- 13 4月, 2018 2 次提交
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由 David Lai 提交于
Summary: This PR comments out the rest of the unused arguments which allow us to turn on the -Wunused-parameter flag. This is the second part of a codemod relating to https://github.com/facebook/rocksdb/pull/3557. Closes https://github.com/facebook/rocksdb/pull/3662 Differential Revision: D7426121 Pulled By: Dayvedde fbshipit-source-id: 223994923b42bd4953eb016a0129e47560f7e352
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由 Maysam Yabandeh 提交于
Summary: This is a hack as temporary fix of MyRocks with rollbacking the merge operands. The way MyRocks uses merge operands is without protection of locks, which violates the assumption behind the rollback algorithm. They are ok with not being rolled back as it would just create a gap in the autoincrement column. The hack add an option to disable the rollback of merge operands by default and only enables it to let the unit test pass. Closes https://github.com/facebook/rocksdb/pull/3711 Differential Revision: D7597177 Pulled By: maysamyabandeh fbshipit-source-id: 544be0f666c7e7abb7f651ec8b23124e05056728
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- 12 4月, 2018 2 次提交
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由 Maysam Yabandeh 提交于
Summary: We introduced smallest_prep optimization in this commit b225de7e, which enables storing the smallest uncommitted sequence number along with the snapshot. This enables the readers that read from the snapshot to skip further checks and safely assumed the data is committed if its sequence number is less than smallest uncommitted when the snapshot was taken. The problem was that smallest uncommitted and the snapshot must be taken atomically, and the lack of atomicity had led to readers using a smallest uncommitted after the snapshot was taken and hence mistakenly skipping some data. This patch fixes the problem by i) separating the process of removing of prepare entries from the AddCommitted function, ii) removing the prepare entires AFTER the committed sequence number is published, iii) getting smallest uncommitted (from the prepare list) BEFORE taking a snapshot. This guarantees that the smallest uncommitted that is accompanied with a snapshot is less than or equal of such number if it was obtained atomically. Tested by running MySQLStyleTransactionTest/MySQLStyleTransactionTest.TransactionStressTest that was failing sporadically. Closes https://github.com/facebook/rocksdb/pull/3703 Differential Revision: D7581934 Pulled By: maysamyabandeh fbshipit-source-id: dc9d6f4fb477eba75d4d5927326905b548a96a32
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由 Yanqin Jin 提交于
Summary: Add `compaction_reason` as part of event log for event `compaction started`. Add counters for each `CompactionReason`. Closes https://github.com/facebook/rocksdb/pull/3679 Differential Revision: D7550348 Pulled By: riversand963 fbshipit-source-id: a19cff3a678c785aa5ef41aac78b9a5968fcc34d
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- 11 4月, 2018 3 次提交
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由 Andrew Kryczka 提交于
Summary: In `cf_options_type_info`, the deprecated options are all considered to have offset zero in the `MutableCFOptions` struct. Previously we weren't checking in `GetMutableOptionsFromStrings` whether the provided option was deprecated or not and simply writing the provided value to the offset specified by `cf_options_type_info`. That meant setting any deprecated option would overwrite the first element in the struct, which is `write_buffer_size`. `db_stress` hit this often since it calls `SetOptions` with `soft_rate_limit=0` and `hard_rate_limit=0`, which are both deprecated so cause `write_buffer_size` to be set to zero, which causes it to crash on the following assertion: ``` db_stress: db/memtable.cc:106: rocksdb::MemTable::MemTable(const rocksdb::InternalKeyComparator&, const rocksdb::ImmutableCFOptions&, const rocksdb::MutableCFOptions&, rocksdb::WriteBufferManager*, rocksdb::SequenceNumber, uint32_t): Assertion `!ShouldScheduleFlush()' failed. ``` We fix it by skipping deprecated options (and logging a warning) when users provide them to `SetOptions`. I didn't want to fail the call for compatibility reasons. Closes https://github.com/facebook/rocksdb/pull/3700 Differential Revision: D7572596 Pulled By: ajkr fbshipit-source-id: bd5d84e14c0c39f30c5d4c6df7c1503d2c28ecf1
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由 Yanqin Jin 提交于
Summary: 1. Remove redundant text. 2. Make terminology consistent across all comments and doc of RocksDB. Also do our best to conform to conventions. Specifically, use 'callback' instead of 'call-back' [wikipedia](https://en.wikipedia.org/wiki/Callback_(computer_programming)). Closes https://github.com/facebook/rocksdb/pull/3693 Differential Revision: D7560396 Pulled By: riversand963 fbshipit-source-id: ba8c251c487f4e7d1872a1a8dc680f9e35a6ffb8
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由 Zhongyi Xie 提交于
Summary: fix a new TSAN failure https://gist.github.com/miasantreble/7599c33f4e17da1024c67d4540dbe397 Closes https://github.com/facebook/rocksdb/pull/3694 Differential Revision: D7565310 Pulled By: miasantreble fbshipit-source-id: f672c96e925797b34dec6e20b59527e8eebaa825
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- 10 4月, 2018 5 次提交
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由 Dmitri Smirnov 提交于
Summary: Fix up OACR(Lint) warnings. Closes https://github.com/facebook/rocksdb/pull/3674 Differential Revision: D7563869 Pulled By: ajkr fbshipit-source-id: 8c1e5045c8a6a2d85b2933fdbc60fde93bf0c9de
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由 Maysam Yabandeh 提交于
Summary: The existing unit test did not set the level so the check for pinned partitioned filter/index being properly released from the block cache was not properly exercised as they only take effect in level 0. As a result a memory leak in pinned partitioned filters was hidden. The patch fix the test as well as the bug. Closes https://github.com/facebook/rocksdb/pull/3692 Differential Revision: D7559763 Pulled By: maysamyabandeh fbshipit-source-id: 55eff274945838af983c764a7d71e8daff092e4a
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由 Gihwan Oh 提交于
Summary: In this case, we add input files of compaction, not outputs. Closes https://github.com/facebook/rocksdb/pull/3686 Differential Revision: D7556781 Pulled By: ajkr fbshipit-source-id: ae135bb6eda60db8f275a9ba2d21c18aaadef5b7
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由 Andrew Kryczka 提交于
Summary: - inflate the argument passed as `max_compact_bytes_per_del_file` by a bit (10%). The intent of this argument is prevent L0 files from being intra-L0 compacted multiple times. Without compression, some intra-L0 compactions exceed this limit (and thus aren't executed), even though none of their files have gone through intra-L0 before. - fix `FindIntraL0Compaction` as it was rejecting some valid intra-L0 compactions. In particular, `compact_bytes_per_del_file` is the work-per-deleted-file for the span [0, span_len), whereas `new_compact_bytes_per_del_file` is the work-per-deleted-file for the span [0, span_len+1). The former is more correct for checking whether we've found an eligible span. Closes https://github.com/facebook/rocksdb/pull/3684 Differential Revision: D7530396 Pulled By: ajkr fbshipit-source-id: cad4f50902bdc428ac9ff6fffb13eb288648d85e
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由 Zhongyi Xie 提交于
Summary: Fix a TSAN failure in `DBRangeDelTest.ValidLevelSubcompactionBoundaries`: https://gist.github.com/miasantreble/712e04b4de2ff7f193c98b1acf07e899 Closes https://github.com/facebook/rocksdb/pull/3691 Differential Revision: D7541400 Pulled By: miasantreble fbshipit-source-id: b0b4538980bce7febd0385e61d6e046580bcaefb
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- 08 4月, 2018 2 次提交
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由 Maysam Yabandeh 提交于
Summary: Adding some stats that would be helpful to monitor if the DB has gone to unlikely stats that would hurt the performance. These are mostly when we end up needing to acquire a mutex. Closes https://github.com/facebook/rocksdb/pull/3683 Differential Revision: D7529393 Pulled By: maysamyabandeh fbshipit-source-id: f7d36279a8f39bd84d8ddbf64b5c97f670c5d6d9
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由 Maysam Yabandeh 提交于
Summary: Currently dump_wal cannot print the prepared records from the WAL that is generated by WRITE_PREPARED write policy since the default reaction of the handler is to return NotSupported if markers of WRITE_PREPARED are encountered. This patch enables the admin to pass --write_committed=false option, which will be accordingly passed to the handler. Note that DBFileDumperCommand and DBDumperCommand are still not updated by this patch but firstly they are not urgent and secondly we need to revise this approach later when we also add WRITE_UNPREPARED markers so I leave it for future work. Tested by running it on a WAL generated by WRITE_PREPARED: $ ./ldb dump_wal --walfile=/dev/shm/dbbench/000003.log | grep BEGIN_PREARE | head -1 1,2,70,0,BEGIN_PREARE $ ./ldb dump_wal --walfile=/dev/shm/dbbench/000003.log --write_committed=false | grep BEGIN_PREARE | head -1 1,2,70,0,BEGIN_PREARE PUT(0) : 0x30303031313330313938 PUT(0) : 0x30303032353732313935 END_PREPARE(0x74786E31313535383434323738303738363938313335312D30) Closes https://github.com/facebook/rocksdb/pull/3682 Differential Revision: D7522090 Pulled By: maysamyabandeh fbshipit-source-id: a0332207261c61e18b2f9dfbe9feecd9a1339aca
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- 07 4月, 2018 2 次提交
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由 Adam Retter 提交于
Summary: Closes https://github.com/facebook/rocksdb/pull/3666 Differential Revision: D7457634 Pulled By: sagar0 fbshipit-source-id: 47741e2ee66e9255c580f4e38cfb86b284c27c2f
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由 Gihwan Oh 提交于
Summary: regrad -> regard Closes https://github.com/facebook/rocksdb/pull/3685 Differential Revision: D7540952 Pulled By: miasantreble fbshipit-source-id: e08c9389f7fccf401c962a4441b62cd5e73a33ad
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- 06 4月, 2018 8 次提交
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由 Andrew Kryczka 提交于
Summary: When `max_valid_backups_to_open` is set, the `BackupEngine` doesn't know about the files referenced by existing backups. This PR prevents us from deleting valid files when that option is set, in cases where we are unable to accurately determine refcount. There are warnings logged when we may miss deleting unreferenced files, and a recommendation in the header for users to periodically unset this option and run a full `GarbageCollect`. Closes https://github.com/facebook/rocksdb/pull/3518 Differential Revision: D7008331 Pulled By: ajkr fbshipit-source-id: 87907f964dc9716e229d08636a895d2fc7b72305
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由 zhsj 提交于
Summary: shared-ppc-objects is missed in $(SHARED4) target Closes https://github.com/facebook/rocksdb/pull/3619 Differential Revision: D7475767 Pulled By: ajkr fbshipit-source-id: d957ac7290bab3cd542af504405fb5ff912bfbf1
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Summary: In this change, an option to set different paths for different column families is added. This option is set via cf_paths setting of ColumnFamilyOptions. This option will work in a similar fashion to db_paths setting. Cf_paths is a vector of Dbpath values which contains a pair of the absolute path and target size. Multiple levels in a Column family can go to different paths if cf_paths has more than one path. To maintain backward compatibility, if cf_paths is not specified for a column family, db_paths setting will be used. Note that, if db_paths setting is also not specified, RocksDB already has code to use db_name as the only path. Changes : 1) A new member "cf_paths" is added to ImmutableCfOptions. This is set, based on cf_paths setting of ColumnFamilyOptions and db_paths setting of ImmutableDbOptions. This member is used to identify the path information whenever files are accessed. 2) Validation checks are added for cf_paths setting based on existing checks for db_paths setting. 3) DestroyDB, PurgeObsoleteFiles etc. are edited to support multiple cf_paths. 4) Unit tests are added appropriately. Closes https://github.com/facebook/rocksdb/pull/3102 Differential Revision: D6951697 Pulled By: ajkr fbshipit-source-id: 60d2262862b0a8fd6605b09ccb0da32bb331787d
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由 Maysam Yabandeh 提交于
Summary: Adds two stats to allow us measuring the false positive rate of full filters: - The total count of positives: rocksdb.bloom.filter.full.positive - The total count of true positives: rocksdb.bloom.filter.full.true.positive Not the term "full" in the stat name to indicate that they are meaningful in full filters. block-based filters are to be deprecated soon and supporting it is not worth the the additional cost of if-then-else branches. Closes #3680 Tested by: $ ./db_bench -benchmarks=fillrandom -db /dev/shm/rocksdb-tmpdb --num=1000000 -bloom_bits=10 $ ./db_bench -benchmarks="readwhilewriting" -db /dev/shm/rocksdb-tmpdb --statistics -bloom_bits=10 --duration=60 --num=2000000 --use_existing_db 2>&1 > /tmp/full.log $ grep filter.full /tmp/full.log rocksdb.bloom.filter.full.positive COUNT : 3628593 rocksdb.bloom.filter.full.true.positive COUNT : 3536026 which gives the false positive rate of 2.5% Closes https://github.com/facebook/rocksdb/pull/3681 Differential Revision: D7517570 Pulled By: maysamyabandeh fbshipit-source-id: 630ab1a473afdce404916d297035b6318de4c052
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由 Yi Wu 提交于
Summary: Clock cache should check if deleter is nullptr before calling it. Closes https://github.com/facebook/rocksdb/pull/3677 Differential Revision: D7493602 Pulled By: yiwu-arbug fbshipit-source-id: 4f94b188d2baf2cbc7c0d5da30fea1215a683de4
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由 Dmitri Smirnov 提交于
Summary: Primitive types constness does not affect the signature of the method and has no influence on whether the overriding method would actually have that const bool instead of just bool. In addition, it is rarely useful but does produce a compatibility warnings in VS 2015 compiler. Closes https://github.com/facebook/rocksdb/pull/3663 Differential Revision: D7475739 Pulled By: ajkr fbshipit-source-id: fb275378b5acc397399420ae6abb4b6bfe5bd32f
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由 Yi Wu 提交于
Summary: Make blob_dump tool able to show uncompressed values if the blob file is compressed. Also show total compressed vs. raw size at the end if --show_summary is provided. Closes https://github.com/facebook/rocksdb/pull/3633 Differential Revision: D7348926 Pulled By: yiwu-arbug fbshipit-source-id: ca709cb4ed5cf6a550ff2987df8033df81516f8e
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由 Zhongyi Xie 提交于
Summary: currently rocksdb lite build fails due to the following errors: > db/db_sst_test.cc:29:51: error: ‘FlushJobInfo’ does not name a type virtual void OnFlushCompleted(DB* /*db*/, const FlushJobInfo& info) override { ^ db/db_sst_test.cc:29:16: error: ‘virtual void rocksdb::FlushedFileCollector::OnFlushCompleted(rocksdb::DB*, const int&)’ marked ‘override’, but does not override virtual void OnFlushCompleted(DB* /*db*/, const FlushJobInfo& info) override { ^ db/db_sst_test.cc:24:7: error: ‘class rocksdb::FlushedFileCollector’ has virtual functions and accessible non-virtual destructor [-Werror=non-virtual-dtor] class FlushedFileCollector : public EventListener { ^ db/db_sst_test.cc: In member function ‘virtual void rocksdb::FlushedFileCollector::OnFlushCompleted(rocksdb::DB*, const int&)’: db/db_sst_test.cc:31:35: error: request for member ‘file_path’ in ‘info’, which is of non-class type ‘const int’ flushed_files_.push_back(info.file_path); ^ cc1plus: all warnings being treated as errors make: *** [db/db_sst_test.o] Error 1 Closes https://github.com/facebook/rocksdb/pull/3676 Differential Revision: D7493006 Pulled By: miasantreble fbshipit-source-id: 77dff0a5b23e27db51be9b9798e3744e6fdec64f
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- 05 4月, 2018 1 次提交
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由 Sagar Vemuri 提交于
Summary: Ttl-triggered and snapshot-release-triggered compactions should not be considered as manual compactions. This is a bug. Closes https://github.com/facebook/rocksdb/pull/3678 Differential Revision: D7498151 Pulled By: sagar0 fbshipit-source-id: a2d5bed05268a4dc93d54ea97a9ae44b366df15d
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- 04 4月, 2018 2 次提交
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由 Dmitri Smirnov 提交于
Summary: This change models Optimistic Tx db after Pessimistic TX db. The motivation for this change is to make the ptr polymorphic so it can be held by the same raw or smart ptr. Currently, due to the inheritance of the Opt Tx db not being rooted in the manner of Pess Tx from a single DB root it is more difficult to write clean code and have clear ownership of the database in cases when options dictate instantiate of plan DB, Pess Tx DB or Opt tx db. Closes https://github.com/facebook/rocksdb/pull/3566 Differential Revision: D7184502 Pulled By: yiwu-arbug fbshipit-source-id: 31d06efafd79497bb0c230e971857dba3bd962c3
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由 Andrew Kryczka 提交于
Summary: Previously `python tools/db_crashtest.py blackbox` would do no useful work as the crash interval (two minutes) was shorter than the preparation phase. The preparation phase is slow because of the ridiculously inefficient way it computes which keys should not be overwritten. It was doing this for 60M keys since default values were `FLAGS_nooverwritepercent == 60` and `FLAGS_max_key == 100000000`. Move the "nooverwritepercent" override from whitebox-specific to the general options so it also applies to blackbox test runs. Now preparation phase takes a few seconds. Closes https://github.com/facebook/rocksdb/pull/3671 Differential Revision: D7457732 Pulled By: ajkr fbshipit-source-id: 601f4461a6a7e49e50449dcf15aebc9b8a98d6f0
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- 03 4月, 2018 6 次提交
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由 Adam Retter 提交于
Summary: Closes https://github.com/facebook/rocksdb/pull/3664 Differential Revision: D7459433 Pulled By: sagar0 fbshipit-source-id: 3817e5d45fc70e83cb26f9800eaa0f4566c8dc0e
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由 Sagar Vemuri 提交于
Summary: Level Compaction with TTL. As of today, a file could exist in the LSM tree without going through the compaction process for a really long time if there are no updates to the data in the file's key range. For example, in certain use cases, the keys are not actually "deleted"; instead they are just set to empty values. There might not be any more writes to this "deleted" key range, and if so, such data could remain in the LSM for a really long time resulting in wasted space. Introducing a TTL could solve this problem. Files (and, in turn, data) older than TTL will be scheduled for compaction when there is no other background work. This will make the data go through the regular compaction process and get rid of old unwanted data. This also has the (good) side-effect of all the data in the non-bottommost level being newer than ttl, and all data in the bottommost level older than ttl. It could lead to more writes while reducing space. This functionality can be controlled by the newly introduced column family option -- ttl. TODO for later: - Make ttl mutable - Extend TTL to Universal compaction as well? (TTL is already supported in FIFO) - Maybe deprecate CompactionOptionsFIFO.ttl in favor of this new ttl option. Closes https://github.com/facebook/rocksdb/pull/3591 Differential Revision: D7275442 Pulled By: sagar0 fbshipit-source-id: dcba484717341200d419b0953dafcdf9eb2f0267
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由 Koby Kahane 提交于
Summary: The introduction of the 3-way SSE4.2 optimized crc32c implementation in commit f54d7f5f added the `HAVE_PCLMUL` definition when the compiler supports intrinsics for that instruction, but did not modify CMakeLists.txt to set that definition on MSVC when appropriate. As a result, 3-way SSE4.2 is not used in MSVC builds with CMake although it could be. Since the existing test program in CMakeLists.txt for `HAVE_SSE42` already uses `_mm_clmulepi64_si128` which is a PCLMUL instruction, this PR sets `HAVE_PCLMUL` as well if that program builds successfully, fixing the problem. Closes https://github.com/facebook/rocksdb/pull/3673 Differential Revision: D7473975 Pulled By: miasantreble fbshipit-source-id: bc346b9eb38920e427aa1a253e6dd9811efa269e
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由 Maysam Yabandeh 提交于
Summary: The is an optimization to reduce lookup in the CommitCache when querying IsInSnapshot. The optimization takes the smallest uncommitted data at the time that the snapshot was taken and if the sequence number of the read data is lower than that number it assumes the data as committed. To implement this optimization two changes are required: i) The AddPrepared function must be called sequentially to avoid out of order insertion in the PrepareHeap (otherwise the top of the heap does not indicate the smallest prepare in future too), ii) non-2PC transactions also call AddPrepared if they do not commit in one step. Closes https://github.com/facebook/rocksdb/pull/3649 Differential Revision: D7388630 Pulled By: maysamyabandeh fbshipit-source-id: b79506238c17467d590763582960d4d90181c600
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由 Amy Tai 提交于
Summary: Manual compactions should be cancelled, just like scheduled compactions are cancelled, if sfm->EnoughRoomForCompaction is not true. Closes https://github.com/facebook/rocksdb/pull/3670 Differential Revision: D7457683 Pulled By: amytai fbshipit-source-id: 669b02fdb707f75db576d03d2c818fb98d1876f5
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由 Zhongyi Xie 提交于
Summary: …r multiple times" This reverts commit e80709a3. lingbin PR https://github.com/facebook/rocksdb/pull/3635 is causing some performance regression for seekrandom workloads I'm reverting the commit for now but feel free to submit new patches
😃 To reproduce the regression, you can run the following db_bench command > ./db_bench --benchmarks=fillrandom,seekrandomwhilewriting --threads=1 --num=1000000 --reads=150000 --key_size=66 --value_size=1262 --statistics=0 --compression_ratio=0.5 --histogram=1 --seek_nexts=1 --stats_per_interval=1 --stats_interval_seconds=600 --max_background_flushes=4 --num_multi_db=1 --max_background_compactions=16 --seed=1522388277 -write_buffer_size=1048576 --level0_file_num_compaction_trigger=10000 --compression_type=none write stats printed by db_bench: Table | | | | | | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- revert commit | Percentiles: | P50: | 80.77 | P75: |102.94 |P99: | 1786.44 | P99.9: | 1892.39 |P99.99: 2645.10 | keep commit | Percentiles: | P50: | 221.72 | P75: | 686.62 | P99: | 1842.57 | P99.9: | 1899.70| P99.99: 2814.29| Closes https://github.com/facebook/rocksdb/pull/3672 Differential Revision: D7463315 Pulled By: miasantreble fbshipit-source-id: 8e779c87591127f2c3694b91a56d9b459011959d
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- 02 4月, 2018 1 次提交
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由 Adam Retter 提交于
Summary: Closes https://github.com/facebook/rocksdb/pull/3667 Differential Revision: D7470060 Pulled By: miasantreble fbshipit-source-id: 8e8545cda38f0805f35ccdb8841666a2d7a965f5
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- 31 3月, 2018 4 次提交
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由 Fosco Marotto 提交于
Summary: Replaces #1702 and is updated from feedback. Closes https://github.com/facebook/rocksdb/pull/3531 Differential Revision: D7457395 Pulled By: gfosco fbshipit-source-id: 25a21dd8cfa5a6e42e024208b444d9379d920c82
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由 Fosco Marotto 提交于
Summary: Some flags used via make were not applied in the buckifier/targets file, causing some failures to be missed by testing infra ( ie the one fixed by #3434 ) Closes https://github.com/facebook/rocksdb/pull/3452 Differential Revision: D7457419 Pulled By: gfosco fbshipit-source-id: e4aed2915ca3038c1485bbdeebedfc33d5704a49
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由 Fosco Marotto 提交于
Summary: This was failing the build on windows with zstd, warning treated as an error, 32-bit shift implicitly converted to 64-bit. Closes https://github.com/facebook/rocksdb/pull/3624 Differential Revision: D7307883 Pulled By: gfosco fbshipit-source-id: 68110e9b5b1b59b668dec6cf86b67556402574e7
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由 Maysam Yabandeh 提交于
Summary: This patch record the deleted WAL numbers in the manifest to ignore them and any WAL older than them during recovery. This is to avoid scenarios when we have a gap between the WAL files are fed to the recovery procedure. The gap could happen by for example out-of-order WAL deletion. Such gap could cause problems in 2PC recovery where the prepared and commit entry are placed into two separate WAL and gap in the WALs could result into not processing the WAL with the commit entry and hence breaking the 2PC recovery logic. Closes https://github.com/facebook/rocksdb/pull/3488 Differential Revision: D6967893 Pulled By: maysamyabandeh fbshipit-source-id: 13119feb155a08ab6d4909f437c7a750480dc8a1
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- 30 3月, 2018 1 次提交
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由 Maysam Yabandeh 提交于
Summary: When using two_write_queue, the published seq and the last allocated sequence could be ahead of the LastSequence, even if both write queues are stopped as in WriteRecoverableState. The patch fixes a bug in WriteRecoverableState in which LastSequence was used as a reference but the result was applied to last fetched sequence and last published seq. Closes https://github.com/facebook/rocksdb/pull/3665 Differential Revision: D7446099 Pulled By: maysamyabandeh fbshipit-source-id: 1449bed9aed8e9db6af85946efd347cb8efd3c0b
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- 29 3月, 2018 1 次提交
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由 Adam Retter 提交于
Summary: Closes https://github.com/facebook/rocksdb/pull/3654 Differential Revision: D7417948 Pulled By: sagar0 fbshipit-source-id: 9514df9328181e54a6384764444c0c7ce66e7f5f
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