Summary:
`Delayed` is set true in two cases. One is when `delay` is specified. Other one is in the `while` loop - cd21e4e69d/db/db_impl/db_impl_write.cc (L1876)
However start_time is not initialized in second case, resulting in time_delayed = immutable_db_options_.clock->NowMicros() - 0(start_time);
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12147
Test Plan: Existing CircleCI
Reviewed By: cbi42
Differential Revision: D52173481
Pulled By: akankshamahajan15
fbshipit-source-id: fb9183b24c191d287a1d715346467bee66190f98
Summary:
RocksDB self throttles per-DB compaction parallelism until it detects compaction pressure. The pressure detection based on pending compaction bytes was only comparing against the slowdown trigger (`soft_pending_compaction_bytes_limit`). Online services tend to set that extremely high to avoid stalling at all costs. Perhaps they should have set it to zero, but we never documented that zero disables stalling so I have been telling everyone to increase it for years.
This PR adds pressure detection based on pending compaction bytes relative to the size of bottommost data. The size of bottommost data should be fairly stable and proportional to the logical data size
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12130
Reviewed By: hx235
Differential Revision: D52000746
Pulled By: ajkr
fbshipit-source-id: 7e1fd170901a74c2d4a69266285e3edf6e7631c7
Summary:
As part of building another feature, I wanted this:
* Custom implementations of `TablePropertiesCollectorFactory` may now return a `nullptr` collector to decline processing a file, reducing callback overheads in such cases.
* Polished, clarified some related API comments.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12129
Test Plan: unit test added
Reviewed By: ltamasi
Differential Revision: D51966667
Pulled By: pdillinger
fbshipit-source-id: 2991c08fe6ce3a8c9f14c68f1495f5a17bca2770
Summary:
Fixes https://github.com/facebook/rocksdb/issues/12061.
We were double counting the `BYTES_WRITTEN` ticker when doing writes with transactions. During transactions, after writing, a client can call `Prepare()`, which writes the values to WAL but not to the Memtable. After that, they can call `Commit()`, which writes a commit marker to the WAL and the values to Memtable.
The cause of this bug is previously during writes, we didn't take into account `writer->ShouldWriteToMemtable()` before adding to `total_byte_size`, so it is still added to during the `Prepare()` phase even though we're not writing to the Memtable, which was why we saw the value to be double of what's written to WAL.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12111
Test Plan: Added a test in `db/db_statistics_test.cc` that tests writes with and without transactions, by comparing the values of `BYTES_WRITTEN` and `WAL_FILE_BYTES` after doing writes.
Reviewed By: jaykorean
Differential Revision: D51954327
Pulled By: jowlyzhang
fbshipit-source-id: 57a0986a14e5b94eb5188715d819212529110d2c
Summary:
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12128
The patch turns the `Timer` Meyers singleton in `PeriodicTaskScheduler::Default()` into one of the leaky variety in order to prevent static destruction order issues.
Reviewed By: akankshamahajan15
Differential Revision: D51963950
fbshipit-source-id: 0fc34113ad03c51fdc83bdb8c2cfb6c9f6913948
Summary:
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12121
The patch eliminates some code duplication by unifying the two sets of `MergeHelper::TimedFullMerge` overloads using variadic templates. It also brings the order of parameters into sync when it comes to the various `TimedFullMerge*` methods.
Reviewed By: jaykorean
Differential Revision: D51862483
fbshipit-source-id: e3f832a6ff89ba34591451655cf11025d0a0d018
Summary:
The optimization to not find and delete obsolete files when FlushRequest is re-scheduled also inadvertently skipped flushing the `LogBuffer`, resulting in missed logs. This PR fixes the issue.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12105
Test Plan:
manually check this test has the correct info log after the fix
`./column_family_test --gtest_filter=ColumnFamilyRetainUDTTest.NotAllKeysExpiredFlushRescheduled`
Reviewed By: ajkr
Differential Revision: D51671079
Pulled By: jowlyzhang
fbshipit-source-id: da0640e07e35c69c08988772ed611ec9e67f2e92
Summary:
Fixes https://github.com/facebook/rocksdb/issues/7930.
When there is a timestamp associated with stored records, get from row cache will return the timestamp provided in query instead of the timestamp associated with the stored record.
## Cause of error:
Currently a row_handle is fetched using row_cache_key(contains a timestamp provided by user query) and the row_handle itself does not persist timestamp associated with the object. Hence the [GetContext::SaveValue()
](6e3429b8a6/table/get_context.cc (L257)) function will fetch the timestamp in row_cache_key and may return the incorrect timestamp value.
## Proposed Solution
If current cf enables ts, append a timestamp associated with stored records after the value in replay_log (equivalently the value of row cache entry).
When read, `replayGetContextLog()` will update parsed_key with the correct timestamp.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11952
Reviewed By: ajkr
Differential Revision: D51501176
Pulled By: jowlyzhang
fbshipit-source-id: 808fc943a8ae95de56ae0e82ec59a2573a031f28
Summary:
`WithinPenultimateLevelOutputRange()` is updated in https://github.com/facebook/rocksdb/issues/12063 to check internal key range. However, op_type of a key can change during compaction, e.g. MERGE -> PUT, which makes a key larger and becomes out of penultimate output range. This has caused stress test failures with error message "Unsafe to store Seq later than snapshot in the last level if per_key_placement is enabled". So update `WithinPenultimateLevelOutputRange()` to only check user key and sequence number.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12081
Test Plan:
* This repro can produce the corruption within a few runs. Ran it a few times after the fix and did not see Corruption failure.
```
python3 ./tools/db_crashtest.py whitebox --test_tiered_storage --random_kill_odd=888887 --use_merge=1 --writepercent=100 --readpercent=0 --prefixpercent=0 --delpercent=0 --delrangepercent=0 --iterpercent=0 --write_buffer_size=419430 --column_families=1 --read_fault_one_in=0 --write_fault_one_in=0
```
Reviewed By: ajkr
Differential Revision: D51481202
Pulled By: cbi42
fbshipit-source-id: cad6b65099733e03071b496e752bbdb09cf4db82
Summary:
The test failure in https://github.com/facebook/rocksdb/issues/11909 shows that we may compact keys outside of internal key range of penultimate level input files from last level to penultimate level, which can potentially cause overlapping files in the penultimate level. This PR updates the `Compaction::WithinPenultimateLevelOutputRange()` to check internal key range instead of user key.
Other fixes:
* skip range del sentinels when deciding output level for tiered compaction
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12063
Test Plan:
- existing unit tests
- apply the fix to https://github.com/facebook/rocksdb/issues/11905 and run `./tiered_compaction_test --gtest_filter="*RangeDelsCauseFileEndpointsToOverlap*"`
Reviewed By: ajkr
Differential Revision: D51288985
Pulled By: cbi42
fbshipit-source-id: 70085db5f5c3b15300bcbc39057d57b83fd9902a
Summary:
I want to use the `WriteBufferManager` in my rust project, which requires exposing it through the c api, just like `Cache` is.
Hopefully the changes are fairly straightfoward!
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11710
Reviewed By: cbi42
Differential Revision: D51166518
Pulled By: ajkr
fbshipit-source-id: cd266ff1e4a7ab145d05385cd125a8390f51f3fc
Summary:
Fixes https://github.com/facebook/rocksdb/issues/11000.
That issue pointed out that RocksDB was slow to delete archived WALs in case time-based and size-based expiration were enabled, and the time-based threshold (`WAL_ttl_seconds`) was small. This PR prevents the delay by taking into account `WAL_ttl_seconds` when deciding the frequency to process archived WALs for deletion.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12069
Reviewed By: pdillinger
Differential Revision: D51262589
Pulled By: ajkr
fbshipit-source-id: e65431a06ee96f4c599ba84a27d1aedebecbb003
Summary:
Fixes https://github.com/facebook/rocksdb/issues/11909. The test passes after the change in https://github.com/facebook/rocksdb/issues/11917 to start mock clock from a non-zero time.
The reason for test failing is a bit complicated:
- The Put here e4ad4a0ef1/db/compaction/tiered_compaction_test.cc (L2045) happens before mock clock advances beyond 0.
- This causes oldest_key_time_ to be 0 for memtable.
- oldest_ancester_time of the first L0 file becomes 0
- L0 -> L5/6 compaction output files sets `oldest_ancestoer_time` to the current time due to these lines: 509947ce2c/db/compaction/compaction_job.cc (L1898C34-L1904).
- This causes some small sequence number to be mapped to current time: 509947ce2c/db/compaction/compaction_job.cc (L301)
- Keys in L6 is being moved up to L5 due to the unexpected seqno_to_time mapping
- When compacting keys from last level to the penultimate level, we only check keys to be within user key range of penultimate level input files. If we compact the following file 3 with file 1 and output keys to L5, we can get the reported inconsistency bug.
```
L5: file 1 [K5@20, K10@kMaxSeqno], file 2 [K10@30, K14@34)
L6: file 3 [K6@5, K10@20]
```
https://github.com/facebook/rocksdb/issues/12063 will add fixes to check internal key range when compacting keys from last level up to the penultimate level.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12064
Test Plan: the unit test passes
Reviewed By: ajkr
Differential Revision: D51281149
Pulled By: cbi42
fbshipit-source-id: 00b7f026c453454d9f3af5b2de441383a96f0c62
Summary:
- Add missing null check for ColumnFamilyHandle in `GetEntity()`
- `FailIfCfHasTs()` now returns `Status::InvalidArgument()` if `column_family` is null. `MultiGetEntity()` can rely on this for cfh null check.
- Added `DeleteRange` API using Default Column Family to be consistent with other major APIs (This was also causing Java Test failure after the `FailIfCfHasTs()` change)
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12057
Test Plan:
- Updated `DBWideBasicTest::GetEntityAsPinnableAttributeGroups` to include null CF case
- Updated `DBWideBasicTest::MultiCFMultiGetEntityAsPinnableAttributeGroups` to include null CF case
Reviewed By: jowlyzhang
Differential Revision: D51167445
Pulled By: jaykorean
fbshipit-source-id: 1c1e44fd7b7df4d2dc3bb2d7d251da85bad7d664
Summary:
When delay didn't happen, histogram WRITE_STALL is still recorded, and ticker STALL_MICROS is not recorded.
This is a bug, neither WRITE_STALL or STALL_MICROS should not be recorded when delay did not happen.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12067
Reviewed By: cbi42
Differential Revision: D51263133
Pulled By: ajkr
fbshipit-source-id: bd82d8328fe088d613991966e83854afdabc6a25
Summary:
Part of the procedures to handle manifest IO error is to disable file deletion in case some files in limbo state get deleted prematurely. This is not ideal because: 1) not all the VersionEdits whose commit encounter such an error contain updates for files, disabling file deletion sometimes are not necessary. 2) `EnableFileDeletion` has a force mode that could make other threads accidentally disrupt this procedure in recovery. 3) Disabling file deletion as a whole is also not as efficient as more precisely tracking impacted files from being prematurely deleted. This PR replaces this mechanism with tracking such files and quarantine them from being deleted in `ErrorHandler`.
These are the types of files being actively tracked in quarantine in this PR:
1) new table files and blob files from a background job
2) old manifest file whose immediately following new manifest file's CURRENT file creation gets into unclear state. Current handling is not sufficient to make sure the old manifest file is kept in case it's needed.
Note that WAL logs are not part of the quarantine because `min_log_number_to_keep` is a safe mechanism and it's only updated after successful manifest commits so it can prevent this premature deletion issue from happening.
We track these files' file numbers because they share the same file number space.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12030
Test Plan: Modified existing unit tests
Reviewed By: ajkr
Differential Revision: D51036774
Pulled By: jowlyzhang
fbshipit-source-id: 84ef26271fbbc888ef70da5c40fe843bd7038716
Summary:
Disabling file deletion can be critical for operations like making a backup, recovery from manifest IO error (for now). Ideally as long as there is one caller requesting file deletion disabled, it should be kept disabled until all callers agree to re-enable it. So this PR removes the default forcing behavior for the `EnableFileDeletion` API, and users need to explicitly pass the argument if they insisted on doing so knowing the consequence of what can be potentially disrupted.
This PR removes the API's default argument value so it will cause breakage for all users that are relying on the default value, regardless of whether the forcing behavior is critical for them. When fixing this breakage, it's good to check if the forcing behavior is indeed needed and potential disruption is OK.
This PR also makes unit test that do not need force behavior to do a regular enable file deletion.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12001
Reviewed By: ajkr
Differential Revision: D51214683
Pulled By: jowlyzhang
fbshipit-source-id: ca7b1ebf15c09eed00f954da2f75c00d2c6a97e4
Summary:
This PR adds a missing set function for rocksdb_options in the C-API:
rocksdb_options_set_cf_paths(). Without this function, users cannot
specify different paths for different column families as it will fall back
to db_paths.
As a bonus, this PR also includes rocksdb_sst_file_metadata_get_directory()
to the C api -- a missing public function that will also make the test easier to write.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11151
Test Plan: Augment existing c_test to verify the specified cf_path.
Reviewed By: hx235
Differential Revision: D51201888
Pulled By: ajkr
fbshipit-source-id: 62a96451f26fab60ada2005ede3eea8e9b431f30
Summary:
#### Problem
While the RocksDB C API does have the RateLimiter API, it does not
expose the auto_tuned option.
#### Summary of Change
This PR exposes auto_tuned RateLimiter option in RocksDB C API.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12058
Test Plan: Augment the C API existing test to cover the new API.
Reviewed By: cbi42
Differential Revision: D51201933
Pulled By: ajkr
fbshipit-source-id: 5bc595a9cf9f88f50fee797b729ba96f09ed8266
Summary:
As titled. This PR contains the API and stubbed implementation for piping write time.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12043
Reviewed By: pdillinger
Differential Revision: D51076575
Pulled By: jowlyzhang
fbshipit-source-id: 3b341263498351b9ccaff27cf35d5aeb5bdf0cf1
Summary:
- Our database is corrupted, causing some sequences of wal record to be invalid (but the `record_checksum` looks fine).
- When we RecoverLogFiles in WALRecoveryMode::kPointInTimeRecovery, `assert(seq <= kMaxSequenceNumber)` will be failed.
- When it is found that sequence is illegal, can we drop the file to recover as much data as possible ? Thx !
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11985
Reviewed By: anand1976
Differential Revision: D50698039
Pulled By: ajkr
fbshipit-source-id: 1e42113b58823088d7c0c3a92af5b3efbb5f5296
Summary:
**Context/Summary:**
It's intuitive for users to assume `TablePropertiesCollector::Finish()` is called only once by RocksDB internal by the word "finish".
However, this is currently not true as RocksDB also calls this function in `BlockBased/PlainTableBuilder::GetTableProperties()` to populate user collected properties on demand.
This PR avoids that by moving that populating to where we first call `Finish()` (i.e, `NotifyCollectTableCollectorsOnFinish`)
Bonus: clarified in the API that `GetReadableProperties()` will be called after `Finish()` and added UT to ensure that.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12053
Test Plan:
- Modified test `DBPropertiesTest.GetUserDefinedTableProperties` to ensure `Finish()` only called once.
- Existing test particularly `db_properties_test, table_properties_collector_test` verify the functionality `NotifyCollectTableCollectorsOnFinish` and `GetReadableProperties()` are not broken by this change.
Reviewed By: ajkr
Differential Revision: D51095434
Pulled By: hx235
fbshipit-source-id: 1c6275258f9b99dedad313ee8427119126817973
Summary:
Implementation of `GetEntity()` API that returns wide-column entities as AttributeGroups from multiple column families for a single key. Regarding the definition of Attribute groups, please see the detailed example description in PR https://github.com/facebook/rocksdb/issues/11925
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11943
Test Plan:
- `DBWideBasicTest::GetEntityAsPinnableAttributeGroups` added
will enable the new API in the `db_stress` after merging
Reviewed By: ltamasi
Differential Revision: D50195794
Pulled By: jaykorean
fbshipit-source-id: 218d54841ac7e337de62e13b1233b0a99bd91af3
Summary:
- The struct previously named `OffpeakTimeInfo` has been renamed to `OffpeakTimeOption` to indicate that it's a user-configurable option. Additionally, a new struct, `OffpeakTimeInfo`, has been introduced, which includes two fields: `is_now_offpeak` and `seconds_till_next_offpeak_start`. This change prevents the need to parse the `daily_offpeak_time_utc` string twice.
- It's worth noting that we may consider adding more fields to the `OffpeakTimeInfo` struct, such as `elapsed_seconds` and `total_seconds`, as needed for further optimization.
- Within `VersionStorageInfo::ComputeFilesMarkedForPeriodicCompaction()`, we've adjusted the `allowed_time_limit` to include files that are expected to expire by the next offpeak start.
- We might explore further optimizations, such as evenly distributing files to mark during offpeak hours, if the initial approach results in marking too many files simultaneously during the first scoring in offpeak hours. The primary objective of this PR is to prevent periodic compactions during non-offpeak hours when offpeak hours are configured. We'll start with this straightforward solution and assess whether it suffices for now.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12031
Test Plan:
Unit Tests added
- `DBCompactionTest::LevelPeriodicCompactionOffpeak` for Leveled
- `DBTestUniversalCompaction2::PeriodicCompaction` for Universal
Reviewed By: cbi42
Differential Revision: D50900292
Pulled By: jaykorean
fbshipit-source-id: 267e7d3332d45a5d9881796786c8650fa0a3b43d
Summary:
.. and update some unit tests that failed with this change. See comment in ExternalSSTFileBasicTest.IngestFileWithCorruptedDataBlock for more explanation.
The missing status check is not caught by `ASSERT_STATUS_CHECKED=1` due to this line: 8505b26db1/table/block_based/block.h (L394). Will explore if we can remove it.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12042
Test Plan: existing unit tests.
Reviewed By: ajkr
Differential Revision: D50994769
Pulled By: cbi42
fbshipit-source-id: c91615bccd6094a91634c50b98401d456cbb927b
Summary:
Almost each of VersionEdit private member has its own getter and setter. Current code access them with a combination of directly accessing private members and via getter and setters. There is no obvious benefits to have this pattern except potential performance gains. I tried this simple benchmark for removing the friends pattern completely, and there is no obvious regression. So I think it would good to remove VersionEdit's friends completely.
```TEST_TMPDIR=/dev/shm/rocksdb1 ./db_bench -benchmarks=fillseq -memtablerep=vector -allow_concurrent_memtable_write=false -num_column_families=10 -num=50000000```
With change:
fillseq : 2.994 micros/op 333980 ops/sec 149.710 seconds 50000000 operations; 36.9 MB/s
fillseq : 3.033 micros/op 329656 ops/sec 151.673 seconds 50000000 operations; 36.5 MB/s
fillseq : 2.991 micros/op 334369 ops/sec 149.535 seconds 50000000 operations; 37.0 MB/s
Without change:
fillseq : 3.015 micros/op 331715 ops/sec 150.732 seconds 50000000 operations; 36.7 MB/s
fillseq : 3.044 micros/op 328553 ops/sec 152.182 seconds 50000000 operations; 36.3 MB/s
fillseq : 3.091 micros/op 323520 ops/sec 154.550 seconds 50000000 operations; 35.8 MB/s
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12024
Reviewed By: pdillinger
Differential Revision: D50806066
Pulled By: jowlyzhang
fbshipit-source-id: 35d287ce638a38c30f243f85992e615b4c90eb27
Summary:
cbi42 helped investigation and found a potential scenario where `RecoverFromRetryableBGIOError()` may start with `recovery_in_prog_ ` set as false. (and other booleans like `bg_error_` and `soft_error_no_bg_work_`)
**Thread 1**
- `StartRecoverFromRetryableBGIOError()`): (mutex held) sets `recovery_in_prog_ = true`
**Thread 1's `recovery_thread_`**
- (waits for mutex and acquires it)
- `RecoverFromRetryableBGIOError()` -> `ResumeImpl()` -> `ClearBGError()`: sets `recovery_in_prog_ = false`
- `ClearBGError()` -> `NotifyOnErrorRecoveryEnd()`: releases `mutex`
**Thread 2**
- `StartRecoverFromRetryableBGIOError()`): (mutex held) sets `recovery_in_prog_ = true`
- Waits for Thread 1 (`recovery_thread_`) to finish
**Thread 1's `recovery_thread_`**
- re-lock mutex in `NotifyOnErrorRecoveryEnd()`
- Still inside `RecoverFromRetryableBGIOError()`: sets `recovery_in_prog_ = false`
- Done
**Thread 2's `recovery_thread_`**
- recovery thread started with `recovery_in_prog_` set as `false`
# Fix
- Remove double-clearing `bg_error_`, `recovery_in_prog_` and other fields after `ResumeImpl()` already returned `OK()`.
- Minor typo and linter fixes in `DBErrorHandlingFSTest`
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11991
Test Plan:
- `DBErrorHandlingFSTest::MultipleRecoveryThreads` added to reproduce the scenario.
- Adding `assert(recovery_in_prog_);` at the start of `ErrorHandler::RecoverFromRetryableBGIOError()` fails the test without the fix and succeeds with the fix as expected.
Reviewed By: cbi42
Differential Revision: D50506113
Pulled By: jaykorean
fbshipit-source-id: 6dabe01e9ecd3fc50bbe9019587f2f4858bed9c6
Summary:
As titled. If SstFileManager is available, deleting stale sst files will be delegated to it so it can be rate limited.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12016
Reviewed By: hx235
Differential Revision: D50670482
Pulled By: jowlyzhang
fbshipit-source-id: bde5b76ea1d98e67f6b4f08bfba3db48e46aab4e
Summary:
As mentioned in https://github.com/facebook/rocksdb/issues/11893, we are going to use the offpeak time information to pre-process TTL-based compactions. To do so, we need to access `daily_offpeak_time_utc` in `VersionStorageInfo::ComputeCompactionScore()` where we pick the files to compact. This PR is to make the offpeak time information available at the time of compaction-scoring. We are not changing any compaction scoring logic just yet. Will follow up in a separate PR.
There were two ways to achieve what we want.
1. Make `MutableDBOptions` available in `ColumnFamilyData` and `ComputeCompactionScore()` take `MutableDBOptions` along with `ImmutableOptions` and `MutableCFOptions`.
2. Make `daily_offpeak_time_utc` and `IsNowOffpeak()` available in `VersionStorageInfo`.
We chose the latter as it involves smaller changes.
This change includes the following
- Introduction of `OffpeakTimeInfo` and `IsNowOffpeak()` has been moved from `MutableDBOptions`
- `OffpeakTimeInfo` added to `VersionSet` and it can be set during construction and by `ChangeOffpeakTimeInfo()`
- During `SetDBOptions()`, if offpeak time info needs to change, it calls `MaybeScheduleFlushOrCompaction()` to re-compute compaction scores and process compactions as needed
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12018
Test Plan:
- `DBOptionsTest::OffpeakTimes` changed to include checks for `MaybeScheduleFlushOrCompaction()` calls and `VersionSet`'s OffpeakTimeInfo value change during `SetDBOptions()`.
- `VersionSetTest::OffpeakTimeInfoTest` added to test `ChangeOffpeakTimeInfo()`. `IsNowOffpeak()` tests moved from `DBOptionsTest::OffpeakTimes`
Reviewed By: pdillinger
Differential Revision: D50723881
Pulled By: jaykorean
fbshipit-source-id: 3cff0291936f3729c0e9c7750834b9378fb435f6
Summary:
**Context:**
DB destruction will wait for ongoing error recovery through `EndAutoRecovery()` and join the recovery thread: 519f2a41fb/db/db_impl/db_impl.cc (L525) -> 519f2a41fb/db/error_handler.cc (L250) -> 519f2a41fb/db/error_handler.cc (L808-L823)
However, due to a race between flush error recovery and db destruction, recovery can actually start after such wait during the db shutdown. The consequence is that the recovery thread created as part of this recovery will not be properly joined upon its destruction as part the db destruction. It then crashes the program as below.
```
std::terminate()
std::default_delete<std::thread>::operator()(std::thread*) const
std::unique_ptr<std::thread, std::default_delete<std::thread>>::~unique_ptr()
rocksdb::ErrorHandler::~ErrorHandler() (rocksdb/db/error_handler.h:31)
rocksdb::DBImpl::~DBImpl() (rocksdb/db/db_impl/db_impl.cc:725)
rocksdb::DBImpl::~DBImpl() (rocksdb/db/db_impl/db_impl.cc:725)
rocksdb::DBTestBase::Close() (rocksdb/db/db_test_util.cc:678)
```
**Summary:**
This PR fixed it by considering whether EndAutoRecovery() has been called before creating such thread. This fix is similar to how we currently [handle](519f2a41fb/db/error_handler.cc (L688-L694)) such case inside the created recovery thread.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12002
Test Plan: A new UT repro-ed the crash before this fix and and pass after.
Reviewed By: ajkr
Differential Revision: D50586191
Pulled By: hx235
fbshipit-source-id: b372f6d7a94eadee4b9283b826cc5fb81779a093
Summary:
With fragmented record span across multiple blocks, if any following blocks corrupted with arbitary data, and intepreted log number less than the current log number, program will fall into infinite loop due to
not skipping buffer leading bytes
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11979
Test Plan: existing unit tests
Reviewed By: ajkr
Differential Revision: D50604408
Pulled By: jowlyzhang
fbshipit-source-id: e50a0c7e7c3d293fb9d5afec0a3eb4a1835b7a3b
Summary:
... and other fixes for crash test after https://github.com/facebook/rocksdb/issues/11922.
* When pre-allocating sequence numbers for establishing a time history, record that last sequence number in the manifest so that it is (most likely) restored on recovery even if no user writes were made or were recovered (e.g. no WAL).
* When pre-allocating sequence numbers for establishing a time history, only do this for actually new DBs.
* Remove the feature that ensures non-zero sequence number on creating the first column family with preserve/preclude option after initial DB::Open. Until fixed in a way compatible with the crash test, this creates a gap where some data written with active preserve/preclude option won't have a known associated time.
Together, these ensure we don't upset the crash test by manipulating sequence numbers after initial DB creation (esp when re-opening with different options). (The crash test expects that the seqno after re-open corresponds to a known point in time from previous crash test operation, matching an expected DB state.)
Follow-up work:
* Re-fill the gap to ensure all data written under preserve/preclude settings have a known time estimate.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11995
Test Plan:
Added to unit test SeqnoTimeTablePropTest.PrePopulateInDB
Verified fixes two crash test scenarios:
## 1st reproducer
First apply
```
diff --git a/db_stress_tool/expected_state.cc b/db_stress_tool/expected_state.cc
index b483e154c..ef63b8d6c 100644
--- a/db_stress_tool/expected_state.cc
+++ b/db_stress_tool/expected_state.cc
@@ -333,6 +333,7 @@ Status FileExpectedStateManager::SaveAtAndAfter(DB* db) {
s = NewFileTraceWriter(Env::Default(), soptions, trace_file_path,
&trace_writer);
}
+ if (getenv("CRASH")) assert(false);
if (s.ok()) {
TraceOptions trace_opts;
trace_opts.filter |= kTraceFilterGet;
```
Then
```
mkdir -p /dev/shm/rocksdb_test/rocksdb_crashtest_expected
mkdir -p /dev/shm/rocksdb_test/rocksdb_crashtest_whitebox
rm -rf /dev/shm/rocksdb_test/rocksdb_crashtest_*/*
CRASH=1 ./db_stress --db=/dev/shm/rocksdb_test/rocksdb_crashtest_whitebox --expected_values_dir=/dev/shm/rocksdb_test/rocksdb_crashtest_expected --destroy_db_initially=1 --manual_wal_flush_one_in=1000000 --clear_column_family_one_in=0 --preserve_internal_time_seconds=36000
./db_stress --db=/dev/shm/rocksdb_test/rocksdb_crashtest_whitebox --expected_values_dir=/dev/shm/rocksdb_test/rocksdb_crashtest_expected --destroy_db_initially=0 --manual_wal_flush_one_in=1000000 --clear_column_family_one_in=0 --preserve_internal_time_seconds=0
```
Without the fix you get
```
...
DB path: [/dev/shm/rocksdb_test/rocksdb_crashtest_whitebox]
(Re-)verified 34 unique IDs
Error restoring historical expected values: Corruption: DB is older than any restorable expected state
```
## 2nd reproducer
First apply
```
diff --git a/db_stress_tool/db_stress_test_base.cc b/db_stress_tool/db_stress_test_base.cc
index 62ddead7b..f2654980f 100644
--- a/db_stress_tool/db_stress_test_base.cc
+++ b/db_stress_tool/db_stress_test_base.cc
@@ -1126,6 +1126,7 @@ void StressTest::OperateDb(ThreadState* thread) {
// OPERATION write
TestPut(thread, write_opts, read_opts, rand_column_families, rand_keys,
value);
+ if (getenv("CRASH")) assert(false);
} else if (prob_op < del_bound) {
assert(write_bound <= prob_op);
// OPERATION delete
```
Then
```
rm -rf /dev/shm/rocksdb_test/rocksdb_crashtest_*/*
CRASH=1 ./db_stress --db=/dev/shm/rocksdb_test/rocksdb_crashtest_whitebox --expected_values_dir=/dev/shm/rocksdb_test/rocksdb_crashtest_expected --destroy_db_initially=1 --manual_wal_flush_one_in=1000000 --clear_column_family_one_in=0 --disable_wal=1 --reopen=0 --preserve_internal_time_seconds=0
./db_stress --db=/dev/shm/rocksdb_test/rocksdb_crashtest_whitebox --expected_values_dir=/dev/shm/rocksdb_test/rocksdb_crashtest_expected --destroy_db_initially=0 --manual_wal_flush_one_in=1000000 --clear_column_family_one_in=0 --disable_wal=1 --reopen=0 --preserve_internal_time_seconds=3600
```
Without the fix you get
```
DB path: [/dev/shm/rocksdb_test/rocksdb_crashtest_whitebox]
(Re-)verified 34 unique IDs
db_stress: db_stress_tool/expected_state.cc:380: virtual rocksdb::{anonymous}::ExpectedStateTraceRecordHandler::~
ExpectedStateTraceRecordHandler(): Assertion `IsDone()' failed.
```
Reviewed By: jowlyzhang
Differential Revision: D50533346
Pulled By: pdillinger
fbshipit-source-id: 1056be45c5b9e537c8c601b28c4b27431a782477
Summary:
Context/Summary: as titled
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11957
Test Plan: piggyback on existing tests; fixed a failed test due to adding new stats
Reviewed By: ajkr, cbi42
Differential Revision: D50294310
Pulled By: hx235
fbshipit-source-id: d99b97ebac41efc1bdeaf9ca7a1debd2927d54cd
Summary:
... when compiled with ASSERT_STATUS_CHECKED = 1.
The main change is in iterator_wrapper.h. The remaining changes are just fixing existing unit tests. Adding this check to IteratorWrapper gives a good coverage as the class is used in many places, including child iterators under merging iterator, merging iterator under DB iter, file_iter under level iterator, etc. This change can catch the bug fixed in https://github.com/facebook/rocksdb/issues/11782.
Future follow up: enable `ASSERT_STATUS_CHECKED=1` for stress test and for DEBUG_LEVEL=0.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11975
Test Plan:
* `ASSERT_STATUS_CHECKED=1 DEBUG_LEVEL=2 make -j32 J=32 check`
* I tried to run stress test with `ASSERT_STATUS_CHECKED=1`, but there are a lot of existing stress code that ignore status checking, and fail without the change in this PR. So defer that to a follow up task.
Reviewed By: ajkr
Differential Revision: D50383790
Pulled By: cbi42
fbshipit-source-id: 1a28ce0f5fdf1890f93400b26b3b1b3a287624ce
Summary:
A race condition between recovery and backup can happen with error messages like this:
```Failure in BackupEngine::CreateNewBackup with: IO error: No such file or directory: While opening a file for sequentially reading: /dev/shm/rocksdb_test/rocksdb_crashtest_whitebox/002653.log: No such file or directory```
PR https://github.com/facebook/rocksdb/issues/6949 introduced disabling file deletion during error handling of manifest IO errors. Aformentioned race condition is caused by this chain of event:
[Backup engine] disable file deletion
[Recovery] disable file deletion <= this is optional for the race condition, it may or may not get called
[Backup engine] get list of file to copy/link
[Recovery] force enable file deletion
.... some files refered by backup engine get deleted
[Backup engine] copy/link file <= error no file found
This PR fixes this with:
1) Recovery thread is currently forcing enabling file deletion as long as file deletion is disabled. Regardless of whether the previous error handling is for manifest IO error and that disabled it in the first place. This means it could incorrectly enabling file deletions intended by other threads like backup threads, file snapshotting threads. This PR does this check explicitly before making the call.
2) `disable_delete_obsolete_files_` is designed as a counter to allow different threads to enable and disable file deletion separately. The recovery thread currently does a force enable file deletion, because `ErrorHandler::SetBGError()` can be called multiple times by different threads when they receive a manifest IO error(details per PR https://github.com/facebook/rocksdb/issues/6949), resulting in `DBImpl::DisableFileDeletions` to be called multiple times too. Making a force enable file deletion call that resets the counter `disable_delete_obsolete_files_` to zero is a workaround for this. However, as it shows in the race condition, it can incorrectly suppress other threads like a backup thread's intention to keep the file deletion disabled. <strike>This PR adds a `std::atomic<int> disable_file_deletion_count_` to the error handler to track the needed counter decrease more precisely</strike>. This PR tracks and caps file deletion enabling/disabling in error handler.
3) for recovery, the section to find obsolete files and purge them was moved to be done after the attempt to enable file deletion. The actual finding and purging is more likely to happen if file deletion was previously disabled and get re-enabled now. An internal function `DBImpl::EnableFileDeletionsWithLock` was added to support change 2) and 3). Some useful logging was explicitly added to keep those log messages around.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11955
Test Plan: existing unit tests
Reviewed By: anand1976
Differential Revision: D50290592
Pulled By: jowlyzhang
fbshipit-source-id: 73aa8331ca4d636955a5b0324b1e104a26e00c9b
Summary:
This has become obsolete with the new `options_mutex_` in https://github.com/facebook/rocksdb/pull/11929
* Remove now-unnecessary parameter from WriteOptionsFile
* Rename (and negate) other parameter for better clarity (the caller shouldn't tell the callee what the callee needs, just what the caller knows, provides, and requests)
* Move a ROCKS_LOG_WARN (I/O) in WriteOptionsFile to outside of holding DB mutex.
* Also *avoid* (but not always eliminate) write queue synchronization in SetDBOptions. Still needed if there was a change to WAL size limit or other configuration.
* Improve some comments
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11951
Test Plan: existing unit tests and TSAN crash test local run
Reviewed By: ajkr
Differential Revision: D50247904
Pulled By: pdillinger
fbshipit-source-id: 7dfe445c705ec013886a2adb7c50abe50d83af69
Summary:
Introducing the notion of AttributeGroup by adding the `MultiGetEntity()` API retrieving `PinnableAttributeGroups`.
An "attribute group" refers to a logical grouping of wide-column entities within RocksDB. These attribute groups are implemented using column families.
Users can store WideColumns in different CFs for various reasons (e.g. similar access patterns, same types, etc.). This new API `MultiGetEntity()` takes keys and `PinnableAttributeGroups` per key. `PinnableAttributeGroups` is just a list of `PinnableAttributeGroup`s in which we have `ColumnFamilyHandle*`, `Status`, and `PinnableWideColumns`.
Let's say a user stored "hot" wide columns in column family "hot_data_cf" and "cold" wide columns in column family "cold_data_cf" and all other columns in "common_cf".
Prior to this PR, if the user wants to query for two keys, "key_1" and "key_2" and but only interested in "common_cf" and "hot_data_cf" for "key_1", and "common_cf" and "cold_data_cf" for "key_2", the user would have to construct input like `keys = ["key_1", "key_1", "key_2", "key_2"]`, `column_families = ["common_cf", "hot_data_cf", "common_cf", "cold_data_cf"]` and get the flat list of `PinnableWideColumns` to find the corresponding <key,CF> combo.
With the new `MultiGetEntity()` introduced in this PR, users can now query only `["common_cf", "hot_data_cf"]` for `"key_1"`, and only `["common_cf", "cold_data_cf"]` for `"key_2"`. The user will get `PinnableAttributeGroups` for each key, and `PinnableAttributeGroups` gives a list of `PinnableAttributeGroup`s where the user can find column family and corresponding `PinnableWideColumns` and the `Status`.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11925
Test Plan:
- `DBWideBasicTest::MultiCFMultiGetEntityAsPinnableAttributeGroups` added
will enable this new API in the `db_stress` in a separate PR
Reviewed By: ltamasi
Differential Revision: D50017414
Pulled By: jaykorean
fbshipit-source-id: 643611d1273c574bc81b94c6f5aeea24b40c4586
Summary:
We saw the following TSAN stress test failure:
```
WARNING: ThreadSanitizer: data race (pid=17523)
Write of size 1 at 0x7b8c000008b9 by thread T4243 (mutexes: write M0):
#0 rocksdb::ErrorHandler::RecoverFromRetryableBGIOError() fbcode/internal_repo_rocksdb/repo/db/error_handler.cc:742 (db_stress+0x95f954) (BuildId: 35795dfb86ddc9c4f20ddf08a491f24d)
https://github.com/facebook/rocksdb/issues/1 std:🧵:_State_impl<std:🧵:_Invoker<std::tuple<void (rocksdb::ErrorHandler::*)(), rocksdb::ErrorHandler*>>>::_M_run() fbcode/third-party-buck/platform010/build/libgcc/include/c++/trunk/bits/invoke.h:74 (db_stress+0x95fc2b) (BuildId: 35795dfb86ddc9c4f20ddf08a491f24d)
https://github.com/facebook/rocksdb/issues/2 execute_native_thread_routine /home/engshare/third-party2/libgcc/11.x/src/gcc-11.x/x86_64-facebook-linux/libstdc++-v3/src/c++11/../../../.././libstdc++-v3/src/c++11/thread.cc:82:18 (libstdc++.so.6+0xdf4e4) (BuildId: 452d1cdae868baeeb2fdf1ab140f1c219bf50c6e)
Previous read of size 1 at 0x7b8c000008b9 by thread T22:
#0 rocksdb::DBImpl::SyncClosedLogs(rocksdb::JobContext*, rocksdb::VersionEdit*) fbcode/internal_repo_rocksdb/repo/db/error_handler.h:76 (db_stress+0x84f69c) (BuildId: 35795dfb86ddc9c4f20ddf08a491f24d)
```
This is due to a data race in accessing `recovery_in_prog_`. This PR fixes it by accessing `recovery_in_prog_` under db mutex before calling `SyncClosedLogs()`. I think the original PR https://github.com/facebook/rocksdb/pull/10489 intended to clear the error if it's a recovery flush. So ideally we can also just check flush reason. I plan to keep a safer change in this PR and make that change in the future if needed.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11950
Test Plan: check future TSAN stress test results.
Reviewed By: anand1976
Differential Revision: D50242255
Pulled By: cbi42
fbshipit-source-id: 0d487948ef9546b038a34460f3bb037f6e5bfc58
Summary:
We were seeing the following stress test failures:
```LevelCompactionBuilder::PickFileToCompact(const rocksdb::autovector<std::pair<int, rocksdb::FileMetaData*> >&, bool): Assertion `!level_file.second->being_compacted' failed```
This can happen when we are picking a file to be compacted from some files marked for compaction, but that file is already being_compacted. We prevent this by always calling `ComputeCompactionScore()` after we pick a compaction and mark some files as being_compacted. However, if SetOptions() is called to disable marking certain files to be compacted, say `enable_blob_garbage_collection`, we currently just skip the relevant logic in `ComputeCompactionScore()` without clearing the existing files already marked for compaction. This PR fixes this issue by already clearing these files.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11946
Test Plan: existing tests.
Reviewed By: akankshamahajan15
Differential Revision: D50232608
Pulled By: cbi42
fbshipit-source-id: 11e4fb5e9d48b0f946ad33b18f7c005f0161f496
Summary:
In follow-up to https://github.com/facebook/rocksdb/issues/11922, fix a race in functions like CreateColumnFamily and SetDBOptions where the DB reports one option setting but a different one is left in effect.
To fix, we can add an extra mutex around these rare operations. We don't want to hold the DB mutex during I/O or other slow things because of the many purposes it serves, but a mutex more limited to these cases should be fine.
I believe this would fix a write-write race in https://github.com/facebook/rocksdb/issues/10079 but not the read-write race.
Intended follow-up to this:
* Should be able to remove write thread synchronization from DBImpl::WriteOptionsFile
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11929
Test Plan:
Added two mini-stress style regression tests that fail with >1% probability before this change:
DBOptionsTest::SetStatsDumpPeriodSecRace
ColumnFamilyTest::CreateAndDropPeriodicRace
I haven't reproduced such an inconsistency between in-memory options and on disk latest options, but this change at least improves safety and adds a test anyway:
DBOptionsTest::SetStatsDumpPeriodSecRace
Reviewed By: ajkr
Differential Revision: D50024506
Pulled By: pdillinger
fbshipit-source-id: 1e99a9ed4d96fdcf3ac5061ec6b3cee78aecdda4
Summary:
1. Prevent a double join on a `port::Thread`
2. Ensure `recovery_in_prog_` and `bg_error_` are both set under same lock hold. This is useful for writers who see a non-OK `bg_error_` and are deciding whether to stall based on whether the error will be auto-recovered.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11939
Reviewed By: cbi42
Differential Revision: D50155484
Pulled By: ajkr
fbshipit-source-id: fbc1f85c50e7eaee27ee0e376aee688d8a06c93b
