- 30 7月, 2019 2 次提交
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由 Manuel Ung 提交于
Summary: The `TransactionTest.MultiGetBatchedTest` were failing with unprepared batches because we were not using the correct callbacks. Override MultiGet to pass down the correct ReadCallback. A similar problem is also fixed in WritePrepared. This PR also fixes an issue similar to (https://github.com/facebook/rocksdb/pull/5147), but for MultiGet instead of Get. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5634 Differential Revision: D16552674 Pulled By: lth fbshipit-source-id: 736eaf8e919c6b13d5f5655b1c0d36b57ad04804
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由 haoyuhuang 提交于
Summary: This PR optimizes the hybrid row-block cache simulator. If a Get request hits the cache, we treat all its future accesses as hits. Consider a Get request (no snapshot) accesses multiple files, e.g, file1, file2, file3. We construct the row key as "fdnumber_key_0". Before this PR, if it hits the cache when searching the key in file1, we continue to process its accesses in file2 and file3 which is unnecessary. With this PR, if "file1_key_0" is in the cache, we treat all future accesses of this Get request as hits. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5616 Differential Revision: D16453187 Pulled By: HaoyuHuang fbshipit-source-id: 56f3169cc322322305baaf5543226a0824fae19f
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- 27 7月, 2019 7 次提交
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由 Manuel Ung 提交于
Summary: The ssize_t type was introduced in https://github.com/facebook/rocksdb/pull/5633, but it seems like it's a POSIX specific type. I just need a signed type to represent number of bytes, so use int64_t instead. It seems like we have a typedef from SSIZE_T for Windows, but it doesn't seem like we ever include "port/port.h" in our public header files. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5638 Differential Revision: D16526269 Pulled By: lth fbshipit-source-id: 8d3a5c41003951b74b29bc5f1d949b2b22da0cee
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由 Levi Tamasi 提交于
Summary: This test frequently times out under TSAN; reducing the number of random iterations to make it complete faster. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5635 Test Plan: buck test mode/dev-tsan internal_repo_rocksdb/repo:compact_on_deletion_collector_test Differential Revision: D16523505 Pulled By: ltamasi fbshipit-source-id: 6a69909bce9d204c891150fcb3d536547b3253d0
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由 haoyuhuang 提交于
Summary: This PR implements cache eviction using reinforcement learning. It includes two implementations: 1. An implementation of Thompson Sampling for the Bernoulli Bandit [1]. 2. An implementation of LinUCB with disjoint linear models [2]. The idea is that a cache uses multiple eviction policies, e.g., MRU, LRU, and LFU. The cache learns which eviction policy is the best and uses it upon a cache miss. Thompson Sampling is contextless and does not include any features. LinUCB includes features such as level, block type, caller, column family id to decide which eviction policy to use. [1] Daniel J. Russo, Benjamin Van Roy, Abbas Kazerouni, Ian Osband, and Zheng Wen. 2018. A Tutorial on Thompson Sampling. Found. Trends Mach. Learn. 11, 1 (July 2018), 1-96. DOI: https://doi.org/10.1561/2200000070 [2] Lihong Li, Wei Chu, John Langford, and Robert E. Schapire. 2010. A contextual-bandit approach to personalized news article recommendation. In Proceedings of the 19th international conference on World wide web (WWW '10). ACM, New York, NY, USA, 661-670. DOI=http://dx.doi.org/10.1145/1772690.1772758 Pull Request resolved: https://github.com/facebook/rocksdb/pull/5610 Differential Revision: D16435067 Pulled By: HaoyuHuang fbshipit-source-id: 6549239ae14115c01cb1e70548af9e46d8dc21bb
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由 Manuel Ung 提交于
Summary: Instead of reusing `TransactionOptions::max_write_batch_size` for determining when to flush a write batch for write unprepared, add a new variable called `write_batch_flush_threshold` for this use case instead. Also add `TransactionDBOptions::default_write_batch_flush_threshold` which sets the default value if `TransactionOptions::write_batch_flush_threshold` is unspecified. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5633 Differential Revision: D16520364 Pulled By: lth fbshipit-source-id: d75ae5a2141ce7708982d5069dc3f0b58d250e8c
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由 Levi Tamasi 提交于
Summary: This test frequently times out under TSAN; parallelizing it should fix this issue. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5632 Test Plan: make check buck test mode/dev-tsan internal_repo_rocksdb/repo:db_bloom_filter_test Differential Revision: D16519399 Pulled By: ltamasi fbshipit-source-id: 66e05a644d6f79c6d544255ffcf6de195d2d62fe
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由 Manuel Ung 提交于
Summary: Transaction::RollbackToSavePoint undos the modification made since the SavePoint beginning, and also unlocks the corresponding keys, which are tracked in the last SavePoint. Currently ::PopSavePoint simply discard these tracked keys, leaving them locked in the lock manager. This breaks a subsequent ::RollbackToSavePoint behavior as it loses track of such keys, and thus cannot unlock them. The patch fixes ::PopSavePoint by passing on the track key information to the previous SavePoint. Fixes https://github.com/facebook/rocksdb/issues/5618 Pull Request resolved: https://github.com/facebook/rocksdb/pull/5628 Differential Revision: D16505325 Pulled By: lth fbshipit-source-id: 2bc3b30963ab4d36d996d1f66543c93abf358980
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由 Yanqin Jin 提交于
Summary: current `clean` target in Makefile does not remove parallel test binaries. Fix this. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5629 Test Plan: (on devserver) Take file_reader_writer_test for instance. ``` $make -j32 file_reader_writer_test $make clean ``` Verify that binary file 'file_reader_writer_test' is delete by `make clean`. Differential Revision: D16513176 Pulled By: riversand963 fbshipit-source-id: 70acb9f56c928a494964121b86aacc0090f31ff6
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- 26 7月, 2019 3 次提交
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由 Eli Pozniansky 提交于
Summary: The new DB::GetApproximateSizes with SizeApproximationOptions argument, which allows to add more options/knobs to the DB::GetApproximateSizes call (beyond only the include_flags) Pull Request resolved: https://github.com/facebook/rocksdb/pull/5626 Differential Revision: D16496913 Pulled By: elipoz fbshipit-source-id: ee8c6c182330a285fa056ecfc3905a592b451720
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由 Yanqin Jin 提交于
Summary: In previous https://github.com/facebook/rocksdb/issues/5079, we added user-specified timestamp to `DB::Get()` and `DB::Put()`. Limitation is that these two functions may cause extra memory allocation and key copy. The reason is that `WriteBatch` does not allocate extra memory for timestamps because it is not aware of timestamp size, and we did not provide an API to assign/update timestamp of each key within a `WriteBatch`. We address these issues in this PR by doing the following. 1. Add a `timestamp_size_` to `WriteBatch` so that `WriteBatch` can take timestamps into account when calling `WriteBatch::Put`, `WriteBatch::Delete`, etc. 2. Add APIs `WriteBatch::AssignTimestamp` and `WriteBatch::AssignTimestamps` so that application can assign/update timestamps for each key in a `WriteBatch`. 3. Avoid key copy in `GetImpl` by adding new constructor to `LookupKey`. Test plan (on devserver): ``` $make clean && COMPILE_WITH_ASAN=1 make -j32 all $./db_basic_test --gtest_filter=Timestamp/DBBasicTestWithTimestampWithParam.PutAndGet/* $make check ``` If the API extension looks good, I will add more unit tests. Some simple benchmark using db_bench. ``` $rm -rf /dev/shm/dbbench/* && TEST_TMPDIR=/dev/shm ./db_bench -benchmarks=fillseq,readrandom -num=1000000 $rm -rf /dev/shm/dbbench/* && TEST_TMPDIR=/dev/shm ./db_bench -benchmarks=fillrandom -num=1000000 -disable_wal=true ``` Master is at a78503bd. ``` | | readrandom | fillrandom | | master | 15.53 MB/s | 25.97 MB/s | | PR5502 | 16.70 MB/s | 25.80 MB/s | ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/5502 Differential Revision: D16340894 Pulled By: riversand963 fbshipit-source-id: 51132cf792be07d1efc3ac33f5768c4ee2608bb8
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由 Chad Austin 提交于
Summary: Make rocksdb build on macos: 1) Reorganize OS-specific flags and deps in rocksdb/src/TARGETS 2) Sandbox fbcode apple platform builds from repo root include path (which conflicts with layout of rocksdb headers). 3) Fix dep-translation for bzip2. Reviewed By: andrewjcg Differential Revision: D15125826 fbshipit-source-id: 8e143c689b88b5727e54881a5e80500f879a320b
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- 25 7月, 2019 4 次提交
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由 Maysam Yabandeh 提交于
Summary: The ::snap_refresh_nanos option is incompatible with DeleteRange feature. Currently the code relies on range_del_agg.IsEmpty() to disable it if there are range delete tombstones. However ::IsEmpty does not guarantee that there is no RangeDelete tombstones in the SST files. The patch declares the two features incompatible in inline comments until we later figure how to properly detect the presence of RangeDelete tombstones in compaction inputs. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5625 Differential Revision: D16468218 Pulled By: maysamyabandeh fbshipit-source-id: bd7beca278bc7e1db75e7ee4522d05a3a6ca86f4
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由 sdong 提交于
Summary: AutoRollLogger sets GetStatus() to be non-OK if the log file fails to be created and logger_ is set to null. It is left to the caller to check the status before calling function to this class. There is no harm to create another null checking to logger_ before we using it, so that in case users mis-use the logger, they don't get a segfault. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5623 Test Plan: Run all existing tests. Differential Revision: D16466251 fbshipit-source-id: 262b885eec28bf741d91e9191c3cb5ff964e1bce
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由 sdong 提交于
Summary: Auto roll logger fails to handle file creation error in the correct way, which may expose to seg fault condition to users. Fix it. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5622 Test Plan: Add a unit test on creating file under a non-existing directory. The test fails without the fix. Differential Revision: D16460853 fbshipit-source-id: e96da4bef4f16db171ea04a11b2ec5a9448ddbde
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由 Manuel Ung 提交于
Summary: Simplify WriteUnpreparedTxnReadCallback so we just have one function `CalcMaxVisibleSeq`. Also, there's no need for the read callback to hold onto the transaction any more, so just hold the set of unprep_seqs, reducing about of indirection in `IsVisibleFullCheck`. Also, some comments about using transaction snapshot were out of date, so remove them. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5621 Differential Revision: D16459883 Pulled By: lth fbshipit-source-id: cd581323fd18982e817d99af57b6eaba59e599bb
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- 24 7月, 2019 6 次提交
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由 sdong 提交于
Summary: num_range_deletions printing is wrong in this log line: 2019/07/18-12:59:15.309271 7f869f9ff700 EVENT_LOG_v1 {"time_micros": 1563479955309228, "cf_name": "5", "job": 955, "event": "table_file_creation", "file_number": 34579, "file_size": 2239842, "table_properties": {"data_size": 1988792, "index_size": 3067, "index_partitions": 0, "top_level_index_size": 0, "index_key_is_user_key": 0, "index_value_is_delta_encoded": 1, "filter_size": 170821, "raw_key_size": 1951792, "raw_average_key_size": 16, "raw_value_size": 1731720, "raw_average_value_size": 14, "num_data_blocks": 199, "num_entries": 121987, "num_deletions": 15184, "num_merge_operands": 86512, "num_range_deletions": 86512, "format_version": 0, "fixed_key_len": 0, "filter_policy": "rocksdb.BuiltinBloomFilter", "column_family_name": "5", "column_family_id": 5, "comparator": "leveldb.BytewiseComparator", "merge_operator": "PutOperator", "prefix_extractor_name": "rocksdb.FixedPrefix.7", "property_collectors": "[]", "compression": "ZSTD", "compression_options": "window_bits=-14; level=32767; strategy=0; max_dict_bytes=0; zstd_max_train_bytes=0; enabled=0; ", "creation_time": 1563479951, "oldest_key_time": 0, "file_creation_time": 1563479954}} It actually prints "num_merge_operands" number. Fix it. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5617 Test Plan: Just build. Differential Revision: D16453110 fbshipit-source-id: fc1024b3cd5650312ed47a1379f0d2cf8b2d8a8f
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由 Mark Rambacher 提交于
Summary: The ObjectRegistry class replaces the Registrar and NewCustomObjects. Objects are registered with the registry by Type (the class must implement the static const char *Type() method). This change is necessary for a few reasons: - By having a class (rather than static template instances), the class can be passed between compilation units, meaning that objects could be registered and shared from a dynamic library with an executable. - By having a class with instances, different units could have different objects registered. This could be useful if, for example, one Option allowed for a dynamic library and one did not. When combined with some other PRs (being able to load shared libraries, a Configurable interface to configure objects to/from string), this code will allow objects in external shared libraries to be added to a RocksDB image at run-time, rather than requiring every new extension to be built into the main library and called explicitly by every program. Test plan (on riversand963's devserver) ``` $COMPILE_WITH_ASAN=1 make -j32 all && sleep 1 && make check ``` All tests pass. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5293 Differential Revision: D16363396 Pulled By: riversand963 fbshipit-source-id: fbe4acb615bfc11103eef40a0b288845791c0180
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由 Levi Tamasi 提交于
Summary: RocksDB has historically stored uncompression dictionary objects in the block cache as opposed to storing just the block contents. This neccesitated evicting the object upon table close. With the new code, only the raw blocks are stored in the cache, eliminating the need for eviction. In addition, the patch makes the following improvements: 1) Compression dictionary blocks are now prefetched/pinned similarly to index/filter blocks. 2) A copy operation got eliminated when the uncompression dictionary is retrieved. 3) Errors related to retrieving the uncompression dictionary are propagated as opposed to silently ignored. Note: the patch temporarily breaks the compression dictionary evicition stats. They will be fixed in a separate phase. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5584 Test Plan: make asan_check Differential Revision: D16344151 Pulled By: ltamasi fbshipit-source-id: 2962b295f5b19628f9da88a3fcebbce5a5017a7b
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由 Eli Pozniansky 提交于
Summary: 1. Avoid creating the iterator in order to call BlockBasedTable::ApproximateOffsetOf(). Instead, directly call into it. 2. Optimize BlockBasedTable::ApproximateOffsetOf() keeps the index block iterator in stack. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5613 Differential Revision: D16442660 Pulled By: elipoz fbshipit-source-id: 9320be3e918c139b10e758cbbb684706d172e516
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由 sdong 提交于
Summary: Right now, ldb cannot scan a DB with merge operands with default ldb. There is no hard to give a general merge operator so that it can at least print out something Pull Request resolved: https://github.com/facebook/rocksdb/pull/5607 Test Plan: Run ldb against a DB with merge operands and see the outputs. Differential Revision: D16442634 fbshipit-source-id: c66c414ec07f219cfc6e6ec2cc14c783ee95df54
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由 anand76 提交于
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/5608 Test Plan: make check buck test mode/dev-tsan internal_repo_rocksdb/repo:file_reader_writer_test -- --run-disabled Differential Revision: D16441796 Pulled By: anand1976 fbshipit-source-id: afbb88a9fcb1c0ba22215118767e8eab3d1d6a4a
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- 23 7月, 2019 5 次提交
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由 Manuel Ung 提交于
Summary: There are a number of fixes in this PR (with most bugs found via the added stress tests): 1. Re-enable reseek optimization. This was initially disabled to avoid infinite loops in https://github.com/facebook/rocksdb/pull/3955 but this can be resolved by remembering not to reseek after a reseek has already been done. This problem only affects forward iteration in `DBIter::FindNextUserEntryInternal`, as we already disable reseeking in `DBIter::FindValueForCurrentKeyUsingSeek`. 2. Verify that ReadOption.snapshot can be safely used for iterator creation. Some snapshots would not give correct results because snaphsot validation would not be enforced, breaking some assumptions in Prev() iteration. 3. In the non-snapshot Get() case, reads done at `LastPublishedSequence` may not be enough, because unprepared sequence numbers are not published. Use `std::max(published_seq, max_visible_seq)` to do lookups instead. 4. Add stress test to test reading own writes. 5. Minor bug in the allow_concurrent_memtable_write case where we forgot to pass in batch_per_txn_. 6. Minor performance optimization in `CalcMaxUnpreparedSequenceNumber` by assigning by reference instead of value. 7. Add some more comments everywhere. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5573 Differential Revision: D16276089 Pulled By: lth fbshipit-source-id: 18029c944eb427a90a87dee76ac1b23f37ec1ccb
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由 Maysam Yabandeh 提交于
Summary: There are concerns about the correctness of this patch. Disabling by default until the concerns are resolved. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5606 Differential Revision: D16428064 Pulled By: maysamyabandeh fbshipit-source-id: a89280f0ea85796c9c9dfbfd9a8e91dad9b000b3
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由 sdong 提交于
Summary: Right now, users cannot take advantage of row cache, unless no snapshot is used, or Get() is repeated for the same snapshots. This limits the usage of row cache. This change eliminate this restriction in some cases. If the snapshot used is newer than the largest sequence number in the file, and write callback function is not registered, the same row cache key is used as no snapshot is given. We still need the callback function restriction for now because the callback function may filter out different keys for different snapshots even if the snapshots are new. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5600 Test Plan: Add a unit test. Differential Revision: D16386616 fbshipit-source-id: 6b7d214bd215d191b03ccf55926ad4b703ec2e53
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由 haoyuhuang 提交于
Summary: - Compute correlation between a few features and predictions, e.g., number of accesses since the last access vs number of accesses till the next access on a block. - Output human readable trace file so python can consume it. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5596 Test Plan: make clean && USE_CLANG=1 make check -j32 Differential Revision: D16373200 Pulled By: HaoyuHuang fbshipit-source-id: c848d26bc2e9210461f317d7dbee42d55be5a0cc
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由 Yanqin Jin 提交于
Summary: Atomic flush test started to fail after https://github.com/facebook/rocksdb/issues/5099. Then https://github.com/facebook/rocksdb/issues/5278 provided a fix after which the same error occurred much less frequently. However it still occur occasionally. Not sure what the root cause is. This PR disables the feature of snapshot list refresh, and we should keep an eye on the failure in the future. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5581 Differential Revision: D16295985 Pulled By: riversand963 fbshipit-source-id: c9e62e65133c52c21b07097de359632ca62571e4
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- 20 7月, 2019 4 次提交
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由 Eli Pozniansky 提交于
Summary: Added .watchmanconfig file to rocksdb repo. It is currently .gitignored. This allows to auto sync modified files with watchman when editing them remotely. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5593 Differential Revision: D16363860 Pulled By: elipoz fbshipit-source-id: 5ae221e21c6c757ceb08877771550d508f773d55
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由 anand76 提交于
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/5598 Test Plan: tsan_check valgrind_test Differential Revision: D16380167 Pulled By: anand1976 fbshipit-source-id: 2d0caea7d2d02a9606457f62811175d762b89d5c
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由 Eli Pozniansky 提交于
Summary: Added log_readahead_size option to control prefetching for Log::Reader. This is mostly useful for reading a remotely located log, as it can save the number of round-trips when reading it. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5592 Differential Revision: D16362989 Pulled By: elipoz fbshipit-source-id: c5d4d5245a44008cd59879640efff70c091ad3e8
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由 sdong 提交于
Summary: ldb idump now only works for default column family. Extend it. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5594 Test Plan: Compile and run the tool against a multiple CF DB. Differential Revision: D16380684 fbshipit-source-id: bfb8af36fdad1806837c90aaaab492d71528aceb
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- 19 7月, 2019 2 次提交
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由 anand76 提交于
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/5589 Test Plan: TEST_TMPDIR=/dev/shm/rocksdb COMPILE_WITH_ASAN=1 OPT=-g make J=64 -j64 asan_check Differential Revision: D16361081 Pulled By: anand1976 fbshipit-source-id: 09474832b9cfb318a840d4b633e22dfad105d58c
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由 Venki Pallipadi 提交于
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/5587 Differential Revision: D16359919 fbshipit-source-id: cfd9c448d79a8b8e7ac1d2b661d10151df269dba
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- 18 7月, 2019 5 次提交
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由 anand76 提交于
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/5588 Test Plan: make LITE=1 all check Differential Revision: D16354543 Pulled By: anand1976 fbshipit-source-id: 327a171439e183ac3a5e5057c511d6bca445e97d
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由 Eli Pozniansky 提交于
Summary: Fixing a corner case crash when there was no data read from file, but status is still OK Pull Request resolved: https://github.com/facebook/rocksdb/pull/5586 Differential Revision: D16348117 Pulled By: elipoz fbshipit-source-id: f97973308024f020d8be79ca3c56466b84d80656
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由 haoyuhuang 提交于
Summary: This PR traces the referenced key for Get for all types of blocks. This is useful when evaluating hybrid row-block caches. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5548 Test Plan: make clean && USE_CLANG=1 make check -j32 Differential Revision: D16157979 Pulled By: HaoyuHuang fbshipit-source-id: f6327411c9deb74e35e22a35f66cdbae09ab9d87
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由 Venki Pallipadi 提交于
Summary: Refresh of the earlier change here - https://github.com/facebook/rocksdb/issues/5135 This is a review request for code change needed for - https://github.com/facebook/rocksdb/issues/3469 "Add support for taking snapshot of a column family and creating column family from a given CF snapshot" We have an implementation for this that we have been testing internally. We have two new APIs that together provide this functionality. (1) ExportColumnFamily() - This API is modelled after CreateCheckpoint() as below. // Exports all live SST files of a specified Column Family onto export_dir, // returning SST files information in metadata. // - SST files will be created as hard links when the directory specified // is in the same partition as the db directory, copied otherwise. // - export_dir should not already exist and will be created by this API. // - Always triggers a flush. virtual Status ExportColumnFamily(ColumnFamilyHandle* handle, const std::string& export_dir, ExportImportFilesMetaData** metadata); Internally, the API will DisableFileDeletions(), GetColumnFamilyMetaData(), Parse through metadata, creating links/copies of all the sst files, EnableFileDeletions() and complete the call by returning the list of file metadata. (2) CreateColumnFamilyWithImport() - This API is modeled after IngestExternalFile(), but invoked only during a CF creation as below. // CreateColumnFamilyWithImport() will create a new column family with // column_family_name and import external SST files specified in metadata into // this column family. // (1) External SST files can be created using SstFileWriter. // (2) External SST files can be exported from a particular column family in // an existing DB. // Option in import_options specifies whether the external files are copied or // moved (default is copy). When option specifies copy, managing files at // external_file_path is caller's responsibility. When option specifies a // move, the call ensures that the specified files at external_file_path are // deleted on successful return and files are not modified on any error // return. // On error return, column family handle returned will be nullptr. // ColumnFamily will be present on successful return and will not be present // on error return. ColumnFamily may be present on any crash during this call. virtual Status CreateColumnFamilyWithImport( const ColumnFamilyOptions& options, const std::string& column_family_name, const ImportColumnFamilyOptions& import_options, const ExportImportFilesMetaData& metadata, ColumnFamilyHandle** handle); Internally, this API creates a new CF, parses all the sst files and adds it to the specified column family, at the same level and with same sequence number as in the metadata. Also performs safety checks with respect to overlaps between the sst files being imported. If incoming sequence number is higher than current local sequence number, local sequence number is updated to reflect this. Note, as the sst files is are being moved across Column Families, Column Family name in sst file will no longer match the actual column family on destination DB. The API does not modify Column Family name or id in the sst files being imported. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5495 Differential Revision: D16018881 fbshipit-source-id: 9ae2251025d5916d35a9fc4ea4d6707f6be16ff9
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由 Yuqi Gu 提交于
Summary: Crc32c Parallel computation optimization: Algorithm comes from Intel whitepaper: [crc-iscsi-polynomial-crc32-instruction-paper](https://www.intel.com/content/dam/www/public/us/en/documents/white-papers/crc-iscsi-polynomial-crc32-instruction-paper.pdf) Input data is divided into three equal-sized blocks Three parallel blocks (crc0, crc1, crc2) for 1024 Bytes One Block: 42(BLK_LENGTH) * 8(step length: crc32c_u64) bytes 1. crc32c_test: ``` [==========] Running 4 tests from 1 test case. [----------] Global test environment set-up. [----------] 4 tests from CRC [ RUN ] CRC.StandardResults [ OK ] CRC.StandardResults (1 ms) [ RUN ] CRC.Values [ OK ] CRC.Values (0 ms) [ RUN ] CRC.Extend [ OK ] CRC.Extend (0 ms) [ RUN ] CRC.Mask [ OK ] CRC.Mask (0 ms) [----------] 4 tests from CRC (1 ms total) [----------] Global test environment tear-down [==========] 4 tests from 1 test case ran. (1 ms total) [ PASSED ] 4 tests. ``` 2. RocksDB benchmark: db_bench --benchmarks="crc32c" ``` Linear Arm crc32c: crc32c: 1.005 micros/op 995133 ops/sec; 3887.2 MB/s (4096 per op) ``` ``` Parallel optimization with Armv8 crypto extension: crc32c: 0.419 micros/op 2385078 ops/sec; 9316.7 MB/s (4096 per op) ``` It gets ~2.4x speedup compared to linear Arm crc32c instructions. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5494 Differential Revision: D16340806 fbshipit-source-id: 95dae9a5b646fd20a8303671d82f17b2e162e945
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- 17 7月, 2019 2 次提交
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由 Eli Pozniansky 提交于
Summary: The 'refs' field in LRUHandle now counts only external references, since anyway we already have the IN_CACHE flag. This simplifies reference accounting logic a bit. Also cleaned up few asserts code as well as the comments - to be more readable. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5579 Differential Revision: D16286747 Pulled By: elipoz fbshipit-source-id: 7186d88f80f512ce584d0a303437494b5cbefd7f
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由 Eli Pozniansky 提交于
Summary: Added support for sequential read-ahead file that can prefetch the read data and later serve it from internal cache buffer. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5580 Differential Revision: D16287082 Pulled By: elipoz fbshipit-source-id: a3e7ad9643d377d39352ff63058ce050ec31dcf3
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