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| Author | SHA1 | Message | Date |
|---|---|---|---|
Yanqin Jin
|
1777e5f7e9 |
Snapshots with user-specified timestamps (#9879)
Summary: In RocksDB, keys are associated with (internal) sequence numbers which denote when the keys are written to the database. Sequence numbers in different RocksDB instances are unrelated, thus not comparable. It is nice if we can associate sequence numbers with their corresponding actual timestamps. One thing we can do is to support user-defined timestamp, which allows the applications to specify the format of custom timestamps and encode a timestamp with each key. More details can be found at https://github.com/facebook/rocksdb/wiki/User-defined-Timestamp-%28Experimental%29. This PR provides a different but complementary approach. We can associate rocksdb snapshots (defined in https://github.com/facebook/rocksdb/blob/7.2.fb/include/rocksdb/snapshot.h#L20) with **user-specified** timestamps. Since a snapshot is essentially an object representing a sequence number, this PR establishes a bi-directional mapping between sequence numbers and timestamps. In the past, snapshots are usually taken by readers. The current super-version is grabbed, and a `rocksdb::Snapshot` object is created with the last published sequence number of the super-version. You can see that the reader actually has no good idea of what timestamp to assign to this snapshot, because by the time the `GetSnapshot()` is called, an arbitrarily long period of time may have already elapsed since the last write, which is when the last published sequence number is written. This observation motivates the creation of "timestamped" snapshots on the write path. Currently, this functionality is exposed only to the layer of `TransactionDB`. Application can tell RocksDB to create a snapshot when a transaction commits, effectively associating the last sequence number with a timestamp. It is also assumed that application will ensure any two snapshots with timestamps should satisfy the following: ``` snapshot1.seq < snapshot2.seq iff. snapshot1.ts < snapshot2.ts ``` If the application can guarantee that when a reader takes a timestamped snapshot, there is no active writes going on in the database, then we also allow the user to use a new API `TransactionDB::CreateTimestampedSnapshot()` to create a snapshot with associated timestamp. Code example ```cpp // Create a timestamped snapshot when committing transaction. txn->SetCommitTimestamp(100); txn->SetSnapshotOnNextOperation(); txn->Commit(); // A wrapper API for convenience Status Transaction::CommitAndTryCreateSnapshot( std::shared_ptr<TransactionNotifier> notifier, TxnTimestamp ts, std::shared_ptr<const Snapshot>* ret); // Create a timestamped snapshot if caller guarantees no concurrent writes std::pair<Status, std::shared_ptr<const Snapshot>> snapshot = txn_db->CreateTimestampedSnapshot(100); ``` The snapshots created in this way will be managed by RocksDB with ref-counting and potentially shared with other readers. We provide the following APIs for readers to retrieve a snapshot given a timestamp. ```cpp // Return the timestamped snapshot correponding to given timestamp. If ts is // kMaxTxnTimestamp, then we return the latest timestamped snapshot if present. // Othersise, we return the snapshot whose timestamp is equal to `ts`. If no // such snapshot exists, then we return null. std::shared_ptr<const Snapshot> TransactionDB::GetTimestampedSnapshot(TxnTimestamp ts) const; // Return the latest timestamped snapshot if present. std::shared_ptr<const Snapshot> TransactionDB::GetLatestTimestampedSnapshot() const; ``` We also provide two additional APIs for stats collection and reporting purposes. ```cpp Status TransactionDB::GetAllTimestampedSnapshots( std::vector<std::shared_ptr<const Snapshot>>& snapshots) const; // Return timestamped snapshots whose timestamps fall in [ts_lb, ts_ub) and store them in `snapshots`. Status TransactionDB::GetTimestampedSnapshots( TxnTimestamp ts_lb, TxnTimestamp ts_ub, std::vector<std::shared_ptr<const Snapshot>>& snapshots) const; ``` To prevent the number of timestamped snapshots from growing infinitely, we provide the following API to release timestamped snapshots whose timestamps are older than or equal to a given threshold. ```cpp void TransactionDB::ReleaseTimestampedSnapshotsOlderThan(TxnTimestamp ts); ``` Before shutdown, RocksDB will release all timestamped snapshots. Comparison with user-defined timestamp and how they can be combined: User-defined timestamp persists every key with a timestamp, while timestamped snapshots maintain a volatile mapping between snapshots (sequence numbers) and timestamps. Different internal keys with the same user key but different timestamps will be treated as different by compaction, thus a newer version will not hide older versions (with smaller timestamps) unless they are eligible for garbage collection. In contrast, taking a timestamped snapshot at a certain sequence number and timestamp prevents all the keys visible in this snapshot from been dropped by compaction. Here, visible means (seq < snapshot and most recent). The timestamped snapshot supports the semantics of reading at an exact point in time. Timestamped snapshots can also be used with user-defined timestamp. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9879 Test Plan: ``` make check TEST_TMPDIR=/dev/shm make crash_test_with_txn ``` Reviewed By: siying Differential Revision: D35783919 Pulled By: riversand963 fbshipit-source-id: 586ad905e169189e19d3bfc0cb0177a7239d1bd4 |
3 years ago |
|
Akanksha Mahajan
|
ecfd4aef0c |
Enable wal_compression in crash_tests (#10141)
Summary: Same as title Pull Request resolved: https://github.com/facebook/rocksdb/pull/10141 Test Plan: ``` export CRASH_TEST_EXT_ARGS=" --wal_compression=zstd" make crash_test -j ``` Reviewed By: riversand963 Differential Revision: D37042810 Pulled By: akankshamahajan15 fbshipit-source-id: 53f0793d78241f1b5c954dcc808cb4c0a3e9172a |
3 years ago |
|
Yanqin Jin
|
f890527b16 |
Update test for secondary instance in stress test (#10121)
Summary: This PR updates secondary instance testing in stress test by default. A background thread will be started (disabled by default), running a secondary instance tailing the logs of the primary. Periodically (every 1 sec), this thread calls `TryCatchUpWithPrimary()` and uses point lookup or range scan to read some random keys with only very basic verification to make sure no assertion failure is triggered. Thanks to https://github.com/facebook/rocksdb/issues/10061 , we can enable secondary instance when user-defined timestamp is enabled. Also removed a less useful test configuration, `secondary_catch_up_one_in`. This is very similar to the periodic catch-up. In the last commit, I decided not to enable it now, but just update the tests, since secondary instance does not work well when the underlying file is renamed by primary, e.g. SstFileManager. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10121 Test Plan: ``` TEST_TMPDIR=/dev/shm/rocksdb make crash_test TEST_TMPDIR=/dev/shm/rocksdb make crash_test_with_ts TEST_TMPDIR=/dev/shm/rocksdb make crash_test_with_atomic_flush ``` Reviewed By: ajkr Differential Revision: D36939458 Pulled By: riversand963 fbshipit-source-id: 1c065b7efc3690fc341569b9d369a5cbd8ef6b3e |
3 years ago |
|
Yanqin Jin
|
2b3c50c429 |
Temporarily disable wal compression (#10108)
Summary: Will re-enable after fixing the bug in https://github.com/facebook/rocksdb/issues/10099 and https://github.com/facebook/rocksdb/issues/10097. Right now, the priority is https://github.com/facebook/rocksdb/issues/10087, but the bug in WAL compression prevents the mini crash test from passing. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10108 Reviewed By: pdillinger Differential Revision: D36897214 Pulled By: riversand963 fbshipit-source-id: d64dc52738222d5f66003f7731dc46eaeed812be |
3 years ago |
|
Gang Liao
|
e6432dfd4c |
Make it possible to enable blob files starting from a certain LSM tree level (#10077)
Summary: Currently, if blob files are enabled (i.e. `enable_blob_files` is true), large values are extracted both during flush/recovery (when SST files are written into level 0 of the LSM tree) and during compaction into any LSM tree level. For certain use cases that have a mix of short-lived and long-lived values, it might make sense to support extracting large values only during compactions whose output level is greater than or equal to a specified LSM tree level (e.g. compactions into L1/L2/... or above). This could reduce the space amplification caused by large values that are turned into garbage shortly after being written at the price of some write amplification incurred by long-lived values whose extraction to blob files is delayed. In order to achieve this, we would like to do the following: - Add a new configuration option `blob_file_starting_level` (default: 0) to `AdvancedColumnFamilyOptions` (and `MutableCFOptions` and extend the related logic) - Instantiate `BlobFileBuilder` in `BuildTable` (used during flush and recovery, where the LSM tree level is L0) and `CompactionJob` iff `enable_blob_files` is set and the LSM tree level is `>= blob_file_starting_level` - Add unit tests for the new functionality, and add the new option to our stress tests (`db_stress` and `db_crashtest.py` ) - Add the new option to our benchmarking tool `db_bench` and the BlobDB benchmark script `run_blob_bench.sh` - Add the new option to the `ldb` tool (see https://github.com/facebook/rocksdb/wiki/Administration-and-Data-Access-Tool) - Ideally extend the C and Java bindings with the new option - Update the BlobDB wiki to document the new option. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10077 Reviewed By: ltamasi Differential Revision: D36884156 Pulled By: gangliao fbshipit-source-id: 942bab025f04633edca8564ed64791cb5e31627d |
3 years ago |
|
Guido Tagliavini Ponce
|
b4d0e041d0 |
Add support for FastLRUCache in stress and crash tests. (#10081)
Summary: Stress tests can run with the experimental FastLRUCache. Crash tests randomly choose between LRUCache and FastLRUCache. Since only LRUCache supports a secondary cache, we validate the `--secondary_cache_uri` and `--cache_type` flags---when `--secondary_cache_uri` is set, the `--cache_type` is set to `lru_cache`. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10081 Test Plan: - To test that the FastLRUCache is used and the stress test runs successfully, run `make -j24 CRASH_TEST_EXT_ARGS=—duration=960 blackbox_crash_test_with_atomic_flush`. The cache type should sometimes be `fast_lru_cache`. - To test the flag validation, run `make -j24 CRASH_TEST_EXT_ARGS="--duration=960 --secondary_cache_uri=x" blackbox_crash_test_with_atomic_flush` multiple times. The test will always be aborted (which is okay). Check that the cache type is always `lru_cache`. Reviewed By: anand1976 Differential Revision: D36839908 Pulled By: guidotag fbshipit-source-id: ebcdfdcd12ec04c96c09ae5b9c9d1e613bdd1725 |
3 years ago |
|
Andrew Kryczka
|
f6e45382e9 |
Disable file ingestion in crash test for CF consistency (#10067)
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/10067 Reviewed By: jay-zhuang Differential Revision: D36727948 Pulled By: ajkr fbshipit-source-id: a3502730412c01ba63d822a5d4bf56f8bae8fcb2 |
3 years ago |
|
Andrew Kryczka
|
91ba7837b7 |
Enable IngestExternalFile() in crash test (#9357)
Summary: Thanks to https://github.com/facebook/rocksdb/issues/9919 and https://github.com/facebook/rocksdb/issues/10051 the known bugs in file ingestion (besides mmap read + file checksum) are fixed. Now we can try again to enable file ingestion in crash test. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9357 Test Plan: stress file ingestion heavily for an hour: `$ TEST_TMPDIR=/dev/shm python3 tools/db_crashtest.py blackbox --max_key=1000000 --ingest_external_file_one_in=100 --duration=3600 --interval=20 --write_buffer_size=524288 --target_file_size_base=524288 --max_bytes_for_level_base=2097152` Reviewed By: riversand963 Differential Revision: D33410746 Pulled By: ajkr fbshipit-source-id: d276431390995a67f68390d61c06a40945fdd280 |
3 years ago |
|
Yanqin Jin
|
9901e7f681 |
Enable checkpoint and backup in db_stress when timestamp is enabled (#10047)
Summary: After https://github.com/facebook/rocksdb/issues/10030 and https://github.com/facebook/rocksdb/issues/10004, we can enable checkpoint and backup in stress tests when user-defined timestamp is enabled. This PR has no production risk. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10047 Test Plan: ``` TEST_TMPDIR=/dev/shm make crash_test_with_ts ``` Reviewed By: jowlyzhang Differential Revision: D36641565 Pulled By: riversand963 fbshipit-source-id: d86c9d87efcc34c32d1aa176af691d32b897644a |
3 years ago |
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Changyu Bi
|
cc23b46da1 |
Support using ZDICT_finalizeDictionary to generate zstd dictionary (#9857)
Summary:
An untrained dictionary is currently simply the concatenation of several samples. The ZSTD API, ZDICT_finalizeDictionary(), can improve such a dictionary's effectiveness at low cost. This PR changes how dictionary is created by calling the ZSTD ZDICT_finalizeDictionary() API instead of creating raw content dictionary (when max_dict_buffer_bytes > 0), and pass in all buffered uncompressed data blocks as samples.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9857
Test Plan:
#### db_bench test for cpu/memory of compression+decompression and space saving on synthetic data:
Set up: change the parameter [here](
|
3 years ago |
|
Jay Zhuang
|
c6d326d3d7 |
Track SST unique id in MANIFEST and verify (#9990)
Summary: Start tracking SST unique id in MANIFEST, which is used to verify with SST properties to make sure the SST file is not overwritten or misplaced. A DB option `try_verify_sst_unique_id` is introduced to enable/disable the verification, if enabled, it opens all SST files during DB-open to read the unique_id from table properties (default is false), so it's recommended to use it with `max_open_files = -1` to pre-open the files. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9990 Test Plan: unittests, format-compatible test, mini-crash Reviewed By: anand1976 Differential Revision: D36381863 Pulled By: jay-zhuang fbshipit-source-id: 89ea2eb6b35ed3e80ead9c724eb096083eaba63f |
3 years ago |
|
Hui Xiao
|
3573558ec5 |
Rewrite memory-charging feature's option API (#9926)
Summary: **Context:** Previous PR https://github.com/facebook/rocksdb/pull/9748, https://github.com/facebook/rocksdb/pull/9073, https://github.com/facebook/rocksdb/pull/8428 added separate flag for each charged memory area. Such API design is not scalable as we charge more and more memory areas. Also, we foresee an opportunity to consolidate this feature with other cache usage related features such as `cache_index_and_filter_blocks` using `CacheEntryRole`. Therefore we decided to consolidate all these flags with `CacheUsageOptions cache_usage_options` and this PR serves as the first step by consolidating memory-charging related flags. **Summary:** - Replaced old API reference with new ones, including making `kCompressionDictionaryBuildingBuffer` opt-out and added a unit test for that - Added missing db bench/stress test for some memory charging features - Renamed related test suite to indicate they are under the same theme of memory charging - Refactored a commonly used mocked cache component in memory charging related tests to reduce code duplication - Replaced the phrases "memory tracking" / "cache reservation" (other than CacheReservationManager-related ones) with "memory charging" for standard description of this feature. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9926 Test Plan: - New unit test for opt-out `kCompressionDictionaryBuildingBuffer` `TEST_F(ChargeCompressionDictionaryBuildingBufferTest, Basic)` - New unit test for option validation/sanitization `TEST_F(CacheUsageOptionsOverridesTest, SanitizeAndValidateOptions)` - CI - db bench (in case querying new options introduces regression) **+0.5% micros/op**: `TEST_TMPDIR=/dev/shm/testdb ./db_bench -benchmarks=fillseq -db=$TEST_TMPDIR -charge_compression_dictionary_building_buffer=1(remove this for comparison) -compression_max_dict_bytes=10000 -disable_auto_compactions=1 -write_buffer_size=100000 -num=4000000 | egrep 'fillseq'` #-run | (pre-PR) avg micros/op | std micros/op | (post-PR) micros/op | std micros/op | change (%) -- | -- | -- | -- | -- | -- 10 | 3.9711 | 0.264408 | 3.9914 | 0.254563 | 0.5111933721 20 | 3.83905 | 0.0664488 | 3.8251 | 0.0695456 | **-0.3633711465** 40 | 3.86625 | 0.136669 | 3.8867 | 0.143765 | **0.5289363078** - db_stress: `python3 tools/db_crashtest.py blackbox -charge_compression_dictionary_building_buffer=1 -charge_filter_construction=1 -charge_table_reader=1 -cache_size=1` killed as normal Reviewed By: ajkr Differential Revision: D36054712 Pulled By: hx235 fbshipit-source-id: d406e90f5e0c5ea4dbcb585a484ad9302d4302af |
3 years ago |
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Yanqin Jin
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f6d9730ea1 |
Fix stress test with best-efforts-recovery (#9986)
Summary: This PR - since we are testing with disable_wal = true and best_efforts_recovery, we should set column family count to 1, due to the requirement of `ExpectedState` tracking and replaying logic. - during backup and checkpoint restore, disable best-efforts-recovery. This does not matter now because db_crashtest.py always disables wal when testing best-efforts-recovery. In the future, if we enable wal, then not setting `restore_opitions.best_efforts_recovery` will cause backup db not to recover the WALs, and differ from db (that enables WAL). - during verification of backup and checkpoint restore, print the key where inconsistency exists between expected state and db. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9986 Test Plan: TEST_TMPDIR=/dev/shm/rocksdb make crash_test_with_best_efforts_recovery Reviewed By: siying Differential Revision: D36353105 Pulled By: riversand963 fbshipit-source-id: a484da161273e6216a1f7e245bac15a349693917 |
3 years ago |
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Andrew Kryczka
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e943bbdd2f |
Temporarily disable sync_fault_injection (#9979)
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/9979 Reviewed By: siying Differential Revision: D36301555 Pulled By: ajkr fbshipit-source-id: ed298d3484b6aad3ef19746e984bf4c52be33a9f |
3 years ago |
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Andrew Kryczka
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62d84e2a2b |
db_stress fault injection in release mode (#9957)
Summary: Previously all fault injection was ignored in release mode. This PR adds it back except for read fault injection (`--read_fault_one_in > 0`) since its dependency (`IGNORE_STATUS_IF_ERROR`) is unavailable in release mode. Other notable changes include: - Moved `EnableWriteErrorInjection()` for `--write_fault_one_in > 0` so it's after `DB::Open()` without depending on `SyncPoint` - Made `--read_fault_one_in > 0` return an error in release mode - Updated `db_crashtest.py` to always set `--read_fault_one_in=0` in release mode Pull Request resolved: https://github.com/facebook/rocksdb/pull/9957 Test Plan: ``` $ DEBUG_LEVEL=0 make -j24 db_stress $ DEBUG_LEVEL=0 TEST_TMPDIR=/dev/shm python3 tools/db_crashtest.py blackbox ``` Reviewed By: anand1976 Differential Revision: D36193830 Pulled By: ajkr fbshipit-source-id: 0b97946b4e3f06e3e0f6e7833c2763da08ec5321 |
3 years ago |
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Andrew Kryczka
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a62506aee2 |
Enable unsynced data loss in crash test (#9947)
Summary:
`db_stress` already tracks expected state history to verify prefix-recoverability when `sync_fault_injection` is enabled. This PR enables `sync_fault_injection` in `db_crashtest.py`.
Previously enabling `sync_fault_injection` would cause whole unsynced files to be dropped. This PR adds a more interesting case of losing only the tail of unsynced data by implementing `TestFSWritableFile::RangeSync()` and enabling `{wal_,}bytes_per_sync`.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9947
Test Plan:
- regular blackbox, blackbox --simple
- various commands to stress this new case, such as `TEST_TMPDIR=/dev/shm python3 tools/db_crashtest.py blackbox --max_key=100000 --write_buffer_size=2097152 --avoid_flush_during_recovery=1 --disable_wal=0 --interval=10 --db_write_buffer_size=0 --sync_fault_injection=1 --wal_compression=none --delpercent=0 --delrangepercent=0 --prefixpercent=0 --iterpercent=0 --writepercent=100 --readpercent=0 --wal_bytes_per_sync=131072 --duration=36000 --sync=0 --open_write_fault_one_in=16`
Reviewed By: riversand963
Differential Revision: D36152775
Pulled By: ajkr
fbshipit-source-id: 44b68a7fad0a4cf74af9fe1f39be01baab8141d8
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3 years ago |
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Yanqin Jin
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06394ff4e7 |
Fix a bug of CompactionIterator/CompactionFilter using `Delete` (#9929)
Summary: When compaction filter determines that a key should be removed, it updates the internal key's type to `Delete`. If this internal key is preserved in current compaction but seen by a later compaction together with `SingleDelete`, it will cause compaction iterator to return Corruption. To fix the issue, compaction filter should return more information in addition to the intention of removing a key. Therefore, we add a new `kRemoveWithSingleDelete` to `CompactionFilter::Decision`. Seeing `kRemoveWithSingleDelete`, compaction iterator will update the op type of the internal key to `kTypeSingleDelete`. In addition, I updated db_stress_shared_state.[cc|h] so that `no_overwrite_ids_` becomes `const`. It is easier to reason about thread-safety if accessed from multiple threads. This information is passed to `PrepareTxnDBOptions()` when calling from `Open()` so that we can set up the rollback deletion type callback for transactions. Finally, disable compaction filter for multiops_txn because the key removal logic of `DbStressCompactionFilter` does not quite work with `MultiOpsTxnsStressTest`. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9929 Test Plan: make check make crash_test make crash_test_with_txn Reviewed By: anand1976 Differential Revision: D36069678 Pulled By: riversand963 fbshipit-source-id: cedd2f1ba958af59ad3916f1ba6f424307955f92 |
3 years ago |
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Yanqin Jin
|
94e245a14d |
Improve stress test for MultiOpsTxnsStressTest (#9829)
Summary: Adds more coverage to `MultiOpsTxnsStressTest` with a focus on write-prepared transactions. 1. Add a hack to manually evict commit cache entries. We currently cannot assign small values to `wp_commit_cache_bits` because it requires a prepared transaction to commit within a certain range of sequence numbers, otherwise it will throw. 2. Add coverage for commit-time-write-batch. If write policy is write-prepared, we need to set `use_only_the_last_commit_time_batch_for_recovery` to true. 3. After each flush/compaction, verify data consistency. This is possible since data size can be small: default numbers of primary/secondary keys are just 1000. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9829 Test Plan: ``` TEST_TMPDIR=/dev/shm/rocksdb_crashtest_blackbox/ make blackbox_crash_test_with_multiops_wp_txn ``` Reviewed By: pdillinger Differential Revision: D35806678 Pulled By: riversand963 fbshipit-source-id: d7fde7a29fda0fb481a61f553e0ca0c47da93616 |
3 years ago |
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anand76
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c3d7e16252 |
Add WAL compression to stress tests (#9811)
Summary: Add the WAL compression feature to the stress test. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9811 Reviewed By: riversand963 Differential Revision: D35414316 Pulled By: anand1976 fbshipit-source-id: 0c17b1ec55679a52f088ad368798b57139bd921a |
3 years ago |
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Hui Xiao
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49623f9c8e |
Account memory of big memory users in BlockBasedTable in global memory limit (#9748)
Summary: **Context:** Through heap profiling, we discovered that `BlockBasedTableReader` objects can accumulate and lead to high memory usage (e.g, `max_open_file = -1`). These memories are currently not saved, not tracked, not constrained and not cache evict-able. As a first step to improve this, similar to https://github.com/facebook/rocksdb/pull/8428, this PR is to track an estimate of `BlockBasedTableReader` object's memory in block cache and fail future creation if the memory usage exceeds the available space of cache at the time of creation. **Summary:** - Approximate big memory users (`BlockBasedTable::Rep` and `TableProperties` )' memory usage in addition to the existing estimated ones (filter block/index block/un-compression dictionary) - Charge all of these memory usages to block cache on `BlockBasedTable::Open()` and release them on `~BlockBasedTable()` as there is no memory usage fluctuation of concern in between - Refactor on CacheReservationManager (and its call-sites) to add concurrent support for BlockBasedTable used in this PR. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9748 Test Plan: - New unit tests - db bench: `OpenDb` : **-0.52% in ms** - Setup `./db_bench -benchmarks=fillseq -db=/dev/shm/testdb -disable_auto_compactions=1 -write_buffer_size=1048576` - Repeated run with pre-change w/o feature and post-change with feature, benchmark `OpenDb`: `./db_bench -benchmarks=readrandom -use_existing_db=1 -db=/dev/shm/testdb -reserve_table_reader_memory=true (remove this when running w/o feature) -file_opening_threads=3 -open_files=-1 -report_open_timing=true| egrep 'OpenDb:'` #-run | (feature-off) avg milliseconds | std milliseconds | (feature-on) avg milliseconds | std milliseconds | change (%) -- | -- | -- | -- | -- | -- 10 | 11.4018 | 5.95173 | 9.47788 | 1.57538 | -16.87382694 20 | 9.23746 | 0.841053 | 9.32377 | 1.14074 | 0.9343477536 40 | 9.0876 | 0.671129 | 9.35053 | 1.11713 | 2.893283155 80 | 9.72514 | 2.28459 | 9.52013 | 1.0894 | -2.108041632 160 | 9.74677 | 0.991234 | 9.84743 | 1.73396 | 1.032752389 320 | 10.7297 | 5.11555 | 10.547 | 1.97692 | **-1.70275031** 640 | 11.7092 | 2.36565 | 11.7869 | 2.69377 | **0.6635807741** - db bench on write with cost to cache in WriteBufferManager (just in case this PR's CRM refactoring accidentally slows down anything in WBM) : `fillseq` : **+0.54% in micros/op** `./db_bench -benchmarks=fillseq -db=/dev/shm/testdb -disable_auto_compactions=1 -cost_write_buffer_to_cache=true -write_buffer_size=10000000000 | egrep 'fillseq'` #-run | (pre-PR) avg micros/op | std micros/op | (post-PR) avg micros/op | std micros/op | change (%) -- | -- | -- | -- | -- | -- 10 | 6.15 | 0.260187 | 6.289 | 0.371192 | 2.260162602 20 | 7.28025 | 0.465402 | 7.37255 | 0.451256 | 1.267813605 40 | 7.06312 | 0.490654 | 7.13803 | 0.478676 | **1.060579461** 80 | 7.14035 | 0.972831 | 7.14196 | 0.92971 | **0.02254791432** - filter bench: `bloom filter`: **-0.78% in ms/key** - ` ./filter_bench -impl=2 -quick -reserve_table_builder_memory=true | grep 'Build avg'` #-run | (pre-PR) avg ns/key | std ns/key | (post-PR) ns/key | std ns/key | change (%) -- | -- | -- | -- | -- | -- 10 | 26.4369 | 0.442182 | 26.3273 | 0.422919 | **-0.4145720565** 20 | 26.4451 | 0.592787 | 26.1419 | 0.62451 | **-1.1465262** - Crash test `python3 tools/db_crashtest.py blackbox --reserve_table_reader_memory=1 --cache_size=1` killed as normal Reviewed By: ajkr Differential Revision: D35136549 Pulled By: hx235 fbshipit-source-id: 146978858d0f900f43f4eb09bfd3e83195e3be28 |
3 years ago |
|
Chen Lixiang
|
cd59b139fc |
Fix some typos in comments and HISTORY.md (#9798)
Summary: compation --> compaction Pull Request resolved: https://github.com/facebook/rocksdb/pull/9798 Reviewed By: ajkr Differential Revision: D35341611 Pulled By: jay-zhuang fbshipit-source-id: 5ea07527c311de75cade219456b6ee52b23020f6 |
3 years ago |
|
Akanksha Mahajan
|
fd66005628 |
Add 'adaptive_readahead' and 'async_io' options to db_stress (#9750)
Summary: Same as title Pull Request resolved: https://github.com/facebook/rocksdb/pull/9750 Test Plan: export CRASH_TEST_EXT_ARGS=" --async_io=1 --adaptive_readahead=1; make -j crash_test Reviewed By: jay-zhuang Differential Revision: D35114326 Pulled By: akankshamahajan15 fbshipit-source-id: 8b05c95be09f7aff6cb9eb757aa20a6520349d45 |
3 years ago |
|
Yanqin Jin
|
c18c4a081c |
Add new determinators for multiops transactions stress test (#9708)
Summary: Add determinators for multiops transactions stress test with write-committed and write-prepared policies. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9708 Test Plan: Internal CI Reviewed By: jay-zhuang Differential Revision: D34967263 Pulled By: riversand963 fbshipit-source-id: 170a0842d56dccb6ed6bc0c5adfd33849acd6b31 |
3 years ago |
|
Yanqin Jin
|
5894761056 |
Improve stress test for transactions (#9568)
Summary: Test only, no change to functionality. Extremely low risk of library regression. Update test key generation by maintaining existing and non-existing keys. Update db_crashtest.py to drive multiops_txn stress test for both write-committed and write-prepared. Add a make target 'blackbox_crash_test_with_multiops_txn'. Running the following commands caught the bug exposed in https://github.com/facebook/rocksdb/issues/9571. ``` $rm -rf /tmp/rocksdbtest/* $./db_stress -progress_reports=0 -test_multi_ops_txns -use_txn -clear_column_family_one_in=0 \ -column_families=1 -writepercent=0 -delpercent=0 -delrangepercent=0 -customopspercent=60 \ -readpercent=20 -prefixpercent=0 -iterpercent=20 -reopen=0 -ops_per_thread=1000 -ub_a=10000 \ -ub_c=100 -destroy_db_initially=0 -key_spaces_path=/dev/shm/key_spaces_desc -threads=32 -read_fault_one_in=0 $./db_stress -progress_reports=0 -test_multi_ops_txns -use_txn -clear_column_family_one_in=0 -column_families=1 -writepercent=0 -delpercent=0 -delrangepercent=0 -customopspercent=60 -readpercent=20 \ -prefixpercent=0 -iterpercent=20 -reopen=0 -ops_per_thread=1000 -ub_a=10000 -ub_c=100 -destroy_db_initially=0 \ -key_spaces_path=/dev/shm/key_spaces_desc -threads=32 -read_fault_one_in=0 ``` Running the following command caught a bug which will be fixed in https://github.com/facebook/rocksdb/issues/9648 . ``` $TEST_TMPDIR=/dev/shm make blackbox_crash_test_with_multiops_wc_txn ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/9568 Reviewed By: jay-zhuang Differential Revision: D34308154 Pulled By: riversand963 fbshipit-source-id: 99ff1b65c19b46c471d2f2d3b47adcd342a1b9e7 |
3 years ago |
|
Baptiste Lemaire
|
e4c87773e1 |
Reactivate Mempurge feature in crash test. (#9684)
Summary: Set `experimental_mempurge_threshold` back to `lambda: 10.0*random.random()` in crash test, reverting https://github.com/facebook/rocksdb/issues/8958 after fix provided in https://github.com/facebook/rocksdb/issues/9671 . Pull Request resolved: https://github.com/facebook/rocksdb/pull/9684 Reviewed By: pdillinger Differential Revision: D34820257 Pulled By: bjlemaire fbshipit-source-id: 1e5ae8c872c4ac4c4267c990ac5e3e793d77908c |
3 years ago |
|
Andrew Kryczka
|
ad2cab8f0c |
minor tweaks to db_crashtest.py settings (#9483)
Summary: I did another pass through running CI jobs. It is uncommon now to see `db_stress` stuck in the setup phase but still happen. One reason was repeatedly reading/verifying checksum on filter blocks when `-cache_index_and_filter_blocks=1` and `-cache_size=1048576`. To address that I increased the cache size. Another reason was having a WAL with many range tombstones and every `db_stress` run using `-avoid_flush_during_recovery=1` (in that scenario, the setup phase spent too much CPU in `rocksdb::MemTable::NewRangeTombstoneIteratorInternal()`). To address that I fixed the `-avoid_flush_during_recovery` setting so it is reevaluated for every `db_stress` run. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9483 Reviewed By: riversand963 Differential Revision: D33922929 Pulled By: ajkr fbshipit-source-id: 0a298ec7c4df6f6b44620233996047a2dc7ee5f3 |
3 years ago |
|
Yanqin Jin
|
8b62abcc21 |
Disable backup/restore for ts-stress test (#9497)
Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/9497 Reviewed By: ajkr Differential Revision: D33990256 Pulled By: riversand963 fbshipit-source-id: 268ce16b037e23e42b14fa0fcb45535582e1a0d6 |
3 years ago |
|
Hui Xiao
|
920386f2b7 |
Detect (new) Bloom/Ribbon Filter construction corruption (#9342)
Summary: Note: rebase on and merge after https://github.com/facebook/rocksdb/pull/9349, https://github.com/facebook/rocksdb/pull/9345, (optional) https://github.com/facebook/rocksdb/pull/9393 **Context:** (Quoted from pdillinger) Layers of information during new Bloom/Ribbon Filter construction in building block-based tables includes the following: a) set of keys to add to filter b) set of hashes to add to filter (64-bit hash applied to each key) c) set of Bloom indices to set in filter, with duplicates d) set of Bloom indices to set in filter, deduplicated e) final filter and its checksum This PR aims to detect corruption (e.g, unexpected hardware/software corruption on data structures residing in the memory for a long time) from b) to e) and leave a) as future works for application level. - b)'s corruption is detected by verifying the xor checksum of the hash entries calculated as the entries accumulate before being added to the filter. (i.e, `XXPH3FilterBitsBuilder::MaybeVerifyHashEntriesChecksum()`) - c) - e)'s corruption is detected by verifying the hash entries indeed exists in the constructed filter by re-querying these hash entries in the filter (i.e, `FilterBitsBuilder::MaybePostVerify()`) after computing the block checksum (except for PartitionFilter, which is done right after each `FilterBitsBuilder::Finish` for impl simplicity - see code comment for more). For this stage of detection, we assume hash entries are not corrupted after checking on b) since the time interval from b) to c) is relatively short IMO. Option to enable this feature of detection is `BlockBasedTableOptions::detect_filter_construct_corruption` which is false by default. **Summary:** - Implemented new functions `XXPH3FilterBitsBuilder::MaybeVerifyHashEntriesChecksum()` and `FilterBitsBuilder::MaybePostVerify()` - Ensured hash entries, final filter and banding and their [cache reservation ](https://github.com/facebook/rocksdb/issues/9073) are released properly despite corruption - See [Filter.construction.artifacts.release.point.pdf ](https://github.com/facebook/rocksdb/files/7923487/Design.Filter.construction.artifacts.release.point.pdf) for high-level design - Bundled and refactored hash entries's related artifact in XXPH3FilterBitsBuilder into `HashEntriesInfo` for better control on lifetime of these artifact during `SwapEntires`, `ResetEntries` - Ensured RocksDB block-based table builder calls `FilterBitsBuilder::MaybePostVerify()` after constructing the filter by `FilterBitsBuilder::Finish()` - When encountering such filter construction corruption, stop writing the filter content to files and mark such a block-based table building non-ok by storing the corruption status in the builder. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9342 Test Plan: - Added new unit test `DBFilterConstructionCorruptionTestWithParam.DetectCorruption` - Included this new feature in `DBFilterConstructionReserveMemoryTestWithParam.ReserveMemory` as this feature heavily touch ReserveMemory's impl - For fallback case, I run `./filter_bench -impl=3 -detect_filter_construct_corruption=true -reserve_table_builder_memory=true -strict_capacity_limit=true -quick -runs 10 | grep 'Build avg'` to make sure nothing break. - Added to `filter_bench`: increased filter construction time by **30%**, mostly by `MaybePostVerify()` - FastLocalBloom - Before change: `./filter_bench -impl=2 -quick -runs 10 | grep 'Build avg'`: **28.86643s** - After change: - `./filter_bench -impl=2 -detect_filter_construct_corruption=false -quick -runs 10 | grep 'Build avg'` (expect a tiny increase due to MaybePostVerify is always called regardless): **27.6644s (-4% perf improvement might be due to now we don't drop bloom hash entry in `AddAllEntries` along iteration but in bulk later, same with the bypassing-MaybePostVerify case below)** - `./filter_bench -impl=2 -detect_filter_construct_corruption=true -quick -runs 10 | grep 'Build avg'` (expect acceptable increase): **34.41159s (+20%)** - `./filter_bench -impl=2 -detect_filter_construct_corruption=true -quick -runs 10 | grep 'Build avg'` (by-passing MaybePostVerify, expect minor increase): **27.13431s (-6%)** - Standard128Ribbon - Before change: `./filter_bench -impl=3 -quick -runs 10 | grep 'Build avg'`: **122.5384s** - After change: - `./filter_bench -impl=3 -detect_filter_construct_corruption=false -quick -runs 10 | grep 'Build avg'` (expect a tiny increase due to MaybePostVerify is always called regardless - verified by removing MaybePostVerify under this case and found only +-1ns difference): **124.3588s (+2%)** - `./filter_bench -impl=3 -detect_filter_construct_corruption=true -quick -runs 10 | grep 'Build avg'`(expect acceptable increase): **159.4946s (+30%)** - `./filter_bench -impl=3 -detect_filter_construct_corruption=true -quick -runs 10 | grep 'Build avg'`(by-passing MaybePostVerify, expect minor increase) : **125.258s (+2%)** - Added to `db_stress`: `make crash_test`, `./db_stress --detect_filter_construct_corruption=true` - Manually smoke-tested: manually corrupted the filter construction in some db level tests with basic PUT and background flush. As expected, the error did get returned to users in subsequent PUT and Flush status. Reviewed By: pdillinger Differential Revision: D33746928 Pulled By: hx235 fbshipit-source-id: cb056426be5a7debc1cd16f23bc250f36a08ca57 |
3 years ago |
|
Andrew Kryczka
|
8dbd0bd11f |
db_crashtest.py use cheaper settings (#9476)
Summary: Despite attempts to optimize `db_stress` setup phase (i.e., pre-`OperateDb()`) latency in https://github.com/facebook/rocksdb/issues/9470 and https://github.com/facebook/rocksdb/issues/9475, it still always took tens of seconds. Since we still aren't able to setup a 100M key `db_stress` quickly, we should reduce the number of keys. This PR reduces it 4x while increasing `value_size_mult` 4x (from its default value of 8) so that memtables and SST files fill at a similar rate compared to before this PR. Also disabled bzip2 compression since we'll probably never use it and I noticed many CI runs spending majority of CPU on bzip2 decompression. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9476 Reviewed By: siying Differential Revision: D33898520 Pulled By: ajkr fbshipit-source-id: 855021784ad9664f2be5bce21f0339a1cf93230d |
3 years ago |
|
Peter Dillinger
|
c11fe94000 |
Fix^2 prefix extractor testing in crash test (#9463)
Summary: Even after https://github.com/facebook/rocksdb/issues/9461 could see ``` Error: please specify prefix_size for test_batches_snapshots test! ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/9463 Test Plan: run `make blackbox_crashtest` for a long time. (Unfortunately, it's taking a long time to reproduce these failures) Reviewed By: akankshamahajan15 Differential Revision: D33838152 Pulled By: pdillinger fbshipit-source-id: b9a73c5bbb68df53f14c22b9b52f61d1f7ef38af |
3 years ago |
|
Peter Dillinger
|
981e8c621f |
Fix/expand prefix extractor testing in crash test (#9461)
Summary: Changes in https://github.com/facebook/rocksdb/issues/9453 could trigger ``` stderr: Error: prefixpercent is non-zero while prefix_size is not positive! ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/9461 Test Plan: run `make blackbox_crashtest` for a long time Reviewed By: ajkr Differential Revision: D33830751 Pulled By: pdillinger fbshipit-source-id: be88377dcaa47e4bb7adb0347762639eff8f1476 |
3 years ago |
|
Peter Dillinger
|
ea89c77f27 |
Fix major bug with MultiGet, DeleteRange, and memtable Bloom (#9453)
Summary: MemTable::MultiGet was not considering range tombstones before querying Bloom filter. This means range tombstones would be skipped for keys (or prefixes) with no other entries in the memtable. This could cause old values for a key (in SST files) to still show up until the range tombstone covering it has been flushed. This is fixed by essentially disabling the memtable Bloom filter when there are any range tombstones. (This could be better optimized in the future, but good enough for now.) Did some other cleanup/optimization in the same code to (more than) offset the cost of checking on range tombstones in more cases. There is now notable improvement when memtable_whole_key_filtering and prefix_extractor are used together (unusual), and this makes MultiGet closer to the Get implementation. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9453 Test Plan: new unit test added. Added memtable Bloom to crash test. Performance testing -------------------- Build WAL-only DB (recovers to memtable): ``` TEST_TMPDIR=/dev/shm/rocksdb ./db_bench -benchmarks=fillrandom -num=1000000 -write_buffer_size=250000000 ``` Query test command, to maximize sensitivity to the changed code: ``` TEST_TMPDIR=/dev/shm/rocksdb ./db_bench -use_existing_db -readonly -benchmarks=multireadrandom -num=10000000 -write_buffer_size=250000000 -memtable_bloom_size_ratio=0.015 -multiread_batched -batch_size=24 -threads=8 -memtable_whole_key_filtering=$MWKF -prefix_size=$PXS ``` (Note -num here is 10x larger for mostly memtable misses) Before & after run simultaneously, average over 10 iterations per data point, ops/sec. MWKF=0 PXS=0 (Bloom disabled) Before: 5724844 After: 6722066 MWKF=0 PXS=7 (prefixes hardly unique; Bloom not useful) Before: 9981319 After: 10237990 MWKF=0 PXS=8 (prefixes unique; Bloom useful) Before: 12081715 After: 12117603 MWKF=1 PXS=0 (whole key Bloom useful) Before: 11944354 After: 12096085 MWKF=1 PXS=7 (whole key Bloom useful in new version; prefixes not useful in old version) Before: 9444299 After: 11826029 MWKF=1 PXS=7 (whole key Bloom useful in new version; prefixes useful in old version) Before: 11784465 After: 11778591 Only in this last case is the 'before' *slightly* faster, perhaps because hashing prefixes is slightly faster than hashing whole keys. Otherwise, 'after' is faster. Reviewed By: ajkr Differential Revision: D33805025 Pulled By: pdillinger fbshipit-source-id: 597523cae4f4eafdf6ae6bb2bc6cb46f83b017bf |
3 years ago |
|
Andrew Kryczka
|
6892f19b11 |
Test correctness with WAL disabled in non-txn blackbox crash tests (#9338)
Summary: Recently we added the ability to verify some prefix of operations are recovered (AKA no "hole" in the recovered data) (https://github.com/facebook/rocksdb/issues/8966). Besides testing unsynced data loss scenarios, it is also useful to test WAL disabled use cases, where unflushed writes are expected to be lost. Note RocksDB only offers the prefix-recovery guarantee to WAL-disabled use cases that use atomic flush, so crash test always enables atomic flush when WAL is disabled. To verify WAL-disabled crash-recovery correctness globally, i.e., also in whitebox and blackbox transaction tests, it is possible but requires further changes. I added TODOs in db_crashtest.py. Depends on https://github.com/facebook/rocksdb/issues/9305. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9338 Test Plan: Running all crash tests and many instances of blackbox. Sandcastle links are in Phabricator diff test plan. Reviewed By: riversand963 Differential Revision: D33345333 Pulled By: ajkr fbshipit-source-id: f56dd7d2e5a78d59301bf4fc3fedb980eb31e0ce |
3 years ago |
|
Andrew Kryczka
|
5383f1eec4 |
Verify recovery correctness in multi-CF blackbox crash test (#9303)
Summary: db_crashtest.py uses multiple CFs only when run without flag `--simple`. The previous config set `-test_batches_snapshots=1` in that case for blackbox mode. But `-test_batches_snapshots=1` cannot verify recovery correctness, so it should not always be set for multi-CF blackbox tests. We can instead randomly toggle it. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9303 Reviewed By: riversand963 Differential Revision: D33155229 Pulled By: ajkr fbshipit-source-id: 4a6fdc4eddccc8ece664063baf6393ce1c5de6b7 |
3 years ago |
|
Akanksha Mahajan
|
9e4d56f2c9 |
Fix segmentation fault in table_options.prepopulate_block_cache when used with partition_filters (#9263)
Summary: When table_options.prepopulate_block_cache is set to BlockBasedTableOptions::PrepopulateBlockCache::kFlushOnly and table_options.partition_filters is also set true, then there is segmentation failure when top level filter is fetched because its entered with wrong type in cache. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9263 Test Plan: Updated unit tests; Ran db_stress: make crash_test -j32 Reviewed By: pdillinger Differential Revision: D32936566 Pulled By: akankshamahajan15 fbshipit-source-id: 8bd79e53830d3e3c1bb79787e1ffbc3cb46d4426 |
3 years ago |
|
Levi Tamasi
|
dc5de45af8 |
Support readahead during compaction for blob files (#9187)
Summary: The patch adds a new BlobDB configuration option `blob_compaction_readahead_size` that can be used to enable prefetching data from blob files during compaction. This is important when using storage with higher latencies like HDDs or remote filesystems. If enabled, prefetching is used for all cases when blobs are read during compaction, namely garbage collection, compaction filters (when the existing value has to be read from a blob file), and `Merge` (when the value of the base `Put` is stored in a blob file). Pull Request resolved: https://github.com/facebook/rocksdb/pull/9187 Test Plan: Ran `make check` and the stress/crash test. Reviewed By: riversand963 Differential Revision: D32565512 Pulled By: ltamasi fbshipit-source-id: 87be9cebc3aa01cc227bec6b5f64d827b8164f5d |
3 years ago |
|
anand76
|
78556c14dd |
Secondary cache error injection (#9002)
Summary: Implement secondary cache error injection in db_stress. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9002 Reviewed By: zhichao-cao Differential Revision: D31874896 Pulled By: anand1976 fbshipit-source-id: 8cf04c061a4a44efa0fe88423d05cade67b85f73 |
3 years ago |
|
Peter Dillinger
|
a7d4bea43a |
Implement XXH3 block checksum type (#9069)
Summary: XXH3 - latest hash function that is extremely fast on large data, easily faster than crc32c on most any x86_64 hardware. In integrating this hash function, I have handled the compression type byte in a non-standard way to avoid using the streaming API (extra data movement and active code size because of hash function complexity). This approach got a thumbs-up from Yann Collet. Existing functionality change: * reject bad ChecksumType in options with InvalidArgument This change split off from https://github.com/facebook/rocksdb/issues/9058 because context-aware checksum is likely to be handled through different configuration than ChecksumType. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9069 Test Plan: tests updated, and substantially expanded. Unit tests now check that we don't accidentally change the values generated by the checksum algorithms ("schema test") and that we properly handle invalid/unrecognized checksum types in options or in file footer. DBTestBase::ChangeOptions (etc.) updated from two to one configuration changing from default CRC32c ChecksumType. The point of this test code is to detect possible interactions among features, and the likelihood of some bad interaction being detected by including configurations other than XXH3 and CRC32c--and then not detected by stress/crash test--is extremely low. Stress/crash test also updated (manual run long enough to see it accepts new checksum type). db_bench also updated for microbenchmarking checksums. ### Performance microbenchmark (PORTABLE=0 DEBUG_LEVEL=0, Broadwell processor) ./db_bench -benchmarks=crc32c,xxhash,xxhash64,xxh3,crc32c,xxhash,xxhash64,xxh3,crc32c,xxhash,xxhash64,xxh3 crc32c : 0.200 micros/op 5005220 ops/sec; 19551.6 MB/s (4096 per op) xxhash : 0.807 micros/op 1238408 ops/sec; 4837.5 MB/s (4096 per op) xxhash64 : 0.421 micros/op 2376514 ops/sec; 9283.3 MB/s (4096 per op) xxh3 : 0.171 micros/op 5858391 ops/sec; 22884.3 MB/s (4096 per op) crc32c : 0.206 micros/op 4859566 ops/sec; 18982.7 MB/s (4096 per op) xxhash : 0.793 micros/op 1260850 ops/sec; 4925.2 MB/s (4096 per op) xxhash64 : 0.410 micros/op 2439182 ops/sec; 9528.1 MB/s (4096 per op) xxh3 : 0.161 micros/op 6202872 ops/sec; 24230.0 MB/s (4096 per op) crc32c : 0.203 micros/op 4924686 ops/sec; 19237.1 MB/s (4096 per op) xxhash : 0.839 micros/op 1192388 ops/sec; 4657.8 MB/s (4096 per op) xxhash64 : 0.424 micros/op 2357391 ops/sec; 9208.6 MB/s (4096 per op) xxh3 : 0.162 micros/op 6182678 ops/sec; 24151.1 MB/s (4096 per op) As you can see, especially once warmed up, xxh3 is fastest. ### Performance macrobenchmark (PORTABLE=0 DEBUG_LEVEL=0, Broadwell processor) Test for I in `seq 1 50`; do for CHK in 0 1 2 3 4; do TEST_TMPDIR=/dev/shm/rocksdb$CHK ./db_bench -benchmarks=fillseq -memtablerep=vector -allow_concurrent_memtable_write=false -num=30000000 -checksum_type=$CHK 2>&1 | grep 'micros/op' | tee -a results-$CHK & done; wait; done Results (ops/sec) for FILE in results*; do echo -n "$FILE "; awk '{ s += $5; c++; } END { print 1.0 * s / c; }' < $FILE; done results-0 252118 # kNoChecksum results-1 251588 # kCRC32c results-2 251863 # kxxHash results-3 252016 # kxxHash64 results-4 252038 # kXXH3 Reviewed By: mrambacher Differential Revision: D31905249 Pulled By: pdillinger fbshipit-source-id: cb9b998ebe2523fc7c400eedf62124a78bf4b4d1 |
3 years ago |
|
Levi Tamasi
|
3e1bf771a3 |
Make it possible to force the garbage collection of the oldest blob files (#8994)
Summary: The current BlobDB garbage collection logic works by relocating the valid blobs from the oldest blob files as they are encountered during compaction, and cleaning up blob files once they contain nothing but garbage. However, with sufficiently skewed workloads, it is theoretically possible to end up in a situation when few or no compactions get scheduled for the SST files that contain references to the oldest blob files, which can lead to increased space amp due to the lack of GC. In order to efficiently handle such workloads, the patch adds a new BlobDB configuration option called `blob_garbage_collection_force_threshold`, which signals to BlobDB to schedule targeted compactions for the SST files that keep alive the oldest batch of blob files if the overall ratio of garbage in the given blob files meets the threshold *and* all the given blob files are eligible for GC based on `blob_garbage_collection_age_cutoff`. (For example, if the new option is set to 0.9, targeted compactions will get scheduled if the sum of garbage bytes meets or exceeds 90% of the sum of total bytes in the oldest blob files, assuming all affected blob files are below the age-based cutoff.) The net result of these targeted compactions is that the valid blobs in the oldest blob files are relocated and the oldest blob files themselves cleaned up (since *all* SST files that rely on them get compacted away). These targeted compactions are similar to periodic compactions in the sense that they force certain SST files that otherwise would not get picked up to undergo compaction and also in the sense that instead of merging files from multiple levels, they target a single file. (Note: such compactions might still include neighboring files from the same level due to the need of having a "clean cut" boundary but they never include any files from any other level.) This functionality is currently only supported with the leveled compaction style and is inactive by default (since the default value is set to 1.0, i.e. 100%). Pull Request resolved: https://github.com/facebook/rocksdb/pull/8994 Test Plan: Ran `make check` and tested using `db_bench` and the stress/crash tests. Reviewed By: riversand963 Differential Revision: D31489850 Pulled By: ltamasi fbshipit-source-id: 44057d511726a0e2a03c5d9313d7511b3f0c4eab |
3 years ago |
|
Andrew Kryczka
|
a282eff3d1 |
Protect existing files in `FaultInjectionTest{Env,FS}::ReopenWritableFile()` (#8995)
Summary:
`FaultInjectionTest{Env,FS}::ReopenWritableFile()` functions were accidentally deleting WALs from previous `db_stress` runs causing verification to fail. They were operating under the assumption that `ReopenWritableFile()` would delete any existing file. It was a reasonable assumption considering the `{Env,FileSystem}::ReopenWritableFile()` documentation stated that would happen. The only problem was neither the implementations we offer nor the "real" clients in RocksDB code followed that contract. So, this PR updates the contract as well as fixing the fault injection client usage.
The fault injection change exposed that `ExternalSSTFileBasicTest.SyncFailure` was relying on a fault injection `Env` dropping unsynced data written by a regular `Env`. I changed that test to make its `SstFileWriter` use fault injection `Env`, and also implemented `LinkFile()` in fault injection so the unsynced data is tracked under the new name.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8995
Test Plan:
- Verified it fixes the following failure:
```
$ ./db_stress --clear_column_family_one_in=0 --column_families=1 --db=/dev/shm/rocksdb_crashtest_whitebox --delpercent=5 --expected_values_dir=/dev/shm/rocksdb_crashtest_expected --iterpercent=0 --key_len_percent_dist=1,30,69 --max_key=100000 --max_key_len=3 --nooverwritepercent=1 --ops_per_thread=1000 --prefixpercent=0 --readpercent=60 --reopen=0 --target_file_size_base=1048576 --test_batches_snapshots=0 --write_buffer_size=1048576 --writepercent=35 --value_size_mult=33 -threads=1
...
$ ./db_stress --avoid_flush_during_recovery=1 --clear_column_family_one_in=0 --column_families=1 --db=/dev/shm/rocksdb_crashtest_whitebox --delpercent=5 --destroy_db_initially=0 --expected_values_dir=/dev/shm/rocksdb_crashtest_expected --iterpercent=10 --key_len_percent_dist=1,30,69 --max_bytes_for_level_base=4194304 --max_key=100000 --max_key_len=3 --nooverwritepercent=1 --open_files=-1 --open_metadata_write_fault_one_in=8 --open_write_fault_one_in=16 --ops_per_thread=1000 --prefix_size=-1 --prefixpercent=0 --readpercent=50 --sync=1 --target_file_size_base=1048576 --test_batches_snapshots=0 --write_buffer_size=1048576 --writepercent=35 --value_size_mult=33 -threads=1
...
Verification failed for column family 0 key 000000000000001300000000000000857878787878 (1143): Value not found: NotFound:
Crash-recovery verification failed :(
...
```
- `make check -j48`
Reviewed By: ltamasi
Differential Revision: D31495388
Pulled By: ajkr
fbshipit-source-id: 7886ccb6a07cb8b78ad7b6c1c341ccf40bb68385
|
3 years ago |
|
Akanksha Mahajan
|
84d71f30c4 |
Enable SingleDelete with user defined ts in db_bench and crash tests (#8971)
Summary: Enable SingleDelete with user defined timestamp in db_bench, db_stress and crash test Pull Request resolved: https://github.com/facebook/rocksdb/pull/8971 Test Plan: 1. For db_stress, ran the command for full duration: i) python3 -u tools/db_crashtest.py --enable_ts whitebox --nooverwritepercent=100 ii) make crash_test_with_ts 2. For db_bench, ran: ./db_bench -benchmarks=randomreplacekeys -user_timestamp_size=8 -use_single_deletes=true Reviewed By: riversand963 Differential Revision: D31246558 Pulled By: akankshamahajan15 fbshipit-source-id: 29cd8740c9921341e52f09242fca3c44d75a12b7 |
3 years ago |
|
Andrew Kryczka
|
559943cdc0 |
Refactor expected state in stress/crash test (#8913)
Summary: This is a precursor refactoring to enable an upcoming feature: persistence failure correctness testing. - Changed `--expected_values_path` to `--expected_values_dir` and migrated "db_crashtest.py" to use the new flag. For persistence failure correctness testing there are multiple possible correct states since unsynced data is allowed to be dropped. Making it possible to restore all these possible correct states will eventually involve files containing snapshots of expected values and DB trace files. - The expected values directory is managed by an `ExpectedStateManager` instance. Managing expected state files is separated out of `SharedState` to prevent `SharedState` from becoming too complex when the new files and features (snapshotting, tracing, and restoring) are introduced. - Migrated expected values file access/management out of `SharedState` into a separate class called `ExpectedState`. This is not exposed directly to the test but rather the `ExpectedState` for the latest values file is accessed via a pass-through API on `ExpectedStateManager`. This forces the test to always access the single latest `ExpectedState`. - Changed the initialization of the latest expected values file to use a tempfile followed by rename, and also add cleanup logic for possible stranded tempfiles. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8913 Test Plan: run in several ways; try to make sure it's not obviously broken. - crashtest blackbox without TEST_TMPDIR ``` $ python3 tools/db_crashtest.py blackbox --simple --write_buffer_size=1048576 --target_file_size_base=1048576 --max_bytes_for_level_base=4194304 --max_key=100000 --value_size_mult=33 --compression_type=none --duration=120 --interval=10 --compression_type=none --blob_compression_type=none ``` - crashtest blackbox with TEST_TMPDIR ``` $ TEST_TMPDIR=/dev/shm python3 tools/db_crashtest.py blackbox --simple --write_buffer_size=1048576 --target_file_size_base=1048576 --max_bytes_for_level_base=4194304 --max_key=100000 --value_size_mult=33 --compression_type=none --duration=120 --interval=10 --compression_type=none --blob_compression_type=none ``` - crashtest whitebox with TEST_TMPDIR ``` $ TEST_TMPDIR=/dev/shm python3 tools/db_crashtest.py whitebox --simple --write_buffer_size=1048576 --target_file_size_base=1048576 --max_bytes_for_level_base=4194304 --max_key=100000 --value_size_mult=33 --compression_type=none --duration=120 --interval=10 --compression_type=none --blob_compression_type=none --random_kill_odd=88887 ``` - db_stress without expected_values_dir ``` $ ./db_stress --write_buffer_size=1048576 --target_file_size_base=1048576 --max_bytes_for_level_base=4194304 --max_key=100000 --value_size_mult=33 --compression_type=none --ops_per_thread=10000 --clear_column_family_one_in=0 --destroy_db_initially=true ``` - db_stress with expected_values_dir and manual corruption ``` $ ./db_stress --write_buffer_size=1048576 --target_file_size_base=1048576 --max_bytes_for_level_base=4194304 --max_key=100000 --value_size_mult=33 --compression_type=none --ops_per_thread=10000 --clear_column_family_one_in=0 --destroy_db_initially=true --expected_values_dir=./ // modify one byte in "./LATEST.state" $ ./db_stress --write_buffer_size=1048576 --target_file_size_base=1048576 --max_bytes_for_level_base=4194304 --max_key=100000 --value_size_mult=33 --compression_type=none --ops_per_thread=10000 --clear_column_family_one_in=0 --destroy_db_initially=false --expected_values_dir=./ ... Verification failed for column family 0 key 0000000000000000 (0): Value not found: NotFound: ... ``` Reviewed By: riversand963 Differential Revision: D30921951 Pulled By: ajkr fbshipit-source-id: babfe218062e55d018c9b046536c0289fb78f41c |
3 years ago |
|
Andrew Kryczka
|
6d424be910 |
Temporarily set experimental_mempurge_threshold=0 in crash test (#8958)
Summary: For now, disable it since the below command indicates it can cause a failure. Running that command with `-experimental_mempurge_threshold=0` has been running successfully for several minutes, whereas before it failed in seconds. ``` $ while rm -rf /dev/shm/single_stress && ./db_stress --clear_column_family_one_in=0 --column_families=1 --db=/dev/shm/single_stress --experimental_mempurge_threshold=5.493146827397074 --flush_one_in=10000 --reopen=0 --write_buffer_size=262144 --value_size_mult=33 --max_write_buffer_number=3 -ops_per_thread=10000; do : ; done ``` Pull Request resolved: https://github.com/facebook/rocksdb/pull/8958 Reviewed By: ltamasi Differential Revision: D31187059 Pulled By: ajkr fbshipit-source-id: 04d5bfb4fcc4f5b66233e691427dfd940c67037f |
3 years ago |
|
sdong
|
9320067703 |
Improve fault injection to MultiRead (#8937)
Summary: Several improvements to MultiRead: 1. Fix a bug in stress test which causes false positive when both MultiRead() return and individual read request have failure injected. 2. Add two more types of fault that should be handled: empty read results and checksum mismatch 3. Add a message indicating which type of fault is injected 4. Increase the failure rate Pull Request resolved: https://github.com/facebook/rocksdb/pull/8937 Reviewed By: anand1976 Differential Revision: D31085930 fbshipit-source-id: 3a04994a3cadebf9a64d25e1fe12b14b7a272fba |
3 years ago |
|
Yanqin Jin
|
d8eb824325 |
Temporarily disable block-based filter when stress testing timestamp (#8703)
Summary: Current implementation does not support user-defined timestamp when block-based filter is used. Will implement the support in the future, or wait to see if block-based filter can be deprecated and removed. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8703 Test Plan: make whitebox_crash_test_with_ts Reviewed By: pdillinger Differential Revision: D30528931 Pulled By: riversand963 fbshipit-source-id: 60dd74ee0a6194e69072069d8c4bd876f249f38d |
3 years ago |
|
Peter Dillinger
|
2a383f21f4 |
Add Bloom/Ribbon hybrid API support (#8679)
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 |
3 years ago |
|
Baptiste Lemaire
|
e3a96c4823 |
Memtable sampling for mempurge heuristic. (#8628)
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 |
3 years ago |
|
Peter (Stig) Edwards
|
543a201b93 |
Remove unused variable - run_had_errors (#8599)
Summary: Unused since |
3 years ago |
|
Baptiste Lemaire
|
d6006f9c9b |
Add experimental mempurge policy flag to db_stress. (#8588)
Summary: Add `experimental_mempurge_policy` flag to `db_stress` and `db_crashtest.py`. This flag is only read if the `experimental_allow_mempurge` flag is set to `true`. This flag can take the following values: `kAlways`, and `kAlternate` (default). - `kAlways`: a flush is always redirected to a mempurge. If the mempurge aborts, the a regular flush proceeds. - `kAlternate`: if one or more of the flush input memtables is an mempurge output memtable, then a flush is performed, else a mempurge is carried out. Similar to kAlways, if a mempurge aborts, the FlushJob proceeds to a regular flush to storage. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8588 Reviewed By: pdillinger Differential Revision: D29934251 Pulled By: bjlemaire fbshipit-source-id: 90c1debed2029b9915d066914556547507c33dae |
3 years ago |
|
Baptiste Lemaire
|
0229a88dfe |
Crashtest mempurge (#8545)
Summary: Add `experiemental_allow_mempurge` flag support for `db_stress` and `db_crashtest.py`, with a `false` default value. I succesfully tested locally both `whitebox` and `blackbox` crash tests with `experiemental_allow_mempurge` flag set as true. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8545 Reviewed By: akankshamahajan15 Differential Revision: D29734513 Pulled By: bjlemaire fbshipit-source-id: 24316c0eccf6caf409e95c035f31d822c66714ae |
3 years ago |