchmark (#11498)
Summary: Follow a couple best practices: - Allowed Google benchmark to decide number of iterations. Previously we hardcoded a value, which circumvented benchmark's heuristic for iterating until the result is stable. - Made each iteration do similar work. Previously, an iteration could do different work depending if the key was found in the first, second, third, or no L0 file. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11498 Test Plan: none as I am unable to prove it is better Reviewed By: hx235 Differential Revision: D46339050 Pulled By: ajkr fbshipit-source-id: fcfc6da4111c5b3ae86d79d908afc5f61f96675b |
1 year ago |
|
Peter Dillinger
|
7a9b264f36 |
Some fixes to unreleased_history/ (#11504)
Summary: * Add a "Performance Improvements" section * Add required copyright headers Pull Request resolved: https://github.com/facebook/rocksdb/pull/11504 Test Plan: manual Reviewed By: hx235 Differential Revision: D46405128 Pulled By: pdillinger fbshipit-source-id: 4f878dfd0170d381d3051a44c13479c860e812c0 |
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:
|
1 year ago |
|
Yu Zhang
|
9f7877f246 |
Add support to strip / pad timestamp when creating / reading a block based table (#11495)
Summary: Add support to strip timestamp in block based table builder and pad timestamp in block based table reader. On the write path, use the per column family option `AdvancedColumnFamilyOptions.persist_user_defined_timestamps` to indicate whether user-defined timestamps should be stripped for all block based tables created for the column family. On the read path, added a per table `TableReadOption.user_defined_timestamps_persisted` to flag whether the user keys in the table contains user defined timestamps. This patch is mostly passing the related flags down to the block building/parsing level with the exception of handling the `first_internal_key` in `IndexValue`, which is included in the `IndexBuilder` level. The value part of range deletion entries should have a similar handling, I haven't decided where to best fit this piece of logic, I will do it in a follow up. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11495 Test Plan: Existing test `BlockBasedTableReaderTest` is parameterized to run with: 1) different UDT test modes: kNone, kNormal, kStripUserDefinedTimestamp 2) all four index types, when index type is `kTwoLevelIndexSearch`, also enables partitioned filters 3) parallel vs non-parallel compression 4) enable/disable compression dictionary. Also added tests for API `BlockBasedTableReader::NewIterator`. `PartitionedFilterBlockTest` is parameterized to run with different UDT test modes:kNone, kNormal, kStripUserDefinedTimestamp. ``` make all check ./block_based_table_reader_test ./partitioned_filter_block_test ``` Reviewed By: ltamasi Differential Revision: D46344577 Pulled By: jowlyzhang fbshipit-source-id: 93ac8542b19319d1298712b8bed908c8831ba675 |
1 year ago |
|
Changyu Bi
|
9f1ce6d804 |
Make `unreleased_history/release.sh` work on macOS (#11494)
Summary: I got the following errors when running `unreleased_history/release.sh` on my mac. This is due to mac does not have gnu version of awk and find by default. This PR updates the script to work on macOS. ``` awk: calling undefined function strftime input record number 43, file source line number 4 find: -regextype: unknown primary or operator ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/11494 Test Plan: manually run `DRY_RUN=1 unreleased_history/release.sh | less` on macOS and CentOS8 machines. Reviewed By: ajkr Differential Revision: D46328442 Pulled By: cbi42 fbshipit-source-id: a7570cd3480fcd25ac1438beb0d59fe655f9a71a |
1 year ago |
|
darionyaphet
|
68a9cd21f2 |
Support single delete help message in ldb (#11493)
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/11493 Reviewed By: jowlyzhang Differential Revision: D46325687 Pulled By: ajkr fbshipit-source-id: ebf08477f5209104aee605496d751c857f4bb0a2 |
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 |
|
Peter Dillinger
|
8848ec92dd |
Better management of unreleased HISTORY (#11481)
Summary: See new NOTE in HISTORY.md and unreleased_history/README.txt Pull Request resolved: https://github.com/facebook/rocksdb/pull/11481 Test Plan: some manual testing on my CentOS 8 system Reviewed By: jaykorean Differential Revision: D46233342 Pulled By: pdillinger fbshipit-source-id: daf59cf3dc907f450b469090dcc481a30a7d7c0d |
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 |
|
anand76
|
fcc358baf2 |
Integrate CacheReservationManager with compressed secondary cache (#11449)
Summary: This draft PR implements charging of reserved memory, for write buffers, table readers, and other purposes, proportionally to the block cache and the compressed secondary cache. The basic flow of memory reservation is maintained - clients use ```CacheReservationManager``` to request reservations, and ```CacheReservationManager``` inserts placeholder entries, i.e null value and non-zero charge, into the block cache. The ```CacheWithSecondaryAdapter``` wrapper uses its own instance of ```CacheReservationManager``` to keep track of reservations charged to the secondary cache, while the placeholder entries are inserted into the primary block cache. The design is as follows. When ```CacheWithSecondaryAdapter``` is constructed with the ```distribute_cache_res``` parameter set to true, it manages the entire memory budget across the primary and secondary cache. The secondary cache is assumed to be in memory, such as the ```CompressedSecondaryCache```. When a placeholder entry is inserted by a CacheReservationManager instance to reserve memory, the ```CacheWithSecondaryAdapter```ensures that the reservation is distributed proportionally across the primary/secondary caches. The primary block cache is initially sized to the sum of the primary cache budget + the secondary cache budget, as follows - |--------- Primary Cache Configured Capacity -----------| |---Secondary Cache Budget----|----Primary Cache Budget-----| A ```ConcurrentCacheReservationManager``` member in the ```CacheWithSecondaryAdapter```, ```pri_cache_res_```, is used to help with tracking the distribution of memory reservations. Initially, it accounts for the entire secondary cache budget as a reservation against the primary cache. This shrinks the usable capacity of the primary cache to the budget that the user originally desired. |--Reservation for Sec Cache--|-Pri Cache Usable Capacity---| When a reservation placeholder is inserted into the adapter, it is inserted directly into the primary cache. This means the entire charge of the placeholder is counted against the primary cache. To compensate and count a portion of it against the secondary cache, the secondary cache ```Deflate()``` method is called to shrink it. Since the ```Deflate()``` causes the secondary actual usage to shrink, it is reflected here by releasing an equal amount from the ```pri_cache_res_``` reservation. For example, if the pri/sec ratio is 50/50, this would be the state after placeholder insertion - |-Reservation for Sec Cache-|-Pri Cache Usable Capacity-|-R-| Likewise, when the user inserted placeholder is released, the secondary cache ```Inflate()``` method is called to grow it, and the ```pri_cache_res_``` reservation is increased by an equal amount. Other alternatives - 1. Another way of implementing this would have been to simply split the user reservation in ```CacheWithSecondaryAdapter``` into primary and secondary components. However, this would require allocating a structure to track the associated secondary cache reservation, which adds some complexity and overhead. 2. Yet another option is to implement the splitting directly in ```CacheReservationManager```. However, there are multiple instances of ```CacheReservationManager``` in a DB instance, making it complicated to keep track of them. The PR contains the following changes - 1. A new cache allocator, ```NewTieredVolatileCache()```, is defined for allocating a tiered primary block cache and compressed secondary cache. This internally allocates an instance of ```CacheWithSecondaryAdapter```. 3. New interfaces, ```Deflate()``` and ```Inflate()```, are added to the ```SecondaryCache``` interface. The default implementaion returns ```NotSupported``` with overrides in ```CompressedSecondaryCache```. 4. The ```CompressedSecondaryCache``` uses a ```ConcurrentCacheReservationManager``` instance to manage reservations done using ```Inflate()/Deflate()```. 5. The ```CacheWithSecondaryAdapter``` optionally distributes memory reservations across the primary and secondary caches. The primary cache is sized to the total memory budget (primary + secondary), and the capacity allocated to secondary cache is "reserved" against the primary cache. For any subsequent reservations, the primary cache pre-reserved capacity is adjusted. Benchmarks - Baseline ``` time ~/rocksdb_anand76/db_bench --db=/dev/shm/comp_cache_res/base --use_existing_db=true --benchmarks="readseq,readwhilewriting" --key_size=32 --value_size=1024 --num=20000000 --threads=32 --bloom_bits=10 --cache_size=30000000000 --use_compressed_secondary_cache=true --compressed_secondary_cache_size=5000000000 --duration=300 --cost_write_buffer_to_cache=true ``` ``` readseq : 3.301 micros/op 9694317 ops/sec 66.018 seconds 640000000 operations; 9763.0 MB/s readwhilewriting : 22.921 micros/op 1396058 ops/sec 300.021 seconds 418846968 operations; 1405.9 MB/s (13068999 of 13068999 found) real 6m31.052s user 152m5.660s sys 26m18.738s ``` With TieredVolatileCache ``` time ~/rocksdb_anand76/db_bench --db=/dev/shm/comp_cache_res/base --use_existing_db=true --benchmarks="readseq,readwhilewriting" --key_size=32 --value_size=1024 --num=20000000 --threads=32 --bloom_bits=10 --cache_size=30000000000 --use_compressed_secondary_cache=true --compressed_secondary_cache_size=5000000000 --duration=300 --cost_write_buffer_to_cache=true --use_tiered_volatile_cache=true ``` ``` readseq : 4.064 micros/op 7873915 ops/sec 81.281 seconds 640000000 operations; 7929.7 MB/s readwhilewriting : 20.944 micros/op 1527827 ops/sec 300.020 seconds 458378968 operations; 1538.6 MB/s (14296999 of 14296999 found) real 6m42.743s user 157m58.972s sys 33m16.671 ``` ``` readseq : 3.484 micros/op 9184967 ops/sec 69.679 seconds 640000000 operations; 9250.0 MB/s readwhilewriting : 21.261 micros/op 1505035 ops/sec 300.024 seconds 451545968 operations; 1515.7 MB/s (14101999 of 14101999 found) real 6m31.469s user 155m16.570s sys 27m47.834s ``` ToDo - 1. Add to db_stress Pull Request resolved: https://github.com/facebook/rocksdb/pull/11449 Reviewed By: pdillinger Differential Revision: D46197388 Pulled By: anand1976 fbshipit-source-id: 42d16f0254df683db4929db20d06ff26030e90df |
1 year ago |
|
Andrew Kryczka
|
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
|
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
|
23f4e9ad63 |
Move WaitForCompect() change entry to Unreleased in History file (#11479)
Summary: Context: Because of the branch cut, History change made it to the previous release. Moving entry to Unreleased Pull Request resolved: https://github.com/facebook/rocksdb/pull/11479 Test Plan: History change. Not needed. Reviewed By: pdillinger Differential Revision: D46226237 Pulled By: jaykorean fbshipit-source-id: 33e7d84a05db254d227f05d76038fc6d225dbabf |
1 year ago |
|
Jay Huh
|
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
|
e8710303d9 |
Document SyncPoint::LoadDependency (#11477)
Summary: It's easy to mix up the ordering when it's undocumented. For an example of the meaning of the order, see DBTest.ThreadStatusFlush. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11477 Test Plan: comments only Reviewed By: jaykorean Differential Revision: D46166683 Pulled By: pdillinger fbshipit-source-id: 33118ba7ef1b08eab7b077548fe2e70f2c309e3f |
2 years 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 |
|
Alan Paxton
|
93e0715fad |
Implement missing compactrangeoptions from Java API (#10880)
Summary: Add the following missing options to `src/main/java/org/rocksdb/CompactRangeOptions.java` and in `java/rocksjni/options.cc` in RocksJava. For the descriptions and API see the C++ file `include/rocksdb/options.h`, specifically the struct `CompactRangeOptions` * full_history_ts_low * canceled We changed the handle to return an object (of class `Java_org_rocksdb_CompactRangeOptions`) containing a `ROCKSDB_NAMESPACE::CompactRangeOptions` at (almost certainly) 0-offset, rather than a raw `ROCKSDB_NAMESPACE::CompactRangeOptions`. The `Java_org_rocksdb_CompactRangeOptions` contains as supplementary fields objects (std::string, std::atomic<bool>) which are passed as pointers to the `ROCKSDB_NAMESPACE::CompactRangeOptions` and which must therefore live for as long as the `ROCKSDB_NAMESPACE::CompactRangeOptions`. By placing them in a `Java_org_rocksdb_CompactRangeOptions` we achieve this. Because the field offset of the `ROCKSDB_NAMESPACE::CompactRangeOptions` member is (very probably) 0, casting the handle to ROCKSDB_NAMESPACE::CompactRangeOptions works (i.e. old methods didn’t have to be changed), but really that’s a minefield and the correct answer is to cast to the correct type (Java_org_rocksdb_CompactRangeOptions) and then use the ROCKSDB_NAMESPACE::CompactRangeOptions field in that. So the get/set methods for existing parameters have this change. Testing ------- We added unit tests for getting and setting the newly implemented fields to `CompactRangeOptionsTest` Pull Request resolved: https://github.com/facebook/rocksdb/pull/10880 Reviewed By: ajkr Differential Revision: D41482476 Pulled By: anand1976 fbshipit-source-id: c70795e790436fb3544655920adf6fca62ed34e2 |
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 |
|
akankshamahajan
|
bf9e864235 |
Update db_crashtest.py for support for dir creation on remote storage (#11448)
Summary: - add TEST_TMPDIR_EXPECTED env in crash test if expected dir is on different filesystem. If TEST_TMPDIR_EXPECTED is not specified, it'll fallback to default value of TEST_TMPDIR (Same as before) Pull Request resolved: https://github.com/facebook/rocksdb/pull/11448 Test Plan: Ran locally Reviewed By: anand1976 Differential Revision: D45870268 Pulled By: akankshamahajan15 fbshipit-source-id: 52a7b961d3647dde023dcf7f20341558e8a5b528 |
2 years ago |
|
Yu Zhang
|
68cc429be2 |
Fix stress test failure caused by #11424 (#11470)
Summary: The `ryw_expected_values` check only applies to when transaction is used. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11470 Reviewed By: hx235 Differential Revision: D46085614 Pulled By: jowlyzhang fbshipit-source-id: 4757896c3a62975641adcf97db077a04a0f33030 |
2 years ago |
|
akankshamahajan
|
53e0b2fe6f |
Fix regression script for async_io benchmarks (#11462)
Summary: Fix regression script for async_io benchmarks to report right ops/sec and latency Pull Request resolved: https://github.com/facebook/rocksdb/pull/11462 Test Plan: Verified locally Reviewed By: anand1976 Differential Revision: D46031147 Pulled By: akankshamahajan15 fbshipit-source-id: 33ba587e6569ab2f834381ac2538e61da6876405 |
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 |
|
Yu Zhang
|
ffb5f1f445 |
Refactor WriteUnpreparedStressTest to be a unit test (#11424)
Summary: This patch remove the "stress" aspect from the WriteUnpreparedStressTest and leave it to be a unit test for some correctness testing w.r.t. snapshot functionality. I added some read-your-write verification to the transaction test in db_stress. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11424 Test Plan: `./write_unprepared_transaction_test` `./db_crashtest.py whitebox --txn` `./db_crashtest.py blackbox --txn` Reviewed By: hx235 Differential Revision: D45551521 Pulled By: jowlyzhang fbshipit-source-id: 20c3d510eb4255b08ddd7b6c85bdb4945436f6e8 |
2 years ago |
|
FishAndBird
|
5b945adf60 |
fix typo in detecting HAVE_AUXV_GETAUXVAL (#10913)
Summary: crc32 uses CPU heavily, arm64 and ppc will benefited by crc32 accelerate. Only build via `cmake` affected - Arm64 Tested ok, crc32 acceralated, write 30GB data throughput promoted 30%. - ppc not tested. - x86_64 seems not affected. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10913 Reviewed By: pdillinger Differential Revision: D45959843 Pulled By: ajkr fbshipit-source-id: 93c91f2702fec33cca69139a2544d7c5ebeac4c6 |
2 years ago |
|
Alan Paxton
|
6eb3770b46 |
Repair/instate jemalloc build on M1 (#11257)
Summary: jemalloc was not building on M1 Macs. This makes it work. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11257 Reviewed By: anand1976 Differential Revision: D45959570 Pulled By: ajkr fbshipit-source-id: 08c2b81b399f5003a2c159d037f9bcc5d0059556 |
2 years ago |
|
Yu Zhang
|
509116c53b |
Update HISTORY.md/version.h/format compatiblity test for 8.3 release (#11464)
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/11464 Reviewed By: akankshamahajan15 Differential Revision: D46041333 Pulled By: jowlyzhang fbshipit-source-id: 7d83cf9e611451fcc7f7e4a837681ed0d4271df4 |
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 |
|
Hui Xiao
|
7263f51d50 |
Improve comment of ExpectedValue in db stress (#11456)
Summary: **Context/Summary:** https://github.com/facebook/rocksdb/pull/11424 made me realize there are a couple gaps in my `ExpectedValue` comments so I updated them, along with separating `ExpectedValue` into separate files so it's clearer that `ExpectedValue` can be used without updating `ExpectedState` (e.g, TestMultiGet() where we care about value base of expected value but not updating the ExpectedState). Pull Request resolved: https://github.com/facebook/rocksdb/pull/11456 Test Plan: CI Reviewed By: jowlyzhang Differential Revision: D45965070 Pulled By: hx235 fbshipit-source-id: dcee690c13b00a3119757ea9d43b646f9644e1a9 |
2 years ago |
|
Hui Xiao
|
50046869a4 |
Add `rocksdb.file.read.db.open.micros` (#11455)
Summary: **Context/Summary:** `rocksdb.file.read.db.open.micros` is left out in https://github.com/facebook/rocksdb/pull/11288 Pull Request resolved: https://github.com/facebook/rocksdb/pull/11455 Test Plan: - db bench Setup: `./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=false -compression_type=none -bloom_bits=3` Run: `./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=0 -write_buffer_size=6550000 -disable_auto_compactions=false -target_file_size_base=6550000 -compression_type=none -file_checksum=1 -cache_size=1` ``` rocksdb.sst.read.micros P50 : 3.979798 P95 : 9.738420 P99 : 19.566667 P100 : 39.000000 COUNT : 2360 SUM : 12148 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 : 0.000000 P95 : 0.000000 P99 : 0.000000 P100 : 0.000000 COUNT : 0 SUM : 0 rocksdb.file.read.db.open.micros P50 : 3.979798 P95 : 9.738420 P99 : 19.566667 P100 : 39.000000 COUNT : 2360 SUM : 12148 ``` Reviewed By: ajkr Differential Revision: D45951934 Pulled By: hx235 fbshipit-source-id: 6c88639dc1b10d98ecccc963ce32a8800495f55b |
2 years ago |
|
Alan Paxton
|
e110d713e0 |
Minimal RocksJava compliance with Java 8 language level (EB 1046) (#10951)
Summary: Apply a small (and automatic) set of IntelliJ Java inspections/repairs to the Java interface to RocksDB Java and its tests. Partly enabled by the fact that we now (from RocksDB7) require java 8. Explicit <p> in empty lines in javadoc comments. Parameters and variables made final where possible. Anonymous subclasses converted lambdas. Some tests which previously used other assertion models were converted to assertj, e.g. (assertThat(actual).isEqualTo(expected) In a very few cases tests were found to be inoperative or broken, and were repaired. No problems with actual RocksDB behaviour were observed. This PR is intended to replace https://github.com/facebook/rocksdb/pull/9618 - that PR was not merged, and attempts to rebase it have yielded a questionable looking diff, so we choose to go back to square 1 here, and implement a conservative set of changes. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10951 Reviewed By: anand1976 Differential Revision: D45057849 Pulled By: ajkr fbshipit-source-id: e4ea46bfc80518ae86f37702b03ca9352bc11c3d |
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 |
|
Hui Xiao
|
5fc57eec2b |
Support parallel read and write/delete to same key in NonBatchedOpsStressTest (#11058)
Summary: **Context:** Current `NonBatchedOpsStressTest` does not allow multi-thread read (i.e, Get, Iterator) and write (i.e, Put, Merge) or delete to the same key. Every read or write/delete operation will acquire lock (`GetLocksForKeyRange`) on the target key to gain exclusive access to it. This does not align with RocksDB's nature of allowing multi-thread read and write/delete to the same key, that is concurrent threads can issue read/write/delete to RocksDB without external locking. Therefore this is a gap in our testing coverage. To close the gap, biggest challenge remains in verifying db value against expected state in presence of parallel read and write/delete. The challenge is due to read/write/delete to the db and read/write to expected state is not within one atomic operation. Therefore we may not know the exact expected state of a certain db read, as by the time we read the expected state for that db read, another write to expected state for another db write to the same key might have changed the expected state. **Summary:** Credited to ajkr's idea, we now solve this challenge by breaking the 32-bits expected value of a key into different parts that can be read and write to in parallel. Basically we divide the 32-bits expected value into `value_base` (corresponding to the previous whole 32 bits but now with some shrinking in the value base range we allow), `pending_write` (i.e, whether there is an ongoing concurrent write), `del_counter` (i.e, number of times a value has been deleted, analogous to value_base for write), `pending_delete` (similar to pending_write) and `deleted` (i.e whether a key is deleted). Also, we need to use incremental `value_base` instead of random value base as before because we want to control the range of value base a correct db read result can possibly be in presence of parallel read and write. In that way, we can verify the correctness of the read against expected state more easily. This is at the cost of reducing the randomness of the value generated in NonBatchedOpsStressTest we are willing to accept. (For detailed algorithm of how to use these parts to infer expected state of a key, see the PR) Misc: hide value_base detail from callers of ExpectedState by abstracting related logics into ExpectedValue class Pull Request resolved: https://github.com/facebook/rocksdb/pull/11058 Test Plan: - Manual test of small number of keys (i.e, high chances of parallel read and write/delete to same key) with equally distributed read/write/deleted for 30 min ``` python3 tools/db_crashtest.py --simple {blackbox|whitebox} --sync_fault_injection=1 --skip_verifydb=0 --continuous_verification_interval=1000 --clear_column_family_one_in=0 --max_key=10 --column_families=1 --threads=32 --readpercent=25 --writepercent=25 --nooverwritepercent=0 --iterpercent=25 --verify_iterator_with_expected_state_one_in=1 --num_iterations=5 --delpercent=15 --delrangepercent=10 --range_deletion_width=5 --use_merge={0|1} --use_put_entity_one_in=0 --use_txn=0 --verify_before_write=0 --user_timestamp_size=0 --compact_files_one_in=1000 --compact_range_one_in=1000 --flush_one_in=1000 --get_property_one_in=1000 --ingest_external_file_one_in=100 --backup_one_in=100 --checkpoint_one_in=100 --approximate_size_one_in=0 --acquire_snapshot_one_in=100 --use_multiget=0 --prefixpercent=0 --get_live_files_one_in=1000 --manual_wal_flush_one_in=1000 --pause_background_one_in=1000 --target_file_size_base=524288 --write_buffer_size=524288 --verify_checksum_one_in=1000 --verify_db_one_in=1000 ``` - Rehearsal stress test for normal parameter and aggressive parameter to see if such change can find what existing stress test can find (i.e, no regression in testing capability) - [Ongoing]Try to find new bugs with this change that are not found by current NonBatchedOpsStressTest with no parallel read and write/delete to same key Reviewed By: ajkr Differential Revision: D42257258 Pulled By: hx235 fbshipit-source-id: e6fdc18f1fad3753e5ac91731483a644d9b5b6eb |
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 |
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Andrew Kryczka
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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 |
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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 |
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Jay Huh
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7531cbda91 |
Clean up rate limiter refill logic (#11425)
Summary: Context: This pull request update is in response to a comment made on https://github.com/facebook/rocksdb/pull/8596#discussion_r680264932. The current implementation of RefillBytesAndGrantRequestsLocked() drains all available_bytes, but the first request after the last wave of requesting/bytes granting is done is not being handled in the same way. This creates a scenario where if a request for a large amount of bytes is enqueued first, but there are not enough available_bytes to fulfill it, the request is put to sleep until the next refill time. Meanwhile, a later request for a smaller number of bytes comes in and is granted immediately. This behavior is not fair as the earlier request was made first. To address this issue, we have made changes to the code to exhaust the remaining available bytes from the request and queue the remaining. With this change, requests are granted in the order they are received, ensuring that earlier requests are not unfairly delayed by later, smaller requests. The specific scenario described above will no longer occur with this change. Also consolidated `granted` and `request_bytes` as part of the change since `granted` is equivalent to `request_bytes == 0` Pull Request resolved: https://github.com/facebook/rocksdb/pull/11425 Test Plan: Added `AvailableByteSizeExhaustTest` Reviewed By: hx235 Differential Revision: D45570711 Pulled By: jaykorean fbshipit-source-id: a7117ed17bf4b8a7ae0f76124cb41902db1a2592 |
2 years ago |
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Peter Dillinger
|
459969e993 |
Simplify detection of x86 CPU features (#11419)
Summary: **Background** - runtime detection of certain x86 CPU features was added for optimizing CRC32c checksums, where performance is dramatically affected by the availability of certain CPU instructions and code using intrinsics for those instructions. And Java builds with native library try to be broadly compatible but performant. What has changed is that CRC32c is no longer the most efficient cheecksum on contemporary x86_64 hardware, nor the default checksum. XXH3 is generally faster and not as dramatically impacted by the availability of certain CPU instructions. For example, on my Skylake system using db_bench (similar on an older Skylake system without AVX512): PORTABLE=1 empty USE_SSE : xxh3->8 GB/s crc32c->0.8 GB/s (no SSE4.2 nor AVX2 instructions) PORTABLE=1 USE_SSE=1 : xxh3->19 GB/s crc32c->16 GB/s (with SSE4.2 and AVX2) PORTABLE=0 USE_SSE ignored: xxh3->28 GB/s crc32c->16 GB/s (also some AVX512) Testing a ~10 year old system, with SSE4.2 but without AVX2, crc32c is a similar speed to the new systems but xxh3 is only about half that speed, also 8GB/s like the non-AVX2 compile above. Given that xxh3 has specific optimization for AVX2, I think we can infer that that crc32c is only fastest for that ~2008-2013 period when SSE4.2 was included but not AVX2. And given that xxh3 is only about 2x slower on these systems (not like >10x slower for unoptimized crc32c), I don't think we need to invest too much in optimally adapting to these old cases. x86 hardware that doesn't support fast CRC32c is now extremely rare, so requiring a custom build to support such hardware is fine IMHO. **This change** does two related things: * Remove runtime CPU detection for optimizing CRC32c on x86. Maintaining this code is non-zero work, and compiling special code that doesn't work on the configured target instruction set for code generation is always dubious. (On the one hand we have to ensure the CRC32c code uses SSE4.2 but on the other hand we have to ensure nothing else does.) * Detect CPU features in source code, not in build scripts. Although there are some hypothetical advantages to detectiong in build scripts (compiler generality), RocksDB supports at least three build systems: make, cmake, and buck. It's not practical to support feature detection on all three, and we have suffered from missed optimization opportunities by relying on missing or incomplete detection in cmake and buck. We also depend on some components like xxhash that do source code detection anyway. **In more detail:** * `HAVE_SSE42`, `HAVE_AVX2`, and `HAVE_PCLMUL` replaced by standard macros `__SSE4_2__`, `__AVX2__`, and `__PCLMUL__`. * MSVC does not provide high fidelity defines for SSE, PCLMUL, or POPCNT, but we can infer those from `__AVX__` or `__AVX2__` in a compatibility header. In rare cases of false negative or false positive feature detection, a build engineer should be able to set defines to work around the issue. * `__POPCNT__` is another standard define, but we happen to only need it on MSVC, where it is set by that compatibility header, or can be set by the build engineer. * `PORTABLE` can be set to a CPU type, e.g. "haswell", to compile for that CPU type. * `USE_SSE` is deprecated, now equivalent to PORTABLE=haswell, which roughly approximates its old behavior. Notably, this change should enable more builds to use the AVX2-optimized Bloom filter implementation. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11419 Test Plan: existing tests, CI Manual performance tests after the change match the before above (none expected with make build). We also see AVX2 optimized Bloom filter code enabled when expected, by injecting a compiler error. (Performance difference is not big on my current CPU.) Reviewed By: ajkr Differential Revision: D45489041 Pulled By: pdillinger fbshipit-source-id: 60ceb0dd2aa3b365c99ed08a8b2a087a9abb6a70 |
2 years ago |
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Peter Dillinger
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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 |
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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 |