Summary:
We have three layers of block cache that often use the same key
but map to different physical data:
* BlockBasedTableOptions::block_cache
* BlockBasedTableOptions::block_cache_compressed
* BlockBasedTableOptions::persistent_cache
If any two of these happen to share an underlying implementation and key
space (insertion into one shows up in another), then memory safety is
broken. The simplest case is block_cache == block_cache_compressed.
(Credit mrambacher for asking about this case in a review.)
With this change, we explicitly check for overlap and preemptively and
safely fail with a Status code.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9172
Test Plan: test added. Crashes without new check
Reviewed By: anand1976
Differential Revision: D32465659
Pulled By: pdillinger
fbshipit-source-id: 3876b45b6dce6167e5a7a642725ddc86b96f8e40
Summary:
When defining a template class, the constructor should be specified
simply using the class name; it does not take template arguments.a
Apparently older versions of gcc and clang did not complain about this
syntax, but gcc 11.x and recent versions of clang both complain about
this file.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9173
Test Plan:
When building with platform010 I got compile errors in this file both
in `mode/dev` (clang) and in `mode/opt-gcc`. This diff fixes the
compile failures.
Reviewed By: ajkr
Differential Revision: D32455881
Pulled By: simpkins
fbshipit-source-id: 0682910d9e2cdade94ce1e77973d47ac04d9f7e2
Summary:
* Parallel `make check` would pass if a test binary failed to list gtest
tests. This is now likely to report as a failure.
* Crazy perl was generating some extra incorrect test names causing
extra files and binary invocations. Fixed with cleaner awk.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9160
Test Plan:
For first part, add an 'assert(false);' to start of hash_test main and
see 'make check' pass before, and fail after.
For second part, inspect t/ directory before vs. after. Number of
executed tests is same:
$ cat log* | grep 'PASSED.*test' | awk '{ tot += $4; } END { print tot; }'
10469
Reviewed By: ajkr
Differential Revision: D32372006
Pulled By: pdillinger
fbshipit-source-id: 185b3db2b67e3f9198eb75322e4d0493e4fc1beb
Summary:
**Context:**
Some existing internal calls of `GenericRateLimiter::Request()` in backupable_db.cc and newly added internal calls in https://github.com/facebook/rocksdb/pull/8722/ do not make sure `bytes <= GetSingleBurstBytes()` as required by rate_limiter https://github.com/facebook/rocksdb/blob/master/include/rocksdb/rate_limiter.h#L47.
**Impacts of this bug include:**
(1) In debug build, when `GenericRateLimiter::Request()` requests bytes greater than `GenericRateLimiter:: kMinRefillBytesPerPeriod = 100` byte, process will crash due to assertion failure. See https://github.com/facebook/rocksdb/pull/9063#discussion_r737034133 and for possible scenario
(2) In production build, although there will not be the above crash due to disabled assertion, the bug can lead to a request of small bytes being blocked for a long time by a request of same priority with insanely large bytes from a different thread. See updated https://github.com/facebook/rocksdb/wiki/Rate-Limiter ("Notice that although....the maximum bytes that can be granted in a single request have to be bounded...") for more info.
There is an on-going effort to move rate-limiting to file wrapper level so rate limiting in `BackupEngine` and this PR might be made obsolete in the future.
**Summary:**
- Implemented loop-calling `GenericRateLimiter::Request()` with `bytes <= GetSingleBurstBytes()` as a static private helper function `BackupEngineImpl::LoopRateLimitRequestHelper`
-- Considering make this a util function in `RateLimiter` later or do something with `RateLimiter::RequestToken()`
- Replaced buggy internal callers with this helper function wherever requested byte is not pre-limited by `GetSingleBurstBytes()`
- Removed the minimum refill bytes per period enforced by `GenericRateLimiter` since it is useless and prevents testing `GenericRateLimiter` for extreme case with small refill bytes per period.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9063
Test Plan:
- Added a new test that failed the assertion before this change and now passes
- It exposed bugs in [the write during creation in `CopyOrCreateFile()`](df7cc66e17/utilities/backupable/backupable_db.cc (L2034-L2043)), [the read of table properties in `GetFileDbIdentities()`](df7cc66e17/utilities/backupable/backupable_db.cc (L2372-L2378)), [some read of metadata in `BackupMeta::LoadFromFile()`](df7cc66e17/utilities/backupable/backupable_db.cc (L2726))
- Passing Existing tests
Reviewed By: ajkr
Differential Revision: D31824535
Pulled By: hx235
fbshipit-source-id: d2b3dea7a64e2a4b1e6a59fca322f0800a4fcbcc
Summary:
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9162
Existing TransactionUtil::CheckKeyForConflict() performs only seq-based
conflict checking. If user-defined timestamp is enabled, it should perform
conflict checking based on timestamps too.
Update TransactionUtil::CheckKey-related methods to verify the timestamp of the
latest version of a key is smaller than the read timestamp. Note that
CheckKeysForConflict() is not updated since it's used only by optimistic
transaction, and we do not plan to update it in this upcoming batch of diffs.
Existing GetLatestSequenceForKey() returns the sequence of the latest
version of a specific user key. Since we support user-defined timestamp, we
need to update this method to also return the timestamp (if enabled) of the
latest version of the key. This will be needed for snapshot validation.
Reviewed By: ltamasi
Differential Revision: D31567960
fbshipit-source-id: 2e4a14aed267435a9aa91bc632d2411c01946d44
Summary:
This makes it easier to debug with tools like `ps`. The change only
applies to builds with glibc 2.30+ and _GNU_SOURCE extensions enabled.
We could adopt it in more cases by using the syscall but this is enough
for our build.
Replaces https://github.com/facebook/rocksdb/issues/2973.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9164
Test Plan:
- ran some benchmarks and correlated logged thread IDs with those shown by `ps -L`.
- verified no noticeable regression in throughput for log heavy (more than 700k log lines and over 5k / second) scenario.
Benchmark command:
```
$ TEST_TMPDIR=/dev/shm ./db_bench -benchmarks=filluniquerandom -compression_type=none -max_bytes_for_level_multiplier=2 -write_buffer_size=262144 -num_levels=7 -max_bytes_for_level_base=2097152 -target_file_size_base=524288 -level_compaction_dynamic_level_bytes=true -max_background_jobs=12 -num=20000000
```
Results before: 15.9MB/s, 15.8MB/s, 16.0MB/s
Results after: 16.3MB/s, 16.3MB/s, 15.8MB/s
- Rely on CI to test the fallback behavior
Reviewed By: riversand963
Differential Revision: D32399660
Pulled By: ajkr
fbshipit-source-id: c24d44fdf7782faa616ef0a0964eaca3539d9c24
Summary:
I was unable to figure out the behavior by reading the old doc so attempted to
write it differently.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9154
Reviewed By: riversand963
Differential Revision: D32338843
Pulled By: ajkr
fbshipit-source-id: e1e67720cd92572b195583e5ea2c592180d4fefd
Summary:
Implement the Name() method in FileSystemWrapper, since https://github.com/facebook/rocksdb/issues/8649 removed it and it can cause compilation failures. We can deprecate it in RocksDB 7.0.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9156
Reviewed By: riversand963
Differential Revision: D32363977
Pulled By: anand1976
fbshipit-source-id: 1e5a2fec2ab0649255720d89abf5bac26bb64ded
Summary:
RocksDB does auto-readahead for iterators on noticing more than two sequential reads for a table file if user doesn't provide readahead_size. The readahead starts at 8KB and doubles on every additional read up to max_auto_readahead_size. However at each level, if iterator moves over next file, readahead_size starts again from 8KB.
This PR introduces a new ReadOption "adaptive_readahead" which when set true will maintain readahead_size at each level. So when iterator moves from one file to another, new file's readahead_size will continue from previous file's readahead_size instead of scratch. However if reads are not sequential it will fall back to 8KB (default) with no prefetching for that block.
1. If block is found in cache but it was eligible for prefetch (block wasn't in Rocksdb's prefetch buffer), readahead_size will decrease by 8KB.
2. It maintains readahead_size for L1 - Ln levels.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9056
Test Plan:
Added new unit tests
Ran db_bench for "readseq, seekrandom, seekrandomwhilewriting, readrandom" with --adaptive_readahead=true and there was no regression if new feature is enabled.
Reviewed By: anand1976
Differential Revision: D31773640
Pulled By: akankshamahajan15
fbshipit-source-id: 7332d16258b846ae5cea773009195a5af58f8f98
Summary:
Track per-SST user-defined timestamp information in MANIFEST https://github.com/facebook/rocksdb/issues/8957
Rockdb has supported user-defined timestamp feature. Application can specify a timestamp
when writing each k-v pair. When data flush from memory to disk file called SST files, file
creation activity will commit to MANIFEST. This commit is for tracking timestamp info in the
MANIFEST for each file. The changes involved are as follows:
1) Track max/min timestamp in FileMetaData, and fix invoved codes.
2) Add NewFileCustomTag::kMinTimestamp and NewFileCustomTag::kMinTimestamp in
NewFileCustomTag ( in the kNewFile4 part ), and support invoved codes such as
VersionEdit Encode and Decode etc.
3) Add unit test code for VersionEdit EncodeDecodeNewFile4, and fix invoved test codes.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9092
Reviewed By: ajkr, akankshamahajan15
Differential Revision: D32252323
Pulled By: riversand963
fbshipit-source-id: d2642898d6e3ad1fef0eb866b98045408bd4e162
Summary:
It seems that an incorrect native source file entry was introduced in https://github.com/facebook/rocksdb/pull/8999. For some reason it appears that CI was not run against that PR, and so the problem was not detected.
This PR fixes the problem by removing the invalid entry, allowing RocksJava to build correctly again.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9147
Reviewed By: pdillinger
Differential Revision: D32300976
fbshipit-source-id: dbd763b806bacf0fc08f4deaf07c63d0a266c4cf
Summary:
Before this fix compilation with GCC 4.8.5 20150623 (Red Hat 4.8.5-36) would fail with the following error:
```
CC jls/db/db_impl/db_impl.o
In file included from ./env/file_system_tracer.h:8:0,
from ./file/random_access_file_reader.h:15,
from ./file/file_prefetch_buffer.h:15,
from ./table/format.h:13,
from ./table/internal_iterator.h:14,
from ./db/pinned_iterators_manager.h:12,
from ./db/range_tombstone_fragmenter.h:15,
from ./db/memtable.h:22,
from ./db/memtable_list.h:16,
from ./db/column_family.h:17,
from ./db/db_impl/db_impl.h:22,
from db/db_impl/db_impl.cc:9:
./include/rocksdb/file_system.h:108:8: error: unused parameter 'opts'
[-Werror=unused-parameter]
struct FileOptions : EnvOptions {
^
db/db_impl/db_impl.cc: In member function 'virtual rocksdb::Status
rocksdb::DBImpl::SetDBOptions(const
std::unordered_map<std::basic_string<char>, std::basic_string<char>
>&)':
db/db_impl/db_impl.cc:1230:36: note: synthesized method
'rocksdb::FileOptions& rocksdb::FileOptions::operator=(const
rocksdb::FileOptions&)' first required here
file_options_for_compaction_ = FileOptions(new_db_options);
^
CC jls/db/db_impl/db_impl_compaction_flush.o
cc1plus: all warnings being treated as errors
make[1]: *** [jls/db/db_impl/db_impl.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory `/rocksdb-local-build'
make: *** [rocksdbjavastatic] Error 2
Makefile:2222: recipe for target 'rocksdbjavastaticdockerarm64v8' failed
make: *** [rocksdbjavastaticdockerarm64v8] Error 2
```
This was detected on both ppc64le and arm64v8, however it does not seem to appear in the same GCC 4.8 version we use for x64 in CircleCI - https://app.circleci.com/pipelines/github/facebook/rocksdb/9691/workflows/c2a94367-14f3-4039-be95-325c34643d41/jobs/227906
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9144
Reviewed By: riversand963
Differential Revision: D32290770
fbshipit-source-id: c90a54ba2a618e1ff3660fff3f3368ab36c3c527
Summary:
For multiple versions (ts + seq) of the same user key, if they cross the boundary of `full_history_ts_low_`,
we should retain the version that is visible to the `full_history_ts_low_`. Namely, we keep the internal key
with the largest timestamp smaller than `full_history_ts_low`.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9116
Test Plan: make check
Reviewed By: ltamasi
Differential Revision: D32261514
Pulled By: riversand963
fbshipit-source-id: e10f47c254c04c05261440051e4f50cb7d95474e
Summary:
Note: This PR is the 3rd PR of a bigger PR stack (https://github.com/facebook/rocksdb/issues/9073) and depends on the second PR (https://github.com/facebook/rocksdb/pull/9071). **See changes from this PR only 00447324d0**
Context:
pdillinger brought up a good [point](https://github.com/facebook/rocksdb/pull/9073#discussion_r741478309) about lacking RAII support for per cache reservation in `CacheReservationManager` when reviewing https://github.com/facebook/rocksdb/pull/9073.
To summarize the discussion, the current API `CacheReservationManager::UpdateCacheReservation()` requires callers to explicitly calculate and pass in a correct`new_mem_used` to release a cache reservation (if they don't want to rely on the clean-up during `CacheReservationManager`'s destruction - such as they want to release it earlier).
While this implementation has convenience in some use-case such as `WriteBufferManager`, where [reservation](https://github.com/facebook/rocksdb/blob/main/memtable/write_buffer_manager.cc#L69-L91) and [release](https://github.com/facebook/rocksdb/blob/main/memtable/write_buffer_manager.cc#L109-L129) amounts do not necessarily correspond symmetrically and thus a flexible `new_mem_used` inputing is needed, it can be prone to caller's calculation error as well as cause a mass of codes in releasing cache in other use-case such as filter construction, where reservation and release amounts do correspond symmetrically and many code paths requiring a cache release, as [pointed](https://github.com/facebook/rocksdb/pull/9073#discussion_r741478309) out by pdillinger.
Therefore we decided to provide a new API in `CacheReservationManager` to update reservation with better RAII support for per cache reservation, using a handle to manage the life time of that particular cache reservation.
- Added a new class `CacheReservationHandle`
- Added a new API `CacheReservationManager::MakeCacheReservation()` that outputs a `CacheReservationHandle` for managing the reservation
- Updated class comments to clarify two different cache reservation methods
Tests:
- Passing new tests
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9130
Reviewed By: pdillinger
Differential Revision: D32199446
Pulled By: hx235
fbshipit-source-id: 1cba7c636e5ecfb55b0c1e0c2d218cc9b5b30b4e
Summary:
Note: This PR is the 2nd PR of a bigger PR stack (https://github.com/facebook/rocksdb/pull/9073).
Context:
`CacheReservationManager::UpdateCacheReservation(std::size_t new_memory_used)` accepts an accumulated total memory used (e.g, used 10MB so far) instead of usage change (e.g, increase by 5 MB, decrease by 5 MB). It has benefits including consolidating API for increase and decrease as described in https://github.com/facebook/rocksdb/pull/8506.
However, not every `CacheReservationManager` user keeps track of this accumulated total memory usage. For example, Bloom/Ribbon Filter construction (e.g, [here](822d729fcd/table/block_based/filter_policy.cc (L587)) in https://github.com/facebook/rocksdb/pull/9073) does not while WriteBufferManager and compression dictionary buffering do.
Considering future users might or might not keep track of this counter and implementing this counter within `CacheReservationManager` is easy due to the passed-in `std::size_t new_memory_used` in calling `CacheReservationManager::UpdateCacheReservation(std::size_t new_memory_used)`, it is proposed to add a new API `CacheReservationManager::GetTotalMemoryUsage()`.
As noted in the API comments, since `CacheReservationManager` is NOT thread-safe, external synchronization is
needed in calling `UpdateCacheReservation()` if you want `GetTotalMemoryUsed()` returns the indeed latest memory used.
- Added and updated private counter `memory_used_` every time `CacheReservationManager::UpdateCacheReservation(std::size_t new_memory_used)` is called regardless if the call returns non-okay status
- Added `CacheReservationManager::GetTotalMemoryUsage()` to return `memory_used_`
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9071
Test Plan:
- Passing new tests
- Passing existing tests
Reviewed By: ajkr
Differential Revision: D31887813
Pulled By: hx235
fbshipit-source-id: 9a09f0c8683822673260362894c878b61ee60ceb
Summary:
The individual commits in this PR should be self-explanatory.
All small and _very_ low-priority changes.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5896
Reviewed By: riversand963
Differential Revision: D18065108
Pulled By: mrambacher
fbshipit-source-id: 236b1a1d9d21f982cc08aa67027108dde5eaf280
Summary:
Allow compaction_job_test, db_io_failure_test, dbformat_test, deletefile_test, and fault_injection_test to use a custom Env object. Also move ```RegisterCustomObjects``` declaration to a header file to simplify things.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9087
Test Plan: Run manually using "buck test rocksdb/src:compaction_job_test_fbcode" etc.
Reviewed By: riversand963
Differential Revision: D32007222
Pulled By: anand1976
fbshipit-source-id: 99af58559e25bf61563dfa95dc46e31fa7375792
Summary:
Add clarification/extension to comments on max_total_wal_size and the Java wrapper MaxTotalWalSize to better explain the effect of the option on log file sizes.
Closes https://github.com/facebook/rocksdb/issues/5789
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9108
Reviewed By: pdillinger
Differential Revision: D32066640
Pulled By: mrambacher
fbshipit-source-id: 7d5affc87e4119019054af9c884a2ea01d68f5b7
Summary:
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9062
Real MySQL-style transactions in MyRocks uses SingleDelete, which is
missing in our existint MySQLStyleTransactionTest. Ths diff by lth fills the
gap in test coverage.
Reviewed By: lth
Differential Revision: D31813015
fbshipit-source-id: 196ad761de30ae9ea1f92257058dfc265f211892
Summary:
Otherwise a rebuild is not done if a RocksDB plugin header file is
changed.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9120
Test Plan:
Build RocksDB with a plugin.
Change a header file of the RocksDB plugin and rebuild.
Signed-off-by: Dennis Maisenbacher <dennis.maisenbacher@wdc.com>
Reviewed By: riversand963
Differential Revision: D32223303
Pulled By: ajkr
fbshipit-source-id: 76d31b10fe915906edc181c7b6398a09b7d079ee
Summary:
…action
```
db/db_with_timestamp_basic_test.cc:2643: Failure
db_->CompactFiles(compact_opt, handles_[cf], collector->GetFlushedFiles(), static_cast<int>(kNumTimestamps - i))
Invalid argument: A compaction must contain at least one file.
```
Able to be reproduced by run multiple test in parallel.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9136
Test Plan:
```
gtest-parallel ./db_with_timestamp_basic_test --gtest_filter=Timestamp/DBBasicTestWithTimestampCompressionSettings.PutAndGetWithCompaction/12 -r 100 -w 100
```
Reviewed By: riversand963
Differential Revision: D32197734
Pulled By: jay-zhuang
fbshipit-source-id: aeb0d6e9b37312f577e203ca81bb7a0f14d4e7ce
Summary:
The patch refactors and unifies the logic in `VersionBuilder::SaveBlobFilesTo`
and `VersionBuilder::GetMinOldestBlobFileNumber` by introducing a generic
helper that can "merge" the list of `BlobFileMetaData` in the base version with
the list of `MutableBlobFileMetaData` representing the updated state after
applying a sequence of `VersionEdit`s. This serves as groundwork for subsequent
changes that will enable us to determine whether a blob file is live after applying
a sequence of edits without calling `VersionBuilder::SaveTo`.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9122
Test Plan: `make check`
Reviewed By: riversand963
Differential Revision: D32151472
Pulled By: ltamasi
fbshipit-source-id: 11622b475866de823334b8bc21b0e99d913af97e
Summary:
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9105
The user contract of SingleDelete is that: a SingleDelete can only be issued to
a key that exists and has NOT been updated. For example, application can insert
one key `key`, and uses a SingleDelete to delete it in the future. The `key`
cannot be updated or removed using Delete.
In reality, especially when write-prepared transaction is being used, things
can get tricky. For example, a prepared transaction already writes `key` to the
memtable after a successful Prepare(). Afterwards, should the transaction
rollback, it will insert a Delete into the memtable to cancel out the prior
Put. Consider the following sequence of operations.
```
// operation sequence 1
Begin txn
Put(key)
Prepare()
Flush()
Rollback txn
Flush()
```
There will be two SSTs resulting from above. One of the contains a PUT, while
the second one contains a Delete. It is also known that releasing a snapshot
can lead to an L0 containing only a SD for a particular key. Consider the
following operations following the above block.
```
// operation sequence 2
db->Put(key)
db->SingleDelete(key)
Flush()
```
The operation sequence 2 can result in an L0 with only the SD.
Should there be a snapshot for conflict checking created before operation
sequence 1, then an attempt to compact the db may hit the assertion failure
below, because ikey_.type is Delete (from a rollback).
```
else if (clear_and_output_next_key_) {
assert(ikey_.type == kTypeValue || ikey_.type == kTypeBlobIndex);
}
```
To fix the assertion failure, we can skip the SingleDelete if we detect an
earlier Delete in the same snapshot interval.
Reviewed By: ltamasi
Differential Revision: D32056848
fbshipit-source-id: 23620a91e28562d91c45cf7e95f414b54b729748
Summary:
It is useful to add options.manual_wal_flush to db_bench
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9132
Test Plan: Run the benchamrk with the option.
Reviewed By: ltamasi
Differential Revision: D32188060
fbshipit-source-id: a70835d3cad0f30095218dfda1daff0a432892e5
Summary:
Note: This PR is the 1st part of a bigger PR stack (https://github.com/facebook/rocksdb/pull/9073).
Context:
Previously, the payload (i.e, filter data) within `BlockBasedTableBuilder::Rep::FilterBlockBuilder` object is not deallocated until `BlockBasedTableBuilder` is deallocated, despite it is no longer useful after its related `filter_content` being written.
- Transferred the payload (i.e, the filter data) out of `BlockBasedTableBuilder::Rep::FilterBlockBuilder` object
- For PartitionedFilter:
- Unified `filters` and `filter_gc` lists into one `std::deque<FilterEntry> filters` by adding a new field `last_filter_entry_key` and storing the `std::unique_ptr filter_data` with the `Slice filter` in the same entry
- Reset `last_filter_data` in the case where `filters` is empty, which should be as by then we would've finish using all the `Slice filter`
- Deallocated the payload by going out of scope as soon as we're done with using the `filter_content` associated with the payload
- This is an internal interface change at the level of `FilterBlockBuilder::Finish()`, which leads to touching the inherited interface in `BlockBasedFilterBlockBuilder`. But for that, the payload transferring is ignored.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9070
Test Plan: - The main focus is to catch segment fault error during `FilterBlockBuilder::Finish()` and `BlockBasedTableBuilder::Finish()` and interface mismatch. Relying on existing CI tests is enough as `assert(false)` was temporarily added to verify the new logic of transferring ownership indeed run
Reviewed By: pdillinger
Differential Revision: D31884933
Pulled By: hx235
fbshipit-source-id: f73ecfbea13788d4fc058013ace27230110b52f4
Summary:
Context:
Surprisingly, there isn't any sanitization against negative `int64_t bytes` in `GenericRateLimiter::Request(int64_t bytes, const Env::IOPriority pri, Statistics* stats)`. A negative `bytes` can be passed in and incorrectly increases `available_bytes_` by subtracting the negative `bytes` from `available_bytes_`, such as [here](https://github.com/facebook/rocksdb/blob/main/util/rate_limiter.cc#L138) and [here](https://github.com/facebook/rocksdb/blob/main/util/rate_limiter.cc#L283), which are incorrect behaviors.
- Sanitized negative request bytes by rounding it up to 0
- Added notes to public and internal API
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9112
Test Plan: - Rely on existing tests
Reviewed By: ajkr
Differential Revision: D32085364
Pulled By: hx235
fbshipit-source-id: b1b6066b2dd5ffc7bcbfb07069ca65a33578251b
Summary:
To prepare for adding checksum to footer and "context aware"
checksums. This also brings closely related code much closer together.
Recently added `BlockBasedTableBuilder::ComputeBlockTrailer` for testing
is made obsolete in the refactoring, as testing the checksums can happen
at a lower level of abstraction.
Also now checking for unrecognized checksum type on reading footer,
rather than later on use.
Also removed an obsolete function delcaration.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9113
Test Plan:
existing tests worked before refactoring to remove
`ComputeBlockTrailer`. And then refactored+improved tests using it.
Reviewed By: mrambacher
Differential Revision: D32090149
Pulled By: pdillinger
fbshipit-source-id: 2879da683c1498ea85a3b70dace9b6d9f6b47b6e
Summary:
Revert "Temporarily disable s390x+cmake* Travis jobs (https://github.com/facebook/rocksdb/issues/9095)"
This reverts commit f2d11b3fdc.
I have now uploaded the CMake deb for s390x provided by jonathan-albrecht-ibm to our S3 bucket.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9110
Reviewed By: ajkr
Differential Revision: D32082903
Pulled By: riversand963
fbshipit-source-id: b7243d19fc133e665a8654e3b528c4f53d5b11d1
Summary:
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9060
RocksDB bottommost level compaction may zero out an internal key's sequence if
the key's sequence is in the earliest_snapshot.
In write-prepared transaction, checking the visibility of a certain sequence in
a specific released snapshot may return a "snapshot released" result.
Therefore, it is possible, after a certain sequence of events, a PUT has its
sequence zeroed out, but a subsequent SingleDelete of the same key will still
be output with its original sequence. This violates the ascending order of
keys and leads to incorrect result.
The solution is to use an extra variable `last_key_seq_zeroed_` to track the
information about visibility in earliest snapshot. With this variable, we can
know for sure that a SingleDelete is in the earliest snapshot even if the said
snapshot is released during compaction before processing the SD.
Reviewed By: ltamasi
Differential Revision: D31813016
fbshipit-source-id: d8cff59d6f34e0bdf282614034aaea99be9174e1
Summary:
Directory fsync might be expensive on btrfs and it may not be needed.
Here are 4 directory fsync cases:
1. creating a new file: dir-fsync is not needed on btrfs, as long as the
new file itself is synced.
2. renaming a file: dir-fsync is not needed if the renamed file is
synced. So an API `FsyncAfterFileRename(filename, ...)` is provided
to sync the file on btrfs. By default, it just calls dir-fsync.
3. deleting files: dir-fsync is forced by set
`IOOptions.force_dir_fsync = true`
4. renaming multiple files (like backup and checkpoint): dir-fsync is
forced, the same as above.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8903
Test Plan: run tests on btrfs and non btrfs
Reviewed By: ajkr
Differential Revision: D30885059
Pulled By: jay-zhuang
fbshipit-source-id: dd2730b31580b0bcaedffc318a762d7dbf25de4a
Summary:
The patch refactors the parts of `VersionBuilder` that deal with SST file
comparisons. Specifically, it makes the following changes:
* Turns `NewestFirstBySeqNo` and `BySmallestKey` from free-standing
functions into function objects. Note: `BySmallestKey` has a pointer to the
`InternalKeyComparator`, while `NewestFirstBySeqNo` is completely
stateless.
* Eliminates the wrapper `FileComparator`, which was essentially an
unnecessary DIY virtual function call mechanism.
* Refactors `CheckConsistencyDetails` and `SaveSSTFilesTo` using helper
function templates that take comparator/checker function objects. Using
static polymorphism eliminates the need to make runtime decisions about
which comparator to use.
* Extends some error messages returned by the consistency checks and
makes them more uniform.
* Removes some incomplete/redundant consistency checks from `VersionBuilder`
and `FilePicker`.
* Improves const correctness in several places.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9099
Test Plan: `make check`
Reviewed By: riversand963
Differential Revision: D32027503
Pulled By: ltamasi
fbshipit-source-id: 621326ae41f4f55f7ad6a91abbd6e666d5c7857c
Summary:
EventListener::OnTableFileCreated was previously called with OK
status and file_size==0 in cases of no SST file contents written
(because there was no content to add) and the empty file deleted before
calling the listener. This could lead to a stress test assertion failure
added in https://github.com/facebook/rocksdb/issues/9054.
This changes the status to Aborted, to align with the API doc:
"... if the file is successfully created. Now it will also be called on
failure case. User can check info.status to see if it succeeded or not."
For internal purposes, this case is considered "success" but for
listener purposes, no SST file is (successfully) created.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9118
Test Plan: test case added + existing db_stress
Reviewed By: ajkr, riversand963
Differential Revision: D32120232
Pulled By: pdillinger
fbshipit-source-id: a804e2e0a52598018d3b182da97804d402ffcdfa
Summary:
TSAN reported data race on count variables in MemPurgeBasic
test. This suggests the test could fail if mempurges were slow enough
that they don't complete before the count variables being checked, but
injecting a long sleep into MemPurge (outside DB mutex) confirms that
blocked writes ensure enough mempurges/flushes happen to make the test
pass. All the possible different values on testing should be OK to make
the test pass.
So this change makes the variables atomic so that up-to-date value is
always read and TSAN report suppressed. I have also used `.exchange(0)`
to make the checking less stateful by "popping off" all the accumulated
counts.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9115
Test Plan: updated test, watch for any flakiness
Reviewed By: riversand963
Differential Revision: D32114432
Pulled By: pdillinger
fbshipit-source-id: c985609d39896a0d8f69ebc87b221e688609bdd8
Summary:
* Clarify that RocksDB is not exception safe on many of our callback
and extension interfaces
* Clarify FSRandomAccessFile::MultiRead implementations must accept
non-sorted inputs (see https://github.com/facebook/rocksdb/issues/8953)
* Clarify ConcurrentTaskLimiter and SstFileManager are not (currently)
extensible interfaces
* Mark WriteBufferManager as `final`, so it is then clearly not a
callback interface, even though it smells like one
* Clarify TablePropertiesCollector Status returns are mostly ignored
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9080
Test Plan: comments only (except WriteBufferManager final)
Reviewed By: ajkr
Differential Revision: D31968782
Pulled By: pdillinger
fbshipit-source-id: 11b648ce3ce3c5e5bdc02d2eafc7ea4b864bd1d2
Summary:
closes https://github.com/facebook/rocksdb/issues/5891
closes https://github.com/facebook/rocksdb/issues/2001
Java BytewiseComparator is now unsigned compliant, consistent with the default C++ comparator, which has always been thus. Consequently 2 tickets reporting the previous broken state can be closed.
This test confirms that the following issues were in fact resolved
by a change made between 6.2.2 and 6.22.1,
to wit https://github.com/facebook/rocksdb/commit/7242dae7
which as part of its effect, changed the Java bytewise comparators.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9019
Reviewed By: pdillinger
Differential Revision: D31610910
Pulled By: mrambacher
fbshipit-source-id: 664230f1377a1aa270136edd63eea2c206b907e9
Summary:
Note: it might conflict with another CRM related PR https://github.com/facebook/rocksdb/pull/9071 and so will merge after that's merged.
Context:
As `CacheReservationManager` being used by more memory users, it is convenient to retrieve the dummy entry size for `CacheReservationManager` instead of hard-coding `256 * 1024` in writing tests. Plus it allows more flexibility to change our implementation on dummy entry size.
A follow-up PR is needed to replace those hard-coded dummy entry size value in `db_test2.cc`, `db_write_buffer_manager_test.cc`, `write_buffer_manager_test.cc`, `table_test.cc` and the ones introduced in https://github.com/facebook/rocksdb/pull/9072#issue-1034326069.
- Exposed the private static constexpr `kDummyEntrySize` through public static `CacheReservationManager::GetDummyEntrySize()`
Pull Request resolved: https://github.com/facebook/rocksdb/pull/9072
Test Plan:
- Passing new tests
- Passing existing tests
Reviewed By: ajkr
Differential Revision: D32043684
Pulled By: hx235
fbshipit-source-id: ddefc6921c052adab6a2cda2394eb26da3076a50
Summary:
Right now, when options.ttl is set, compactions are triggered around the time when TTL is reached. This might cause extra compactions which are often bursty. This commit tries to mitigate it by picking those files earlier in normal compaction picking process. This is only implemented using kMinOverlappingRatio with Leveled compaction as it is the default value and it is more complicated to change other styles.
When a file is aged more than ttl/2, RocksDB starts to boost the compaction priority of files in normal compaction picking process, and hope by the time TTL is reached, very few extra compaction is needed.
In order for this to work, another change is made: during a compaction, if an output level file is older than ttl/2, cut output files based on original boundary (if it is not in the last level). This is to make sure that after an old file is moved to the next level, and new data is merged from the upper level, the new data falling into this range isn't reset with old timestamp. Without this change, in many cases, most files from one level will keep having old timestamp, even if they have newer data and we stuck in it.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8749
Test Plan: Add a unit test to test the boosting logic. Will add a unit test to test it end-to-end.
Reviewed By: jay-zhuang
Differential Revision: D30735261
fbshipit-source-id: 503c2d89250b22911eb99e72b379be154de3428e
Peter Dillinger