Summary:
Create C API function for iterating over WriteBatch for custom Column Families
Adding function to C API that exposes column family specific methods to iterate over WriteBatch: put_cf, delete_cf and merge_cf. This is required when the one needs to read changes for any non-default column family. Without that functionality it is impossible to iterate over changes in WAL that are relevant to custom column families.
Fixes https://github.com/facebook/rocksdb/issues/12790
Testing:
Added WriteBatch iteration test to "columnfamilies" section of C API unit tests
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12718
Reviewed By: cbi42
Differential Revision: D59483601
Pulled By: ajkr
fbshipit-source-id: b68b900636304528a38620a8c3ad82fdce4b60cb
Summary:
I'd like to get this in so the Rust folks can integrate with their splendid logging/tracing frameworks; will be hugely appreciated. 🙏🏻
The infolog capabilities for C embeddings are quite spartan. LOG files were generated involuntarily until redirection to stderr was added by https://github.com/facebook/rocksdb/issues/12262; still insufficient for apps which cannot tolerate pollution of their stdio and tend to have existing logging frameworks to tie into for that.
Adds a very minimal derive of Logger around a C callback, written in the spirit, useful for FFI interfaces from other languages to integrate infolog.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12537
Reviewed By: ajkr
Differential Revision: D57597766
Pulled By: cbi42
fbshipit-source-id: ec684ce4ddf77a0a6ebbf013a1bacb4ff2e49eb0
Summary:
This option is recommended to be set for production use:
We recommend to set track_and_verify_wals_in_manifest to true
for production
https://github.com/facebook/rocksdb/wiki/Track-WAL-in-MANIFEST
This adds this setting to the C API, so it can be used by other languages.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12749
Reviewed By: ltamasi
Differential Revision: D58382892
Pulled By: ajkr
fbshipit-source-id: 885de4539745a3119b6b2a162ab4fca9fa975283
Summary:
The write_dbid_to_manifest option is documented as "We recommend setting this flag to true". However, there is no way to set this flag from the C API.
Add the following functions to the C API:
* rocksdb_get_db_identity
* rocksdb_options_get_write_dbid_to_manifest
* rocksdb_options_set_write_dbid_to_manifest
Add a test that this option preserves the ID across checkpoints.
c.cc:
* Remove outdated comments about missing C API functions that exist.
* Document that CopyString is intended for binary data and is not NUL terminated.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12736
Reviewed By: ltamasi
Differential Revision: D58202117
Pulled By: ajkr
fbshipit-source-id: 707b110df5c4bd118d65548327428a53a9dc3019
Summary:
rocksdb_batched_multi_get_cf has performance improvement than normal multi_get, however it needs a cf_handle arg, so add a C-API to get and destroy the default cf_handle, as many user only use the default cf.
Fixes https://github.com/facebook/rocksdb/issues/12316
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12514
Reviewed By: hx235
Differential Revision: D55922517
Pulled By: ajkr
fbshipit-source-id: c4cc4289f2cfd9efbb8f390a44a9d8d1ed08d9f0
Summary:
This PR adds UpdateTimestamp API of WriteBatch and WBWI, create WB, WBWI with all options and Iterator Refresh in C API
Pull Request resolved: https://github.com/facebook/rocksdb/pull/10529
Reviewed By: cbi42
Differential Revision: D57826913
Pulled By: ajkr
fbshipit-source-id: d2ec840129f61a1d3a5a12e859728be98ebbad2f
Summary:
When internal cpp modernizer attempts to format rocksdb code, it will replace macro `ROCKSDB_NAMESPACE` with its default definition `rocksdb` when collapsing nested namespace. We filed a feedback for the tool T180254030 and the team filed a bug for this: https://github.com/llvm/llvm-project/issues/83452. At the same time, they suggested us to run the modernizer tool ourselves so future auto codemod attempts will be smaller. This diff contains:
Running
`xplat/scripts/codemod_service/cpp_modernizer.sh`
in fbcode/internal_repo_rocksdb/repo (excluding some directories in utilities/transactions/lock/range/range_tree/lib that has a non meta copyright comment)
without swapping out the namespace macro `ROCKSDB_NAMESPACE`
Followed by RocksDB's own
`make format`
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12398
Test Plan: Auto tests
Reviewed By: hx235
Differential Revision: D54382532
Pulled By: jowlyzhang
fbshipit-source-id: e7d5b40f9b113b60e5a503558c181f080b9d02fa
Summary:
There is no strong reason for user to need this mode while on the other hand, its behavior is destructive.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12337
Reviewed By: hx235
Differential Revision: D53630393
Pulled By: jowlyzhang
fbshipit-source-id: ce94b537258102cd98f89aa4090025663664dd78
Summary:
In C++, `extern` is redundant in a number of cases:
* "Global" function declarations and definitions
* "Global" variable definitions when already declared `extern`
For consistency and simplicity, I've removed these in code that *we own*. In a couple of cases, I removed obsolete declarations, and for MagicNumber constants, I have consolidated the declarations into a header file (format.h)
as standard best practice would prescribe.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12300
Test Plan: no functional changes, CI
Reviewed By: ajkr
Differential Revision: D53148629
Pulled By: pdillinger
fbshipit-source-id: fb8d927959892e03af09b0c0d542b0a3b38fd886
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:
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:
Add a bunch of C API functions to expose new `WaitForCompact` function and related options.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11737
Test Plan: unit tests
Reviewed By: jaykorean
Differential Revision: D48568239
Pulled By: abulimov
fbshipit-source-id: 1ff35972d7abacd7e1e17fe2ada1e20cdc88d8de
Summary:
Adds a few missing features to the C API:
1) Statistics level
2) Getting individual values instead of a serialized string
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11263
Test Plan: unit tests
Reviewed By: ajkr
Differential Revision: D47309963
Pulled By: hx235
fbshipit-source-id: 84df59db4045fc0fb3ea4aec451bc5c2afd2a248
Summary:
Add `rocksdb_transactiondb_get_base_db` and `rocksdb_transactiondb_close_base_db` functions to the C API modeled after `rocksdb_optimistictransactiondb_get_base_db` and `rocksdb_optimistictransactiondb_close_base_db`:
ca50ccc71a/include/rocksdb/c.h (L2711-L2716)
With this pair of functions, it is possible to get a `rocksdb_t *` from a `rocksdb_transactiondb_t *`. The main goal is to be able to use the approximate memory usage API, only accessible to the `rocksdb_t *` type:
ca50ccc71a/include/rocksdb/c.h (L2821-L2833)
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11562
Reviewed By: ajkr
Differential Revision: D47603343
Pulled By: jowlyzhang
fbshipit-source-id: c70cf6af5834026e232fe7791634db3a396f7d5e
Summary:
https://github.com/facebook/rocksdb/issues/11542 added a parameter to the C API `rocksdb_options_add_compact_on_deletion_collector_factory` which causes some internal builds to fail. External users using this API would also require code change. Making the API backward compatible by restoring the old C API and add the parameter to a new C API `rocksdb_options_add_compact_on_deletion_collector_factory_del_ratio`.
Also updated change log for 8.4 and will backport this change to 8.4 branch once landed.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11593
Test Plan: `make c_test && ./c_test`
Reviewed By: akankshamahajan15
Differential Revision: D47299555
Pulled By: cbi42
fbshipit-source-id: 517dc093ef4cf02cac2fe4af4f1af13754bbda63
Summary:
Expose the remaining fields of PlainTableOptions as arguments to `rocksdb_options_set_plain_table_factory` in the C API.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11442
Reviewed By: ajkr
Differential Revision: D46786962
Pulled By: hx235
fbshipit-source-id: 8862083dde332bfecc5ff02f9375776ad35c11f5
Summary:
The class `NewCompactOnDeletionCollectorFactory` exposes the parameter `delete_ratio`.
The C API `rocksdb_options_add_compact_on_deletion_collector_factory` does not allow a user to pass a delete ration to be passed down the the C++ class bellow.
The class has default value for the delete ratio which makes it pass the compilation and the tests.
closes https://github.com/facebook/rocksdb/issues/11541
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11542
Reviewed By: ajkr
Differential Revision: D46770908
Pulled By: cbi42
fbshipit-source-id: 7b5162fe459896052e392e2d85a8f6c01db3b464
Summary:
Makes it easier to use generated Rust bindings. Constness of these is already part of the C++ API.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11243
Reviewed By: hx235
Differential Revision: D44840394
Pulled By: ajkr
fbshipit-source-id: bcd1aeb8c959c304148d25b00043bb8c4cd3e0a4
Summary:
This PR adds support to the c-api bindings for calling `Flush()` with multiple column families, which is useful for performing atomic flushes (assuming also that the db has been opened with `atomic_flush = true`).
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11112
Reviewed By: cbi42
Differential Revision: D42666382
Pulled By: ajkr
fbshipit-source-id: 82f05bf32d28452d85c79ea42411c8fea961fd87
Summary:
The definition of the Cache class should not be needed by the vast majority of RocksDB users, so I think it is just distracting to include it in cache.h, which is primarily needed for configuring and creating caches. This change moves the class to a new header advanced_cache.h. It is just cut-and-paste except for modifying the class API comment.
In general, operations on shared_ptr<Cache> should continue to work when only a forward declaration of Cache is available, as long as all the Cache instances provided are already shared_ptr. See https://stackoverflow.com/a/17650101/454544
Also, the most common way to customize a Cache is by wrapping an existing implementation, so it makes sense to provide CacheWrapper in the public API. This was a cut-and-paste job except removing the implementation of Name() so that derived classes must provide it.
Intended follow-up: consolidate Release() into one function to reduce customization bugs / confusion
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11192
Test Plan: `make check`
Reviewed By: anand1976
Differential Revision: D43055487
Pulled By: pdillinger
fbshipit-source-id: 7b05492df35e0f30b581b4c24c579bc275b6d110
Summary:
We haven't been actively mantaining RocksDB LITE recently and the size must have been gone up significantly. We are removing the support.
Most of changes were done through following comments:
unifdef -m -UROCKSDB_LITE `git grep -l ROCKSDB_LITE | egrep '[.](cc|h)'`
by Peter Dillinger. Others changes were manually applied to build scripts, CircleCI manifests, ROCKSDB_LITE is used in an expression and file db_stress_test_base.cc.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11147
Test Plan: See CI
Reviewed By: pdillinger
Differential Revision: D42796341
fbshipit-source-id: 4920e15fc2060c2cd2221330a6d0e5e65d4b7fe2
Summary:
Compressed block cache is replaced by compressed secondary cache. Remove the feature.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11117
Test Plan: See CI passes
Reviewed By: pdillinger
Differential Revision: D42700164
fbshipit-source-id: 6cbb24e460da29311150865f60ecb98637f9f67d
Summary:
Ran `find ./db/ -type f | xargs clang-format -i`. Excluded minor changes it tried to make on db/db_impl/. Everything else it changed was directly under db/ directory. Included minor manual touchups mentioned in PR commit history.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/10910
Reviewed By: riversand963
Differential Revision: D40880683
Pulled By: ajkr
fbshipit-source-id: cfe26cda05b3fb9a72e3cb82c286e21d8c5c4174
Summary:
Delete range logic is moved from `DBIter` to `MergingIterator`, and `MergingIterator` will seek to the end of a range deletion if possible instead of scanning through each key and check with `RangeDelAggregator`.
With the invariant that a key in level L (consider memtable as the first level, each immutable and L0 as a separate level) has a larger sequence number than all keys in any level >L, a range tombstone `[start, end)` from level L covers all keys in its range in any level >L. This property motivates optimizations in iterator:
- in `Seek(target)`, if level L has a range tombstone `[start, end)` that covers `target.UserKey`, then for all levels > L, we can do Seek() on `end` instead of `target` to skip some range tombstone covered keys.
- in `Next()/Prev()`, if the current key is covered by a range tombstone `[start, end)` from level L, we can do `Seek` to `end` for all levels > L.
This PR implements the above optimizations in `MergingIterator`. As all range tombstone covered keys are now skipped in `MergingIterator`, the range tombstone logic is removed from `DBIter`. The idea in this PR is similar to https://github.com/facebook/rocksdb/issues/7317, but this PR leaves `InternalIterator` interface mostly unchanged. **Credit**: the cascading seek optimization and the sentinel key (discussed below) are inspired by [Pebble](https://github.com/cockroachdb/pebble/blob/master/merging_iter.go) and suggested by ajkr in https://github.com/facebook/rocksdb/issues/7317. The two optimizations are mostly implemented in `SeekImpl()/SeekForPrevImpl()` and `IsNextDeleted()/IsPrevDeleted()` in `merging_iterator.cc`. See comments for each method for more detail.
One notable change is that the minHeap/maxHeap used by `MergingIterator` now contains range tombstone end keys besides point key iterators. This helps to reduce the number of key comparisons. For example, for a range tombstone `[start, end)`, a `start` and an `end` `HeapItem` are inserted into the heap. When a `HeapItem` for range tombstone start key is popped from the minHeap, we know this range tombstone becomes "active" in the sense that, before the range tombstone's end key is popped from the minHeap, all the keys popped from this heap is covered by the range tombstone's internal key range `[start, end)`.
Another major change, *delete range sentinel key*, is made to `LevelIterator`. Before this PR, when all point keys in an SST file are iterated through in `MergingIterator`, a level iterator would advance to the next SST file in its level. In the case when an SST file has a range tombstone that covers keys beyond the SST file's last point key, advancing to the next SST file would lose this range tombstone. Consequently, `MergingIterator` could return keys that should have been deleted by some range tombstone. We prevent this by pretending that file boundaries in each SST file are sentinel keys. A `LevelIterator` now only advance the file iterator once the sentinel key is processed.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/10449
Test Plan:
- Added many unit tests in db_range_del_test
- Stress test: `./db_stress --readpercent=5 --prefixpercent=19 --writepercent=20 -delpercent=10 --iterpercent=44 --delrangepercent=2`
- Additional iterator stress test is added to verify against iterators against expected state: https://github.com/facebook/rocksdb/issues/10538. This is based on ajkr's previous attempt https://github.com/facebook/rocksdb/pull/5506#issuecomment-506021913.
```
python3 ./tools/db_crashtest.py blackbox --simple --write_buffer_size=524288 --target_file_size_base=524288 --max_bytes_for_level_base=2097152 --compression_type=none --max_background_compactions=8 --value_size_mult=33 --max_key=5000000 --interval=10 --duration=7200 --delrangepercent=3 --delpercent=9 --iterpercent=25 --writepercent=60 --readpercent=3 --prefixpercent=0 --num_iterations=1000 --range_deletion_width=100 --verify_iterator_with_expected_state_one_in=1
```
- Performance benchmark: I used a similar setup as in the blog [post](http://rocksdb.org/blog/2018/11/21/delete-range.html) that introduced DeleteRange, "a database with 5 million data keys, and 10000 range tombstones (ignoring those dropped during compaction) that were written in regular intervals after 4.5 million data keys were written". As expected, the performance with this PR depends on the range tombstone width.
```
# Setup:
TEST_TMPDIR=/dev/shm ./db_bench_main --benchmarks=fillrandom --writes=4500000 --num=5000000
TEST_TMPDIR=/dev/shm ./db_bench_main --benchmarks=overwrite --writes=500000 --num=5000000 --use_existing_db=true --writes_per_range_tombstone=50
# Scan entire DB
TEST_TMPDIR=/dev/shm ./db_bench_main --benchmarks=readseq[-X5] --use_existing_db=true --num=5000000 --disable_auto_compactions=true
# Short range scan (10 Next())
TEST_TMPDIR=/dev/shm/width-100/ ./db_bench_main --benchmarks=seekrandom[-X5] --use_existing_db=true --num=500000 --reads=100000 --seek_nexts=10 --disable_auto_compactions=true
# Long range scan(1000 Next())
TEST_TMPDIR=/dev/shm/width-100/ ./db_bench_main --benchmarks=seekrandom[-X5] --use_existing_db=true --num=500000 --reads=2500 --seek_nexts=1000 --disable_auto_compactions=true
```
Avg over of 10 runs (some slower tests had fews runs):
For the first column (tombstone), 0 means no range tombstone, 100-10000 means width of the 10k range tombstones, and 1 means there is a single range tombstone in the entire DB (width is 1000). The 1 tombstone case is to test regression when there's very few range tombstones in the DB, as no range tombstone is likely to take a different code path than with range tombstones.
- Scan entire DB
| tombstone width | Pre-PR ops/sec | Post-PR ops/sec | ±% |
| ------------- | ------------- | ------------- | ------------- |
| 0 range tombstone |2525600 (± 43564) |2486917 (± 33698) |-1.53% |
| 100 |1853835 (± 24736) |2073884 (± 32176) |+11.87% |
| 1000 |422415 (± 7466) |1115801 (± 22781) |+164.15% |
| 10000 |22384 (± 227) |227919 (± 6647) |+918.22% |
| 1 range tombstone |2176540 (± 39050) |2434954 (± 24563) |+11.87% |
- Short range scan
| tombstone width | Pre-PR ops/sec | Post-PR ops/sec | ±% |
| ------------- | ------------- | ------------- | ------------- |
| 0 range tombstone |35398 (± 533) |35338 (± 569) |-0.17% |
| 100 |28276 (± 664) |31684 (± 331) |+12.05% |
| 1000 |7637 (± 77) |25422 (± 277) |+232.88% |
| 10000 |1367 |28667 |+1997.07% |
| 1 range tombstone |32618 (± 581) |32748 (± 506) |+0.4% |
- Long range scan
| tombstone width | Pre-PR ops/sec | Post-PR ops/sec | ±% |
| ------------- | ------------- | ------------- | ------------- |
| 0 range tombstone |2262 (± 33) |2353 (± 20) |+4.02% |
| 100 |1696 (± 26) |1926 (± 18) |+13.56% |
| 1000 |410 (± 6) |1255 (± 29) |+206.1% |
| 10000 |25 |414 |+1556.0% |
| 1 range tombstone |1957 (± 30) |2185 (± 44) |+11.65% |
- Microbench does not show significant regression: https://gist.github.com/cbi42/59f280f85a59b678e7e5d8561e693b61
Reviewed By: ajkr
Differential Revision: D38450331
Pulled By: cbi42
fbshipit-source-id: b5ef12e8d8c289ed2e163ccdf277f5039b511fca
Summary:
Many workloads have temporal locality, where recently written items are read back in a short period of time. When using remote file systems, this is inefficient since it involves network traffic and higher latencies. Because of this, we would like to support prepopulating the blob cache during flush.
This task is a part of https://github.com/facebook/rocksdb/issues/10156
Pull Request resolved: https://github.com/facebook/rocksdb/pull/10298
Reviewed By: ltamasi
Differential Revision: D37908743
Pulled By: gangliao
fbshipit-source-id: 9feaed234bc719d38f0c02975c1ad19fa4bb37d1
