A library that provides an embeddable, persistent key-value store for fast storage.
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Andrew Kryczka 9167ece586 Snapshot release triggered compaction without multiple tombstones (#8357)
Summary:
This is a duplicate of https://github.com/facebook/rocksdb/issues/4948 by mzhaom to fix tests after rebase.

This change is a follow-up to https://github.com/facebook/rocksdb/issues/4927, which made this possible by allowing tombstone dropping/seqnum zeroing optimizations on the last key in the compaction. Now the `largest_seqno != 0` condition suffices to prevent snapshot release triggered compaction from entering an infinite loop.

The issues caused by the extraneous condition `level_and_file.second->num_deletions > 1` are:

- files could have `largest_seqno > 0` forever making it impossible to tell they cannot contain any covering keys
- it doesn't trigger compaction when there are many overwritten keys. Some MyRocks use case actually doesn't use Delete but instead calls Put with empty value to "delete" keys, so we'd like to be able to trigger compaction in this case too.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8357

Test Plan: - make check

Reviewed By: jay-zhuang

Differential Revision: D28855340

Pulled By: ajkr

fbshipit-source-id: a261b51eecafec492499e6d01e8e43112f801798
2021-06-04 00:21:40 -07:00
.circleci Fix cmake build failure with gflags (#8324) 2021-06-01 14:43:15 -07:00
.github/workflows Update clang-format-diff.py path (#7944) 2021-02-09 12:49:38 -08:00
buckifier Allow cache_bench/db_bench to use a custom secondary cache (#8312) 2021-05-19 15:26:18 -07:00
build_tools Try to build with liburing by default. (#8322) 2021-05-21 10:21:53 -07:00
cache fix lru caching test and fix reference binding to null pointer (#8326) 2021-05-24 08:37:00 -07:00
cmake Add find_dependency() in cmake config file. (#6791) 2020-05-12 21:18:29 -07:00
coverage Find the correct gcov (#6904) 2020-06-01 16:33:05 -07:00
db Snapshot release triggered compaction without multiple tombstones (#8357) 2021-06-04 00:21:40 -07:00
db_stress_tool db_stress: wait for compaction to finish after open with failure injection (#8270) 2021-05-05 16:41:45 -07:00
docs Preset dictionary compression blog post (#8342) 2021-05-31 21:31:13 -07:00
env Fix test issue in new env_test tests (#8319) 2021-05-19 10:59:02 -07:00
examples make:Fix c header prototypes (#7994) 2021-03-09 20:44:23 -08:00
file Refactor kill point (#8241) 2021-05-05 15:50:29 -07:00
fuzz Remove Legacy and Custom FileWrapper classes from header files (#7851) 2021-01-28 22:10:32 -08:00
hdfs fix build with 'USE_HDFS' on windows (#6950) 2020-06-12 16:21:50 -07:00
include/rocksdb Update HISTORY and version to 6.21 (#8363) 2021-06-03 19:32:14 -07:00
java Make ImmutableOptions struct that inherits from ImmutableCFOptions and ImmutableDBOptions (#8262) 2021-05-05 14:00:17 -07:00
logging Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033) 2021-03-15 04:34:11 -07:00
memory Use thread-safe strerror_r() to get error message (#8087) 2021-03-24 23:07:27 -07:00
memtable Use deleters to label cache entries and collect stats (#8297) 2021-05-19 16:51:13 -07:00
monitoring Disable IOStatsContext/PerfContext if no thread local (#8117) 2021-04-13 07:56:59 -07:00
options Compare memtable insert and flush count (#8288) 2021-05-20 16:07:28 -07:00
plugin Makefile support to statically link external plugin code (#7918) 2021-02-10 08:35:34 -08:00
port Use deleters to label cache entries and collect stats (#8297) 2021-05-19 16:51:13 -07:00
table fix lru caching test and fix reference binding to null pointer (#8326) 2021-05-24 08:37:00 -07:00
test_util Use bloom filter to speed up sync point (#8337) 2021-05-27 13:14:29 -07:00
third-party Fix a compilation error in CircleCI vs2019 CXX20 (#8090) 2021-03-23 10:28:04 -07:00
tools Fix cmake build failure with gflags (#8324) 2021-06-01 14:43:15 -07:00
trace_replay Add request_id in IODebugContext. (#8045) 2021-04-01 13:14:51 -07:00
util Add remote compaction public API (#8300) 2021-05-19 21:41:31 -07:00
utilities Snapshot release triggered compaction without multiple tombstones (#8357) 2021-06-04 00:21:40 -07:00
.clang-format A script that automatically reformat affected lines 2014-01-14 12:21:24 -08:00
.gitignore gitignore cmake-build-* for CLion integration (#7933) 2021-02-19 13:43:15 -08:00
.lgtm.yml Create lgtm.yml for LGTM.com C/C++ analysis (#4058) 2018-06-26 12:43:04 -07:00
.travis.yml Move arm build from travis to circleci (#8203) 2021-04-19 20:07:02 -07:00
.watchmanconfig Added .watchmanconfig file to rocksdb repo (#5593) 2019-07-19 15:00:33 -07:00
appveyor.yml Remove 2019 from appveyor (#7038) 2020-06-29 14:31:41 -07:00
AUTHORS Update RocksDB Authors File 2017-10-18 14:42:10 -07:00
CMakeLists.txt Fix cmake build failure with gflags (#8324) 2021-06-01 14:43:15 -07:00
CODE_OF_CONDUCT.md Adopt Contributor Covenant 2019-08-29 23:21:01 -07:00
CONTRIBUTING.md Add Code of Conduct 2017-12-05 18:42:35 -08:00
COPYING Add GPLv2 as an alternative license. 2017-04-27 18:06:12 -07:00
DEFAULT_OPTIONS_HISTORY.md options.delayed_write_rate use the rate of rate_limiter by default. 2017-05-24 09:58:24 -07:00
defs.bzl Make testpilot recognize that these tests have coverage instrumentation 2020-03-20 11:23:23 -07:00
DUMP_FORMAT.md First version of rocksdb_dump and rocksdb_undump. 2015-06-19 16:24:36 -07:00
HISTORY.md Snapshot release triggered compaction without multiple tombstones (#8357) 2021-06-04 00:21:40 -07:00
INSTALL.md Update installation instructions (#8158) 2021-04-06 16:02:04 -07:00
issue_template.md Add Google Group to Issue Template 2020-01-28 14:40:37 -08:00
LANGUAGE-BINDINGS.md Add RestoreDBFromLatestBackup to C API, add new C# package (#7092) 2020-07-08 11:56:41 -07:00
LICENSE.Apache Change RocksDB License 2017-07-15 16:11:23 -07:00
LICENSE.leveldb Add back the LevelDB license file 2017-07-16 18:42:18 -07:00
Makefile Add remote compaction public API (#8300) 2021-05-19 21:41:31 -07:00
PLUGINS.md Add ZenFS to plugin list (#8218) 2021-04-22 11:12:40 -07:00
README.md Fix the CI badge for ppc64le Jenkins (#7561) 2020-10-16 09:00:56 -07:00
ROCKSDB_LITE.md Fix some typos in comments and docs. 2018-03-08 10:27:25 -08:00
src.mk Add remote compaction public API (#8300) 2021-05-19 21:41:31 -07:00
TARGETS Add remote compaction public API (#8300) 2021-05-19 21:41:31 -07:00
thirdparty.inc Fix build jemalloc api (#5470) 2019-06-24 17:40:32 -07:00
USERS.md Add Apache Doris to USERS (#7865) 2021-01-19 15:31:56 -08:00
Vagrantfile Adding CentOS 7 Vagrantfile & build script 2018-02-26 15:27:17 -08:00
WINDOWS_PORT.md #5145 , rename port/dirent.h to port/port_dirent.h to avoid compile err when use port dir as header dir output (#5152) 2019-04-04 11:38:19 -07:00

RocksDB: A Persistent Key-Value Store for Flash and RAM Storage

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RocksDB is developed and maintained by Facebook Database Engineering Team. It is built on earlier work on LevelDB by Sanjay Ghemawat (sanjay@google.com) and Jeff Dean (jeff@google.com)

This code is a library that forms the core building block for a fast key-value server, especially suited for storing data on flash drives. It has a Log-Structured-Merge-Database (LSM) design with flexible tradeoffs between Write-Amplification-Factor (WAF), Read-Amplification-Factor (RAF) and Space-Amplification-Factor (SAF). It has multi-threaded compactions, making it especially suitable for storing multiple terabytes of data in a single database.

Start with example usage here: https://github.com/facebook/rocksdb/tree/master/examples

See the github wiki for more explanation.

The public interface is in include/. Callers should not include or rely on the details of any other header files in this package. Those internal APIs may be changed without warning.

Design discussions are conducted in https://www.facebook.com/groups/rocksdb.dev/ and https://rocksdb.slack.com/

License

RocksDB is dual-licensed under both the GPLv2 (found in the COPYING file in the root directory) and Apache 2.0 License (found in the LICENSE.Apache file in the root directory). You may select, at your option, one of the above-listed licenses.