- 24 8月, 2021 4 次提交
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由 Merlin Mao 提交于
Summary: `TraceAnalyzer` privately inherits `TraceRecord::Handler` and `WriteBatch::Handler`. `trace_analyzer_test` can pass with this change. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8678 Reviewed By: zhichao-cao Differential Revision: D30459814 Pulled By: autopear fbshipit-source-id: a27f59ac4600f7c3682830c9b1d9dc79e53425be
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由 Jay Zhuang 提交于
Summary: Currently, we only provide job_id in RemoteCompaction APIs, the main problem of `job_id` is it cannot uniquely identify a compaction job between DB instances or between sessions. Providing DB and session id to the user, which will make building cross DB compaction service easier. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8680 Test Plan: unittest Reviewed By: ajkr Differential Revision: D30444859 Pulled By: jay-zhuang fbshipit-source-id: fdf107f4286564049637f154193c6d94c3c59448
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由 Peter Dillinger 提交于
Summary: To avoid getting "Didn't get expected error from Get" from crash test by enabling block-based filter in crash test in https://github.com/facebook/rocksdb/issues/8679. Basically, this applies the pattern of IGNORE_STATUS_IF_ERROR in full_filter_block.cc to block_based_filter_block.cc Pull Request resolved: https://github.com/facebook/rocksdb/pull/8695 Test Plan: watch for resolution of crash test runs Reviewed By: ltamasi Differential Revision: D30496748 Pulled By: pdillinger fbshipit-source-id: f7808fcf14c0e787fe81da03fa8303244590d273
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由 Peter Dillinger 提交于
Summary: fix typo Also, clarified change of C API signatures. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8694 Test Plan: visual Reviewed By: ltamasi Differential Revision: D30492882 Pulled By: pdillinger fbshipit-source-id: ac6dc3dcefa01c91fd87fc7f50279ea5e13fa41d
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- 23 8月, 2021 1 次提交
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由 mrambacher 提交于
Summary: Conditional compilation of static functions not used in LITE mode. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8689 Reviewed By: ltamasi Differential Revision: D30476218 Pulled By: mrambacher fbshipit-source-id: 5f3af90982d34818f47d2cb1d36dd5816d0333a5
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- 21 8月, 2021 8 次提交
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由 Levi Tamasi 提交于
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/8688 Reviewed By: ajkr, riversand963 Differential Revision: D30467746 Pulled By: ltamasi fbshipit-source-id: 0fce0d42fe2fe3cb56d7a89607154b3b957f09b6
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由 Peter Dillinger 提交于
Summary: I very recently realized that with https://github.com/facebook/rocksdb/issues/8669 we cannot later add file numbers to external SST files (so that more can share db session ids for better uniqueness properties), because of forward compatibility. We would have a version of RocksDB that assumes session IDs are unique on external SST files and therefore can't really break that invariant in future files. This change adds a table property for "orig_file_number" which is populated by normal SST files and also external SST files generated by SstFileWriter. SstFileWriter now keeps a db_session_id for life of the object and increments its own file numbers for embedding in table properties. (They are arguably "fake" file numbers because these numbers and not embedded in the file name.) While updating block_based_table_builder, I removed several unnecessary fields from Rep, because following the pattern would have created another unnecessary field. This change also updates block_based_table_reader to use this new property when available, which means that for newer SST files, we can determine the stable/original <db_session_id,file_number> unique identifier using just the file contents, not the file name. (It's a bit complicated; detailed comments in block_based_table_reader.) Also added DB host id to properties listing by sst_dump, which could be useful in debugging. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8686 Test Plan: majorly overhauled StableCacheKeys test for this change Reviewed By: zhichao-cao Differential Revision: D30457742 Pulled By: pdillinger fbshipit-source-id: 2e5ae7dddeb94fb9d8eac8a928486aed8b8cd445
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由 Peter Dillinger 提交于
Summary: With expected use for a 128-bit hash, xxhash library is upgraded to current dev (2c611a76f914828bed675f0f342d6c4199ffee1e) as of Aug 6 so that we can use production version of XXH3_128bits as new Hash128 function (added in hash128.h). To make this work, however, we have to carve out the "preview" version of XXH3 that is used in new SST Bloom and Ribbon filters, since that will not get maintenance in xxhash releases. I have consolidated all the relevant code into xxph3.h and made it "inline only" (no .cc file). The working name for this hash function is changed from XXH3p to XXPH3 (XX Preview Hash) because the latter is easier to get working with no symbol name conflicts between the headers. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8634 Test Plan: no expected change in existing functionality. For Hash128, added some unit tests based on those for Hash64 to ensure some basic properties and that the values do not change accidentally. Reviewed By: zhichao-cao Differential Revision: D30173490 Pulled By: pdillinger fbshipit-source-id: 06aa542a7a28b353bc2c865b9b2f8bdfe44158e4
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由 Peter Dillinger 提交于
Summary: This is essentially resurrection and fixing of the part of https://github.com/facebook/rocksdb/issues/8198 that was reverted in https://github.com/facebook/rocksdb/issues/8212, using data added in https://github.com/facebook/rocksdb/issues/8246. Basically, when configuring Ribbon filter, you can specify an LSM level before which Bloom will be used instead of Ribbon. But Bloom is only considered for Leveled and Universal compaction styles and file going into a known LSM level. This way, SST file writer, FIFO compaction, etc. use Ribbon filter as you would expect with NewRibbonFilterPolicy. So that this can be controlled with a single int value and so that flushes can be distinguished from intra-L0, we consider flush to go to level -1 for the purposes of this option. (Explained in API comment.) I also expect the most common and recommended Ribbon configuration to use Bloom during flush, to minimize slowing down writes and because according to my estimates, Ribbon only pays off if the structure lives in memory for more than an hour. Thus, I have changed the default for NewRibbonFilterPolicy to be this mild hybrid configuration. I don't really want to add something like NewHybridFilterPolicy because at least the mild hybrid configuration (Bloom for flush, Ribbon otherwise) should be considered a natural choice. C APIs also updated, but because they don't support overloading, rocksdb_filterpolicy_create_ribbon is kept pure ribbon for clarity and rocksdb_filterpolicy_create_ribbon_hybrid must be called for a hybrid configuration. While touching C API, I changed bits per key options from int to double. BuiltinFilterPolicy is needed so that LevelThresholdFilterPolicy doesn't inherit unused fields from BloomFilterPolicy. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8679 Test Plan: new + updated tests, including crash test Reviewed By: jay-zhuang Differential Revision: D30445797 Pulled By: pdillinger fbshipit-source-id: 6f5aeddfd6d79f7e55493b563c2d1d2d568892e1
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由 Merlin Mao 提交于
Summary: - Allow to get `Valid()`, `status()`, `key()` and `value()` of an iterator from `IteratorTraceExecutionResult`. - Move lower bound and upper bound from `IteratorSeekQueryTraceRecord` to `IteratorQueryTraceRecord`. Added test in `DBTest2.TraceAndReplay`. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8687 Reviewed By: zhichao-cao Differential Revision: D30457630 Pulled By: autopear fbshipit-source-id: be433099a25895b3aa6f0c00f95ad7b1d7489c1d
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由 anand76 提交于
Summary: Add a PerfContext counter. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8685 Reviewed By: zhichao-cao Differential Revision: D30453957 Pulled By: anand1976 fbshipit-source-id: 42888a3ced240e1c44446d52d3b04adfb01f5665
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由 anand76 提交于
Summary: MultiGet in block based table reader doesn't use BlockFetcher. As a result, the block_read_count and block_read_byte PerfContext counters were not being updated. This fixes that by updating them in MultiRead. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8676 Reviewed By: zhichao-cao Differential Revision: D30428680 Pulled By: anand1976 fbshipit-source-id: 21846efe92588fc17123665dd06733693a40126d
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由 Akanksha Mahajan 提交于
Summary: Pass BlobFileCompletionCallback in case of atomic flush and compaction job which is currently nullptr(default parameter). BlobFileCompletionCallback is used in case of IntegratedBlobDB to report new blob files to SstFileManager. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8681 Test Plan: CircleCI jobs Reviewed By: ltamasi Differential Revision: D30445998 Pulled By: akankshamahajan15 fbshipit-source-id: ba48093843864faec57f1f365cce7b5a569c4021
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- 20 8月, 2021 2 次提交
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由 Merlin Mao 提交于
Summary: Trace file V2 added lower/upper bounds to `Iterator::Seek()` and `Iterator::SeekForPrev()`. They were not used anywhere during the execution of a `TraceRecord`. Now they are added to be used by `ReadOptions` during `Iterator::Seek()` and `Iterator::SeekForPrev()` if they are set. Added test cases in `DBTest2.TraceAndManualReplay`. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8677 Reviewed By: zhichao-cao Differential Revision: D30438255 Pulled By: autopear fbshipit-source-id: 82563006be0b69155990e506a74951c18af8d288
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由 mrambacher 提交于
Summary: - Fix issue with OptionType::Vector when the nested item is a Customizable with no names - Fix issue with OptionType::Vector to appropriately wrap the elements in a Vector; - Fix an issue with nested Customizable object with a null immutable object still appearing in the mutable options; - Fix/Add tests for null/empty customizable objects - Move the RegisterTestObjects from customizable_test into testutil. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8566 Reviewed By: zhichao-cao Differential Revision: D30303724 Pulled By: mrambacher fbshipit-source-id: 33fa8ea2a3b663210cb356da05e64aab7585b1b5
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- 19 8月, 2021 3 次提交
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由 Baptiste Lemaire 提交于
Add condition on NotifyOnFlushComplete that FlushJob was not mempurge. Add event listeners to mempurge tests. (#8672) Summary: Previously, when a `FlushJob` was redirected to a MemPurge, the function `DBImpl::NotifyOnFlushComplete` was called, which created a series of issues because the JobInfo was not correctly collected from the memtables. This diff aims at correcting these two issues (`FlushJobInfo` collection in `FlushJob::MemPurge` , no call to `DBImpl::NotifyOnFlushComplete` after successful mempurge). Event listeners were added to the unit tests to handle these situations. Surprisingly none of the crashtests caught this issue, I will try to add event listeners to crash tests in the future. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8672 Reviewed By: akankshamahajan15 Differential Revision: D30383109 Pulled By: bjlemaire fbshipit-source-id: 35a8d4295886923ee4049a6447f00022cb221c73
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由 Merlin Mao 提交于
Summary: `Replayer::Execute()` can directly returns the result (e.g, request latency, DB::Get() return code, returned value, etc.) `Replayer::Replay()` reports the results via a callback function. New interface: `TraceRecordResult` in "rocksdb/trace_record_result.h". `DBTest2.TraceAndReplay` and `DBTest2.TraceAndManualReplay` are updated accordingly. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8657 Reviewed By: ajkr Differential Revision: D30290216 Pulled By: autopear fbshipit-source-id: 3c8d4e6b180ec743de1a9d9dcaee86064c74f0d6
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由 Peter Dillinger 提交于
Summary: Extends https://github.com/facebook/rocksdb/issues/8659 to work for ingested external SST files, even the same file ingested into different DBs sharing a block cache. Note: These new cache keys are currently only enabled when FileSystem does not provide GetUniqueId. For now, they are typically larger, so slightly less efficient. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8669 Test Plan: Extended unit test Reviewed By: zhichao-cao Differential Revision: D30398532 Pulled By: pdillinger fbshipit-source-id: 1f13e2af4b8bfff5741953a69466e9589fbc23c7
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- 18 8月, 2021 3 次提交
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由 Yanqin Jin 提交于
Summary: In debug mode, we are seeing assertion failure as follows ``` db/compaction/compaction_iterator.cc:980: void rocksdb::CompactionIterator::PrepareOutput(): \ Assertion `ikey_.type != kTypeDeletion && ikey_.type != kTypeSingleDeletion' failed. ``` It is caused by releasing earliest snapshot during compaction between the execution of `NextFromInput()` and `PrepareOutput()`. In one case, as demonstrated in unit test `WritePreparedTransaction.ReleaseEarliestSnapshotDuringCompaction_WithSD2`, incorrect result may be returned by a following range scan if we disable assertion, as in opt compilation level: the SingleDelete marker's sequence number is zeroed out, but the preceding PUT is also outputted to the SST file after compaction. Due to the logic of DBIter, the PUT will not be skipped and will be returned by iterator in range scan. https://github.com/facebook/rocksdb/issues/8661 illustrates what happened. Fix by taking a more conservative approach: make compaction zero out sequence number only if key is in the earliest snapshot when the compaction starts. Another assertion failure is ``` Assertion `current_user_key_snapshot_ == last_snapshot' failed. ``` It's caused by releasing the snapshot between the PUT and SingleDelete during compaction. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8608 Test Plan: make check Reviewed By: jay-zhuang Differential Revision: D30145645 Pulled By: riversand963 fbshipit-source-id: 699f58e66faf70732ad53810ccef43935d3bbe81
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由 Levi Tamasi 提交于
Summary: The patch adds statistics support to the integrated BlobDB implementation, namely the tickers `BLOB_DB_BLOB_FILE_BYTES_READ` and `BLOB_DB_GC_{NUM_KEYS,BYTES}_RELOCATED`, and the histograms `BLOB_DB_(DE)COMPRESSION_MICROS`. (Some other statistics, like `BLOB_DB_BLOB_FILE_BYTES_WRITTEN`, `BLOB_DB_BLOB_FILE_SYNCED`, `BLOB_DB_BLOB_FILE_{READ,WRITE,SYNC}_MICROS` were already supported.) Note that the vast majority of the old BlobDB's tickers/histograms are not really applicable to the new implementation, since they e.g. pertain to calling dedicated BlobDB APIs (which the integrated BlobDB does not have) or are tied to the legacy BlobDB's design of writing blob files synchronously when a write API is called. Such statistics are marked "legacy BlobDB only" in `statistics.h`. Fixes https://github.com/facebook/rocksdb/issues/8645 . Pull Request resolved: https://github.com/facebook/rocksdb/pull/8667 Test Plan: Ran `make check` and tested the new statistics using `db_bench`. Reviewed By: riversand963 Differential Revision: D30356884 Pulled By: ltamasi fbshipit-source-id: 5f8a833faee60401c5643c2f0a6c0415488190a4
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由 Jay Zhuang 提交于
Summary: Just like other per_level properties. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8668 Test Plan: stress_test Reviewed By: zhichao-cao Differential Revision: D30360967 Pulled By: jay-zhuang fbshipit-source-id: 70da2557b95c55e8081b04ebf1a909a0fe69488f
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- 17 8月, 2021 2 次提交
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由 anand76 提交于
Summary: Add a stat for secondary cache hits. The ```Cache::Lookup``` API had an unused ```stats``` parameter. This PR uses that to pass the pointer to a ```Statistics``` object that ```LRUCache``` uses to record the stat. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8666 Test Plan: Update a unit test in lru_cache_test Reviewed By: zhichao-cao Differential Revision: D30353816 Pulled By: anand1976 fbshipit-source-id: 2046f78b460428877a26ffdd2bb914ae47dfbe77
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由 Peter Dillinger 提交于
Summary: Use DB session ids in SST table properties to make cache keys stable across DB re-open and copy / move / restore / etc. These new cache keys are currently only enabled when FileSystem does not provide GetUniqueId. For now, they are typically larger, so slightly less efficient. Relevant to https://github.com/facebook/rocksdb/issues/7405 This change has a minor regression in PersistentCache functionality: metaindex blocks are no longer cached in PersistentCache. Table properties blocks already were not but ideally should be. I didn't spent effort to fix & test these issues because we don't believe PersistentCache is used much if at all and expect SecondaryCache to replace it. (Though PRs are welcome.) FIXME: there is more to be fixed for stable cache keys on external SST files Pull Request resolved: https://github.com/facebook/rocksdb/pull/8659 Test Plan: new unit test added, which fails when disabling new functionality Reviewed By: zhichao-cao Differential Revision: D30297705 Pulled By: pdillinger fbshipit-source-id: e8539a5c8802a79340405629870f2e3fb3822d3a
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- 16 8月, 2021 4 次提交
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由 Adam Retter 提交于
Summary: This is the `db_test2` parts of https://github.com/facebook/rocksdb/pull/7737 reworked on the latest HEAD. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8640 Reviewed By: akankshamahajan15 Differential Revision: D30303684 Pulled By: mrambacher fbshipit-source-id: 263e2f82d849bde4048b60aed8b31e7deed4706a
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由 Burton Li 提交于
Summary: - Use dynamic section size when calling IsSectorAligned() - Support relative path for GetSectorSize(). - Move buffer and sector alignment check to assert for better retail performance. - Typo fixes. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8613 Reviewed By: ajkr Differential Revision: D30136082 Pulled By: mrambacher fbshipit-source-id: e8cb849befdcae4fea99de5ed5dd6565e612425f
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由 Adam Retter 提交于
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/8554 Reviewed By: ajkr Differential Revision: D29756562 Pulled By: mrambacher fbshipit-source-id: ab2f5ef988c8ac7ea7c633e6a3dacaf16f021529
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由 Jay Zhuang 提交于
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/8644 Reviewed By: siying, zhichao-cao Differential Revision: D30236535 Pulled By: jay-zhuang fbshipit-source-id: 1758d1c46d83a5087560fb63d53a016bf999da81
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- 14 8月, 2021 1 次提交
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由 Baptiste Lemaire 提交于
Summary: Previously, the `MemPurge` sampling function was assessing whether a random entry from a memtable was garbage or not by simply querying the given memtable (see https://github.com/facebook/rocksdb/issues/8628 for more details). In this diff, I am updating the sampling function by querying not only the memtable the entry was drawn from, but also all subsequent memtables that have a greater memtable ID. I also added the size of the value for KV entries in the payload/useful payload estimates (which was also one of the reasons why sampling was not as good as mempurging all the time in terms of L0 SST files reduction). Once these changes were made, I was able to clean obsolete objects and functions from the `MemtableList` struct, and did a bit of cleanup everywhere. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8656 Reviewed By: pdillinger Differential Revision: D30288583 Pulled By: bjlemaire fbshipit-source-id: 7646a545ec56f4715949daa59ab5eee74540feb3
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- 13 8月, 2021 1 次提交
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由 Merlin Mao 提交于
Summary: - Remove extra `;` in trace_record.h - Remove some unnecessary `assert` in trace_record_handler.cc - Initialize `env_` after` exec_handler_` in `ReplayerImpl` to let db be asserted in creating the handler before getting `db->GetEnv()`. - Update history to include the new `TraceReader::Reset()` Pull Request resolved: https://github.com/facebook/rocksdb/pull/8652 Reviewed By: ajkr Differential Revision: D30276872 Pulled By: autopear fbshipit-source-id: 476ee162e0f241490c6209307448343a5b326b37
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- 12 8月, 2021 4 次提交
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由 Merlin Mao 提交于
Summary: New public interfaces: `TraceRecord` and `TraceRecord::Handler`, available in "rocksdb/trace_record.h". `Replayer`, available in `rocksdb/utilities/replayer.h`. User can use `DB::NewDefaultReplayer()` to create a Replayer to auto/manual replay a trace file. Unit tests: - `./db_test2 --gtest_filter="DBTest2.TraceAndReplay"`: Updated with the internal API changes. - `./db_test2 --gtest_filter="DBTest2.TraceAndManualReplay"`: New for manual replay. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8611 Reviewed By: ajkr Differential Revision: D30266329 Pulled By: autopear fbshipit-source-id: 1ecb3cbbedae0f6a67c18f0cc82e002b4d81b6f8
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由 Baptiste Lemaire 提交于
Summary: Current internal regression tests pass in an old option flag `experimental_allow_mempurge` to a more recently built db. This flag was retired and removed in a recent PR (https://github.com/facebook/rocksdb/issues/8628), and therefore, the following error comes up : `Failed: Invalid argument: Could not find option: : experimental_allow_mempurge`. In this PR, I reintroduce the two flags retired in https://github.com/facebook/rocksdb/issues/8628, `experimental_allow_mempurge` and `experimental_mempurge_policy` in `db_options.cc` and mark them both as `kDeprecated`. This is a temporary fix to save us time to find a long term solution, which hopefully will consist in ignoring options prefixed with `experimental_` that are no longer recognized. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8650 Reviewed By: pdillinger Differential Revision: D30257307 Pulled By: bjlemaire fbshipit-source-id: 35303655fd2dd9789fd9e3c450e9d8009f3c1f54
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由 Peter Dillinger 提交于
Summary: The last few releases overlooked adding to this test. This change fixes that. This change also fixes the problem of older branches not understanding ROCKSDB_NO_FBCODE and referencing compilers no longer supported. During the test, build_detect_platform is patched to force no FBCODE compiler usage. (We should not need to update old branches perpetually.) Pull Request resolved: https://github.com/facebook/rocksdb/pull/8651 Test Plan: local run reproduces regression described in https://github.com/facebook/rocksdb/issues/8650 Reviewed By: jay-zhuang, zhichao-cao Differential Revision: D30261872 Pulled By: pdillinger fbshipit-source-id: 02b447d224d7e0eb8613c63185437ded146713bc
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由 Jay Zhuang 提交于
Summary: Add comment for `options.allow_fallocate` that btrfs preallocated space are not freed and a suggestion to disable preallocation. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8646 Test Plan: No code change Reviewed By: ajkr Differential Revision: D30240050 Pulled By: jay-zhuang fbshipit-source-id: 75b7190bc8276ce8d8ac2d0cb9064b386cbf4768
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- 11 8月, 2021 2 次提交
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由 Baptiste Lemaire 提交于
Summary: Changes the API of the MemPurge process: the `bool experimental_allow_mempurge` and `experimental_mempurge_policy` flags have been replaced by a `double experimental_mempurge_threshold` option. This change of API reflects another major change introduced in this PR: the MemPurgeDecider() function now works by sampling the memtables being flushed to estimate the overall amount of useful payload (payload minus the garbage), and then compare this useful payload estimate with the `double experimental_mempurge_threshold` value. Therefore, when the value of this flag is `0.0` (default value), mempurge is simply deactivated. On the other hand, a value of `DBL_MAX` would be equivalent to always going through a mempurge regardless of the garbage ratio estimate. At the moment, a `double experimental_mempurge_threshold` value else than 0.0 or `DBL_MAX` is opnly supported`with the `SkipList` memtable representation. Regarding the sampling, this PR includes the introduction of a `MemTable::UniqueRandomSample` function that collects (approximately) random entries from the memtable by using the new `SkipList::Iterator::RandomSeek()` under the hood, or by iterating through each memtable entry, depending on the target sample size and the total number of entries. The unit tests have been readapted to support this new API. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8628 Reviewed By: pdillinger Differential Revision: D30149315 Pulled By: bjlemaire fbshipit-source-id: 1feef5390c95db6f4480ab4434716533d3947f27
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由 Levi Tamasi 提交于
Summary: The patch attempts to deflake `DBTestXactLogIterator.TransactionLogIteratorCorruptedLog` by disabling file deletions while retrieving the list of WAL files and truncating the first WAL file. This is to prevent the `PurgeObsoleteFiles` call triggered by `GetSortedWalFiles` from invalidating the result of `GetSortedWalFiles`. The patch also cleans up the test case a bit and changes it to using `test::TruncateFile` instead of calling the `truncate` syscall directly. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8627 Test Plan: `make check` Reviewed By: akankshamahajan15 Differential Revision: D30147002 Pulled By: ltamasi fbshipit-source-id: db11072a4ad8900a2f859cb5294e22b1888c23f6
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- 10 8月, 2021 4 次提交
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由 Andrew Kryczka 提交于
Summary: `GenericRateLimiter` slow path handles requests that cannot be satisfied immediately. Such requests enter a queue, and their thread stays in `Request()` until they are granted or the rate limiter is stopped. These threads are responsible for unblocking themselves. The work to do so is split into two main duties. (1) Waiting for the next refill time. (2) Refilling the bytes and granting requests. Prior to this PR, the slow path logic involved a leader election algorithm to pick one thread to perform (1) followed by (2). It elected the thread whose request was at the front of the highest priority non-empty queue since that request was most likely to be granted. This algorithm was efficient in terms of reducing intermediate wakeups, which is a thread waking up only to resume waiting after finding its request is not granted. However, the conceptual complexity of this algorithm was too high. It took me a long time to draw a timeline to understand how it works for just one edge case yet there were so many. This PR drops the leader election to reduce conceptual complexity. Now, the two duties can be performed by whichever thread acquires the lock first. The risk of this change is increasing the number of intermediate wakeups, however, we took steps to mitigate that. - `wait_until_refill_pending_` flag ensures only one thread performs (1). This\ prevents the thundering herd problem at the next refill time. The remaining\ threads wait on their condition variable with an unbounded duration -- thus we\ must remember to notify them to ensure forward progress. - (1) is typically done by a thread at the front of a queue. This is trivial\ when the queues are initially empty as the first choice that arrives must be\ the only entry in its queue. When queues are initially non-empty, we achieve\ this by having (2) notify a thread at the front of a queue (preferring higher\ priority) to perform the next duty. - We do not require any additional wakeup for (2). Typically it will just be\ done by the thread that finished (1). Combined, the second and third bullet points above suggest the refill/granting will typically be done by a request at the front of its queue. This is important because one wakeup is saved when a granted request happens to be in an already running thread. Note there are a few cases that still lead to intermediate wakeup, however. The first two are existing issues that also apply to the old algorithm, however, the third (including both subpoints) is new. - No request may be granted (only possible when rate limit dynamically\ decreases). - Requests from a different queue may be granted. - (2) may be run by a non-front request thread causing it to not be granted even\ if some requests in that same queue are granted. It can happen for a couple\ (unlikely) reasons. - A new request may sneak in and grab the lock at the refill time, before the\ thread finishing (1) can wake up and grab it. - A new request may sneak in and grab the lock and execute (1) before (2)'s\ chosen candidate can wake up and grab the lock. Then that non-front request\ thread performing (1) can carry over to perform (2). Pull Request resolved: https://github.com/facebook/rocksdb/pull/8602 Test Plan: - Use existing tests. The edge cases listed in the comment are all performance\ related; I could not really think of any related to correctness. The logic\ looks the same whether a thread wakes up/finishes its work early/on-time/late,\ or whether the thread is chosen vs. "steals" the work. - Verified write throughput and CPU overhead are basically the same with and\ without this change, even in a rate limiter heavy workload: Test command: ``` $ rm -rf /dev/shm/dbbench/ && TEST_TMPDIR=/dev/shm /usr/bin/time ./db_bench -benchmarks=fillrandom -num_multi_db=64 -num_low_pri_threads=64 -num_high_pri_threads=64 -write_buffer_size=262144 -target_file_size_base=262144 -max_bytes_for_level_base=1048576 -rate_limiter_bytes_per_sec=16777216 -key_size=24 -value_size=1000 -num=10000 -compression_type=none -rate_limiter_refill_period_us=1000 ``` Results before this PR: ``` fillrandom : 108.463 micros/op 9219 ops/sec; 9.0 MB/s 7.40user 8.84system 1:26.20elapsed 18%CPU (0avgtext+0avgdata 256140maxresident)k ``` Results after this PR: ``` fillrandom : 108.108 micros/op 9250 ops/sec; 9.0 MB/s 7.45user 8.23system 1:26.68elapsed 18%CPU (0avgtext+0avgdata 255688maxresident)k ``` Reviewed By: hx235 Differential Revision: D30048013 Pulled By: ajkr fbshipit-source-id: 6741bba9d9dfbccab359806d725105817fef818b
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由 Lucian Grijincu 提交于
Summary: UBSAN revealed a pointer underflow when `LZ4HC_init_internal` is called with a null `start`. Reviewed By: ajkr Differential Revision: D30181874 fbshipit-source-id: ca9bbac1a85c58782871d7f153af733b000cc66c
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由 Jay Zhuang 提交于
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/8631 Reviewed By: siying Differential Revision: D30200385 Pulled By: jay-zhuang fbshipit-source-id: 0fa2bb15e74ff81762d767f234078e0fe0106c55
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由 sdong 提交于
Summary: Some FIFO users want to keep the data for longer, but the old data is rarely accessed. This feature allows users to configure FIFO compaction so that data older than a threshold is moved to a warm storage tier. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8310 Test Plan: Add several unit tests. Reviewed By: ajkr Differential Revision: D28493792 fbshipit-source-id: c14824ea634814dee5278b449ab5c98b6e0b5501
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- 08 8月, 2021 1 次提交
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由 Akanksha Mahajan 提交于
Summary: FaultInjectionTestFS injects error in Rename operation. Because of injected error, info.log fails to be created if rename returns error and info_log is set to nullptr which leads to this assertion Pull Request resolved: https://github.com/facebook/rocksdb/pull/8632 Test Plan: run the db_stress job locally Reviewed By: ajkr Differential Revision: D30167387 Pulled By: akankshamahajan15 fbshipit-source-id: 8d08c4c33e8f0cabd368bbb498d21b9de0660067
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