Summary:
In the past, we unnecessarily requires all keys in the same write batch
to be from column families whose timestamps' formats are the same for
simplicity. Specifically, we cannot use the same write batch to write to
two column families, one of which enables timestamp while the other
disables it.
The limitation is due to the member `timestamp_size_` that used to exist
in each `WriteBatch` object. We pass a timestamp_size to the constructor
of `WriteBatch`. Therefore, users can simply use the old
`WriteBatch::Put()`, `WriteBatch::Delete()`, etc APIs for write, while
the internal implementation of `WriteBatch` will take care of memory
allocation for timestamps.
The above is not necessary.
One the one hand, users can set up a memory buffer to store user key and
then contiguously append the timestamp to the user key. Then the user
can pass this buffer to the `WriteBatch::Put(Slice&)` API.
On the other hand, users can set up a SliceParts object which is an
array of Slices and let the last Slice to point to the memory buffer
storing timestamp. Then the user can pass the SliceParts object to the
`WriteBatch::Put(SliceParts&)` API.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8725
Test Plan: make check
Reviewed By: ltamasi
Differential Revision: D30654499
Pulled By: riversand963
fbshipit-source-id: 9d848c77ad3c9dd629aa5fc4e2bc16fb0687b4a2
Summary:
It's always annoying to find a header does not include its own
dependencies and only works when included after other includes. This
change adds `make check-headers` which validates that each header can
be included at the top of a file. Some headers are excluded e.g. because
of platform or external dependencies.
rocksdb_namespace.h had to be re-worked slightly to enable checking for
failure to include it. (ROCKSDB_NAMESPACE is a valid namespace name.)
Fixes mostly involve adding and cleaning up #includes, but for
FileTraceWriter, a constructor was out-of-lined to make a forward
declaration sufficient.
This check is not currently run with `make check` but is added to
CircleCI build-linux-unity since that one is already relatively fast.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8893
Test Plan: existing tests and resolving issues detected by new check
Reviewed By: mrambacher
Differential Revision: D30823300
Pulled By: pdillinger
fbshipit-source-id: 9fff223944994c83c105e2e6496d24845dc8e572
Summary:
Make the Statistics object into a Customizable object. Statistics can now be stored and created to/from the Options file.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8637
Reviewed By: zhichao-cao
Differential Revision: D30530550
Pulled By: mrambacher
fbshipit-source-id: 5fc7d01d8431f37b2c205bbbd8342c9f697023bd
Summary:
Context/Summary:
As users requested, a public API RateLimiter::GetTotalPendingRequests() is added to expose the total number of pending requests for bytes in the rate limiter, which is the size of the request queue of that priority (or of all priorities, if IO_TOTAL is interested) at the time when this API is called.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8890
Test Plan:
- Passing added new unit tests
- Passing existing unit tests
Reviewed By: ajkr
Differential Revision: D30815500
Pulled By: hx235
fbshipit-source-id: 2dfa990f651c1c47378b6215c751ad76a5824300
Summary:
ManagedObjects are shared pointer objects where RocksDB wants to share a single object between multiple configurations. For example, the Cache may be shared between multiple column families/tables or the Statistics may be shared between multiple databases.
ManagedObjects are stored in the ObjectRegistry by Type (e.g. Cache) and ID. For a given type/ID name, a single object is stored.
APIs were added to get/set/create these objects.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8658
Reviewed By: pdillinger
Differential Revision: D30806273
Pulled By: mrambacher
fbshipit-source-id: 832ac4423b210c4c4b4a456b35897334775d3160
Summary:
As a first step of supporting user-defined timestamps with ingestion, the
patch adds timestamp support to `SstFileWriter`; namely, it adds new
versions of the `Put` and `Delete` APIs that take timestamps. (`Merge`
and `DeleteRange` are currently not supported with user-defined timestamps
in general but once those features are implemented, we can handle them
in `SstFileWriter` in a similar fashion.) The new APIs validate the size of
the timestamp provided by the client. Similarly, calls to the pre-existing
timestamp-less APIs are now disallowed when user-defined timestamps are
in use according to the comparator.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8899
Test Plan: `make check`
Reviewed By: riversand963
Differential Revision: D30850699
Pulled By: ltamasi
fbshipit-source-id: 779154373618f19b8f0797976bb7286783c57b67
Summary:
Context/Summary: this PR is to clarify what the parameter new_memory_used is in CacheReservationManager::UpdateCacheReservation
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8895
Test Plan:
- Passing existing test
- Make format
Reviewed By: jay-zhuang
Differential Revision: D30844814
Pulled By: hx235
fbshipit-source-id: 3177f7abf5668ea9e73818ceaa355566f03acabc
Summary:
Support custom Env in these tests. Some custom Envs do not support reopening a file for write, either normal mode or Random RW mode. Added some additional checks in external_sst_file_basic_test to accommodate those Envs.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8888
Reviewed By: riversand963
Differential Revision: D30824481
Pulled By: anand1976
fbshipit-source-id: c3ac7a628e6df29e94f42e370e679934a4f77eac
Summary:
Context:
While all the non-trivial write operations in BackupEngine go through the RateLimiter, reads currently do not. In general, this is not a huge issue because (especially since some I/O efficiency fixes) reads in BackupEngine are mostly limited by corresponding writes, for both backup and restore. But in principle we should charge the RateLimiter for reads as well.
- Charged read operations in `BackupEngineImpl::CopyOrCreateFile`, `BackupEngineImpl::ReadFileAndComputeChecksum`, `BackupEngineImpl::BackupMeta::LoadFromFile` and `BackupEngineImpl::GetFileDbIdentities`
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8722
Test Plan:
- Passed existing tests
- Passed added unit tests
Reviewed By: pdillinger
Differential Revision: D30610464
Pulled By: hx235
fbshipit-source-id: 9b08c9387159a5385c8d390d6666377a0d0117e5
Summary:
A "LATEST_BACKUP" file was left in the backup directory by
"BackupEngineTest.NoDeleteWithReadOnly" test, affecting future test
runs. In particular, it caused "BackupEngineTest.IOStats" to fail since
it relies on backup directory containing only data written by its
`BackupEngine`.
The fix is to promote "LATEST_BACKUP" to an explicitly managed file so
it is deleted in `BackupEngineTest` constructor if it exists.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8887
Test Plan:
below command used to fail. Now it passes:
```
$ TEST_TMPDIR=/dev/shm ./backupable_db_test --gtest_filter='BackupEngineTest.NoDeleteWithReadOnly:BackupEngineTest.IOStats'
```
Reviewed By: pdillinger
Differential Revision: D30812336
Pulled By: ajkr
fbshipit-source-id: 32dfbe1368ebdab872e610764bfea5daf9a2af09
Summary:
Context:
Some data blocks are temporarily buffered in memory in BlockBasedTableBuilder for building compression dictionary used in data block compression. Currently this memory usage is not counted toward our global memory usage utilizing block cache capacity. To improve that, this PR charges that memory usage into the block cache to achieve better memory tracking and limiting.
- Reserve memory in block cache for buffered data blocks that are used to build a compression dictionary
- Release all the memory associated with buffering the data blocks mentioned above in EnterUnbuffered(), which is called when (a) buffer limit is exceeded after buffering OR (b) the block cache becomes full after reservation OR (c) BlockBasedTableBuilder calls Finish()
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8428
Test Plan:
- Passing existing unit tests
- Passing new unit tests
Reviewed By: ajkr
Differential Revision: D30755305
Pulled By: hx235
fbshipit-source-id: 6e66665020b775154a94c4c5e0f2adaeaff13981
Summary:
RocksDB exposes certain internal statistics via the DB property interface.
However, there are currently no properties related to BlobDB.
For starters, we would like to add the following BlobDB properties:
`rocksdb.num-blob-files`: number of blob files in the current Version (kind of like `num-files-at-level` but note this is not per level, since blob files are not part of the LSM tree).
`rocksdb.blob-stats`: this could return the total number and size of all blob files, and potentially also the total amount of garbage (in bytes) in the blob files in the current Version.
`rocksdb.total-blob-file-size`: the total size of all blob files (as a blob counterpart for `total-sst-file-size`) of all Versions.
`rocksdb.live-blob-file-size`: the total size of all blob files in the current Version.
`rocksdb.estimate-live-data-size`: this is actually an existing property that we can extend so it considers blob files as well. When it comes to blobs, we actually have an exact value for live bytes. Namely, live bytes can be computed simply as total bytes minus garbage bytes, summed over the entire set of blob files in the Version.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8734
Test Plan:
```
➜ rocksdb git:(new_feature_blobDB_properties) ./db_blob_basic_test
[==========] Running 16 tests from 2 test cases.
[----------] Global test environment set-up.
[----------] 10 tests from DBBlobBasicTest
[ RUN ] DBBlobBasicTest.GetBlob
[ OK ] DBBlobBasicTest.GetBlob (12 ms)
[ RUN ] DBBlobBasicTest.MultiGetBlobs
[ OK ] DBBlobBasicTest.MultiGetBlobs (11 ms)
[ RUN ] DBBlobBasicTest.GetBlob_CorruptIndex
[ OK ] DBBlobBasicTest.GetBlob_CorruptIndex (10 ms)
[ RUN ] DBBlobBasicTest.GetBlob_InlinedTTLIndex
[ OK ] DBBlobBasicTest.GetBlob_InlinedTTLIndex (12 ms)
[ RUN ] DBBlobBasicTest.GetBlob_IndexWithInvalidFileNumber
[ OK ] DBBlobBasicTest.GetBlob_IndexWithInvalidFileNumber (9 ms)
[ RUN ] DBBlobBasicTest.GenerateIOTracing
[ OK ] DBBlobBasicTest.GenerateIOTracing (11 ms)
[ RUN ] DBBlobBasicTest.BestEffortsRecovery_MissingNewestBlobFile
[ OK ] DBBlobBasicTest.BestEffortsRecovery_MissingNewestBlobFile (13 ms)
[ RUN ] DBBlobBasicTest.GetMergeBlobWithPut
[ OK ] DBBlobBasicTest.GetMergeBlobWithPut (11 ms)
[ RUN ] DBBlobBasicTest.MultiGetMergeBlobWithPut
[ OK ] DBBlobBasicTest.MultiGetMergeBlobWithPut (14 ms)
[ RUN ] DBBlobBasicTest.BlobDBProperties
[ OK ] DBBlobBasicTest.BlobDBProperties (21 ms)
[----------] 10 tests from DBBlobBasicTest (124 ms total)
[----------] 6 tests from DBBlobBasicTest/DBBlobBasicIOErrorTest
[ RUN ] DBBlobBasicTest/DBBlobBasicIOErrorTest.GetBlob_IOError/0
[ OK ] DBBlobBasicTest/DBBlobBasicIOErrorTest.GetBlob_IOError/0 (12 ms)
[ RUN ] DBBlobBasicTest/DBBlobBasicIOErrorTest.GetBlob_IOError/1
[ OK ] DBBlobBasicTest/DBBlobBasicIOErrorTest.GetBlob_IOError/1 (10 ms)
[ RUN ] DBBlobBasicTest/DBBlobBasicIOErrorTest.MultiGetBlobs_IOError/0
[ OK ] DBBlobBasicTest/DBBlobBasicIOErrorTest.MultiGetBlobs_IOError/0 (10 ms)
[ RUN ] DBBlobBasicTest/DBBlobBasicIOErrorTest.MultiGetBlobs_IOError/1
[ OK ] DBBlobBasicTest/DBBlobBasicIOErrorTest.MultiGetBlobs_IOError/1 (10 ms)
[ RUN ] DBBlobBasicTest/DBBlobBasicIOErrorTest.CompactionFilterReadBlob_IOError/0
[ OK ] DBBlobBasicTest/DBBlobBasicIOErrorTest.CompactionFilterReadBlob_IOError/0 (1011 ms)
[ RUN ] DBBlobBasicTest/DBBlobBasicIOErrorTest.CompactionFilterReadBlob_IOError/1
[ OK ] DBBlobBasicTest/DBBlobBasicIOErrorTest.CompactionFilterReadBlob_IOError/1 (1013 ms)
[----------] 6 tests from DBBlobBasicTest/DBBlobBasicIOErrorTest (2066 ms total)
[----------] Global test environment tear-down
[==========] 16 tests from 2 test cases ran. (2190 ms total)
[ PASSED ] 16 tests.
```
Reviewed By: ltamasi
Differential Revision: D30690849
Pulled By: Zhiyi-Zhang
fbshipit-source-id: a7567319487ad76bd1a2e24bf143afdbbd9e4346
Summary:
This PR does the following:
-> Makes the MemTableRepFactory into a Customizable class and creatable/configurable via CreateFromString
-> Makes the existing implementations compatible with configurations
-> Moves the "SpecialRepFactory" test class into testutil, accessible via the ObjectRegistry or a NewSpecial API
New tests were added to validate the functionality and all existing tests pass. db_bench and memtablerep_bench were hand-tested to verify the functionality in those tools.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8419
Reviewed By: zhichao-cao
Differential Revision: D29558961
Pulled By: mrambacher
fbshipit-source-id: 81b7229636e4e649a0c914e73ac7b0f8454c931c
Summary:
Failure to create the lock file (e.g. out of space) could
prevent future LockFile attempts in the same process on the same file
from succeeding.
Also added DEBUG code to fail assertion if PosixFileLock is destroyed
without using UnlockFile (which is a risk because FileLock is in the
public API with virtual destructor).
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8747
Test Plan: test added
Reviewed By: ajkr
Differential Revision: D30732543
Pulled By: pdillinger
fbshipit-source-id: 4c30a959566d91f778d6fad3fbbd5f3941b097c1
Summary:
* Don't hardcode namespace rocksdb (use ROCKSDB_NAMESPACE)
* Don't #include <rocksdb/...> (use double quotes)
* Support putting NOCOMMIT (any case) in source code that should not be
committed/pushed in current state.
These will be run with `make check` and in GitHub actions
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8821
Test Plan: existing tests, manually try out new checks
Reviewed By: zhichao-cao
Differential Revision: D30791726
Pulled By: pdillinger
fbshipit-source-id: 399c883f312be24d9e55c58951d4013e18429d92
Summary:
Gets `Statistics` from the options associated with the `DB` undergoing backup, and populates new ticker stats with the thread-local `IOContext` read/write counters for the threads doing backup work.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8819
Reviewed By: pdillinger
Differential Revision: D30779238
Pulled By: ajkr
fbshipit-source-id: 75ccafc355f90906df5cf80367f7245b985772d8
Summary:
asan_symbolize.py is not compatible with python3. Also make it
consistent with public CI, which doesn't use asan_symbolize.py
And update coverage_test.sh to use python3.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8737
Test Plan: CI
Reviewed By: pdillinger
Differential Revision: D30702430
Pulled By: jay-zhuang
fbshipit-source-id: ef09947b1232294d31b09a855c2f0ce149097dd9
Summary:
- Clarified some comments on compatibility for adding new ticker stats
- Added read I/O stats for `VerifyChecksum()` and `VerifyFileChecksums()` APIs
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8741
Test Plan: new unit test
Reviewed By: zhichao-cao
Differential Revision: D30708578
Pulled By: ajkr
fbshipit-source-id: d06b961f7e199ae92c266b683e39870aa8f63449
Summary:
* Consolidate use of std::regex for testing to testharness.cc, to
minimize Facebook linters constantly flagging uses in non-production
code.
* Improve syntax and error messages for asserting some string matches a
regex in tests.
* Add a public Regex wrapper class to encapsulate existing usage in
ObjectRegistry.
* Remove unnecessary include <regex>
* Put warnings that use of Regex in production code could cause bad
performance or stack overflow.
Intended follow-up work:
* Replace std::regex with another underlying implementation like RE2
* Improve ObjectRegistry interface in terms of possibly confusing literal
string matching vs. regex and in terms of reporting invalid regex.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8740
Test Plan:
tests updated, basic unit test for public Regex, and some manual
testing of temporary changes to see example error messages:
utilities/backupable/backupable_db_test.cc:917: Failure
000010_1162373755_138626.blob (child.name)
does not match regex
[0-9]+_[0-9]+_[0-9]+[.]blobHAHAHA (pattern)
db/db_basic_test.cc:74: Failure
R3SHSBA8C4U0CIMV2ZB0 (sid3)
does not match regex [0-9A-Z]{20}HAHAHA
Reviewed By: mrambacher
Differential Revision: D30706246
Pulled By: pdillinger
fbshipit-source-id: ba845e8f563ccad39bdb58f44f04e9da8f78c3fd
Summary:
Old typedef syntax is confusing
Most but not all changes with
perl -pi -e 's/typedef (.*) ([a-zA-Z0-9_]+);/using $2 = $1;/g' list_of_files
make format
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8751
Test Plan: existing
Reviewed By: zhichao-cao
Differential Revision: D30745277
Pulled By: pdillinger
fbshipit-source-id: 6f65f0631c3563382d43347896020413cc2366d9
Summary:
Regression test is broken and not running:
1. failed test is not reporting, fix it by add `set -e`
2. internal regression test is not run inside github, removing that
3. fix a few minor issues to pass the test
4. delete unused binary size build, and regression test is reporting binary size now.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8753
Test Plan: CI: https://www.internalfb.com/intern/sandcastle/job/13510799359573861
Reviewed By: ltamasi
Differential Revision: D30754380
Pulled By: jay-zhuang
fbshipit-source-id: 0cfa008327fff31bc61118a3fe642924090d28e1
Summary:
Update branch name from master to main in docs/*
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8743
Reviewed By: ltamasi
Differential Revision: D30712263
Pulled By: akankshamahajan15
fbshipit-source-id: a1a5e20d95210e792705030f98dd2b38ca542eb5
Summary:
While we're at it, also update the links to Travis (.org to .com).
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8727
Reviewed By: jay-zhuang
Differential Revision: D30675223
Pulled By: ltamasi
fbshipit-source-id: ce4b04a72e56ad35b6bddb982cca41fa8ceacf84
Summary:
* FullKey and ParseFullKey appear to serve no purpose in the public API
(or anything else) so removed. Only use in one test updated.
* NumberToString serves no purpose vs. ToString so removed, numerous
calls updated
* Remove unnecessary forward declarations in metadata.h by re-arranging
class definitions.
* Remove some unneeded semicolons
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8736
Test Plan: existing tests
Reviewed By: mrambacher
Differential Revision: D30700039
Pulled By: pdillinger
fbshipit-source-id: 1e436a576f511a6ed8b4d97af7cc8216bc729af2
Summary:
If RateLimiter burst bytes changes during concurrent Restore
operations
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8732
Test Plan: updated unit test fails with TSAN before change, passes after
Reviewed By: ajkr
Differential Revision: D30683879
Pulled By: pdillinger
fbshipit-source-id: d0ddb3587ade91ee2a4d926b475acf7781b03086
Summary:
Required for platform009, which is incompat with the centos
assembler.
author: pbrady@fb.com D29099768
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8733
Test Plan: CI
Reviewed By: pixelb
Differential Revision: D30687156
Pulled By: jay-zhuang
fbshipit-source-id: 796f90842cbf0ca11bad07e7d654bce1fafc4ba0
Summary:
Context:
An extra IO_USER priority in rate limiter allows users to optionally charge WAL writes / SST reads to rate limiter at this priority level, which then has higher priority than IO_HIGH and IO_LOW. With an extra IO_USER priority, it allows users to better specify the relative urgency/importance among different requests in rate limiter. As a consequence, IO resource management can better prioritize and limit resource based on user's need.
The IO_USER is implemented as superior priority in GenericRateLimiter, in the sense that its request queue will always be iterated first without being constrained to fairness. The reason is that the notion of fairness is only meaningful in helping lower priorities in background IO (i.e, IO_HIGH/MID/LOW) to gain some fair chance to run so that it does not block foreground IO (i.e, the ones that are charged at the level of IO_USER). As we can see, the ultimate goal here is to not blocking foreground IO at IO_USER level, which justifies the superiority of IO_USER.
Similar benefits exist for IO_MID priority.
- Rewrote the logic of deciding the order of iterating request queues of high/low priorities to include the extra user/mid priority w/o affecting the existing behavior (see PR's [comment](https://github.com/facebook/rocksdb/pull/8595/files#r678749331))
- Included the request queue of user-pri/mid-pri in the code path of next-leader-candidate signaling and GenericRateLimiter's destructor
- Included the extra user/mid-pri in bookkeeping data structures: total_bytes_through_ and total_requests_
- Re-written the previous impl of explicitly iterating priorities with a loop from Env::IO_LOW to Env::IO_TOTAL
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8595
Test Plan:
- passed existing rate_limiter_test.cc
- passed added unit tests in rate_limiter_test.cc
- run performance test to verify performance with only high/low requests is not affected by this change
- Set-up command:
`TEST_TMPDIR=/dev/shm ./db_bench --benchmarks=fillrandom --duration=5 --compression_type=none --num=100000000 --disable_auto_compactions=true --write_buffer_size=1048576 --writable_file_max_buffer_size=65536 --target_file_size_base=1048576 --max_bytes_for_level_base=4194304 --level0_slowdown_writes_trigger=$(((1 << 31) - 1)) --level0_stop_writes_trigger=$(((1 << 31) - 1))`
- Test command:
`TEST_TMPDIR=/dev/shm ./db_bench --benchmarks=overwrite --use_existing_db=true --disable_wal=true --duration=30 --compression_type=none --num=100000000 --write_buffer_size=1048576 --writable_file_max_buffer_size=65536 --target_file_size_base=1048576 --max_bytes_for_level_base=4194304 --level0_slowdown_writes_trigger=$(((1 << 31) - 1)) --level0_stop_writes_trigger=$(((1 << 31) - 1)) --statistics=true --rate_limiter_bytes_per_sec=1048576 --rate_limiter_refill_period_us=1000 --threads=32 |& grep -E '(flush|compact)\.write\.bytes'`
- Before (on branch upstream/master):
`rocksdb.compact.write.bytes COUNT : 4014162`
`rocksdb.flush.write.bytes COUNT : 26715832`
rocksdb.flush.write.bytes/rocksdb.compact.write.bytes ~= 6.66
- After (on branch rate_limiter_user_pri):
`rocksdb.compact.write.bytes COUNT : 3807822`
`rocksdb.flush.write.bytes COUNT : 26098659`
rocksdb.flush.write.bytes/rocksdb.compact.write.bytes ~= 6.85
Reviewed By: ajkr
Differential Revision: D30577783
Pulled By: hx235
fbshipit-source-id: 0881f2705ffd13ecd331256bde7e8ec874a353f4
Summary:
All/most trace related APIs directly use `SystemClock*` (https://github.com/facebook/rocksdb/pull/8033). Do the same in `TraceExecutionHandler`.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8729
Test Plan: None
Reviewed By: zhichao-cao
Differential Revision: D30672159
Pulled By: autopear
fbshipit-source-id: 017db4912c6ac1cfede842b8b122cf569a394f25
Summary:
In ```LRUCacheShard::Promote```, a reference is released outside the LRU mutex. Fix the race condition.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8717
Reviewed By: zhichao-cao
Differential Revision: D30649206
Pulled By: anand1976
fbshipit-source-id: 09c0af05b2294a7fe2c02876a61b0bad6e3ada61
Summary:
Env::GenerateUniqueId() works fine on Windows and on POSIX
where /proc/sys/kernel/random/uuid exists. Our other implementation is
flawed and easily produces collision in a new multi-threaded test.
As we rely more heavily on DB session ID uniqueness, this becomes a
serious issue.
This change combines several individually suitable entropy sources
for reliable generation of random unique IDs, with goal of uniqueness
and portability, not cryptographic strength nor maximum speed.
Specifically:
* Moves code for getting UUIDs from the OS to port::GenerateRfcUuid
rather than in Env implementation details. Callers are now told whether
the operation fails or succeeds.
* Adds an internal API GenerateRawUniqueId for generating high-quality
128-bit unique identifiers, by combining entropy from three "tracks":
* Lots of info from default Env like time, process id, and hostname.
* std::random_device
* port::GenerateRfcUuid (when working)
* Built-in implementations of Env::GenerateUniqueId() will now always
produce an RFC 4122 UUID string, either from platform-specific API or
by converting the output of GenerateRawUniqueId.
DB session IDs now use GenerateRawUniqueId while DB IDs (not as
critical) try to use port::GenerateRfcUuid but fall back on
GenerateRawUniqueId with conversion to an RFC 4122 UUID.
GenerateRawUniqueId is declared and defined under env/ rather than util/
or even port/ because of the Env dependency.
Likely follow-up: enhance GenerateRawUniqueId to be faster after the
first call and to guarantee uniqueness within the lifetime of a single
process (imparting the same property onto DB session IDs).
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8708
Test Plan:
A new mini-stress test in env_test checks the various public
and internal APIs for uniqueness, including each track of
GenerateRawUniqueId individually. We can't hope to verify anywhere close
to 128 bits of entropy, but it can at least detect flaws as bad as the
old code. Serial execution of the new tests takes about 350 ms on
my machine.
Reviewed By: zhichao-cao, mrambacher
Differential Revision: D30563780
Pulled By: pdillinger
fbshipit-source-id: de4c9ff4b2f581cf784fcedb5f39f16e5185c364
Summary:
Introduce a new function to save sst files.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8706
Reviewed By: jay-zhuang
Differential Revision: D30544242
Pulled By: riversand963
fbshipit-source-id: 554755852daff7ae1c7864b0029f51b27099ee09
Summary:
DumpStats() iterates through the ColumnFamilySet. There is a potential
race condition because it does Ref the cfd, and the cfd could get
destroyed during the iteration.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/8714
Test Plan: make check
Reviewed By: ltamasi
Differential Revision: D30580199
Pulled By: anand1976
fbshipit-source-id: 60a3443ad0d4f7ac6a977dec780e6d2c1b70b850
Yanqin Jin