rocksdb

fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

Akanksha Mahajan a479c2c2b2 Fix stress test failure "Corruption: checksum mismatch" or "Iterator Diverged" with async_io enabled (#10032 ) Summary: In case of non sequential reads with `async_io`, `FilePRefetchBuffer::TryReadFromCacheAsync` can be called for previous blocks with `offset < bufs_[curr_].offset_` which wasn't handled correctly resulting wrong data being returned from buffer. Since `FilePRefetchBuffer::PrefetchAsync` can be called for any data block, it sets `prev_len_` to 0 indicating `FilePRefetchBuffer::TryReadFromCacheAsync` to go for the prefetching even though offset < bufs_[curr_].offset_ This is because async prefetching is always done in second buffer (to avoid mutex) even though curr_ is empty leading to offset < bufs_[curr_].offset_ in some cases. If prev_len_ is non zero then `TryReadFromCacheAsync` returns false if `offset < bufs_[curr_].offset_ && prev_len != 0` indicating reads are not sequential and previous call wasn't PrefetchAsync. - This PR also simplifies `FilePRefetchBuffer::TryReadFromCacheAsync` as it was getting complicated covering different scenarios based on `async_io` enabled/disabled. If `for_compaction` is set true, it now calls `FilePRefetchBufferTryReadFromCache` following synchronous flow as before. Its decided in BlockFetcher.cc Pull Request resolved: https://github.com/facebook/rocksdb/pull/10032 Test Plan: 1. export CRASH_TEST_EXT_ARGS=" --async_io=1" make crash_test -j completed successfully locally 2. make crash_test -j completed successfully locally 3. Reran CircleCi mini crashtest job 4 - 5 times. 4. Updated prefetch_test for more coverage. Reviewed By: anand1976 Differential Revision: D36579858 Pulled By: akankshamahajan15 fbshipit-source-id: 0c428d62b45e12e082a83acf533a5e37a584bedf		2 years ago
.circleci	Point libprotobuf-mutator to the latest verified commit hash (#10028 )	2 years ago
.github/workflows	Use released clang-format instead of the one from dev branch (#9646 )	3 years ago
buckifier	Multi file concurrency in MultiGet using coroutines and async IO (#9968 )	3 years ago
build_tools	Minimum macOS version needed to build v7.2.2 and up is 10.13 (#9976 )	2 years ago
cache	Remove own ToString() (#9955 )	3 years ago
cmake	gcc-11 and cmake related cleanup (#9286 )	3 years ago
coverage	Fix commit_prereq and other targets (#9797 )	3 years ago
db	Move three info logging within DB Mutex to use log buffer (#10029 )	2 years ago
db_stress_tool	Support using ZDICT_finalizeDictionary to generate zstd dictionary (#9857 )	2 years ago
docs	Bump nokogiri from 1.13.4 to 1.13.6 in /docs (#10019 )	2 years ago
env	Use STATIC_AVOID_DESTRUCTION for static objects with non-trivial destructors (#9958 )	3 years ago
examples	Remove BlockBasedTableOptions.hash_index_allow_collision (#9454 )	3 years ago
file	Fix stress test failure "Corruption: checksum mismatch" or "Iterator Diverged" with async_io enabled (#10032 )	2 years ago
fuzz	Fix compilation errors and add fuzzers to CircleCI (#9420 )	3 years ago
include/rocksdb	Seek parallelization (#9994 )	2 years ago
java	Java build: finish compiling before testing (etc) (#10034 )	2 years ago
logging	Use system-wide thread ID in info log lines (#9164 )	3 years ago
memory	Remove ROCKSDB_SUPPORT_THREAD_LOCAL define because it's a part of C++11 (#10015 )	3 years ago
memtable	Rewrite memory-charging feature's option API (#9926 )	3 years ago
microbench	Add microbenchmarks for `DB::GetMergeOperands()` (#9971 )	3 years ago
monitoring	Seek parallelization (#9994 )	2 years ago
options	Fix a bug of not setting enforce_single_del_contracts (#10027 )	2 years ago
plugin	Add initial CMake support to plugin (#9214 )	3 years ago
port	Remove ROCKSDB_SUPPORT_THREAD_LOCAL define because it's a part of C++11 (#10015 )	3 years ago
table	Fix stress test failure "Corruption: checksum mismatch" or "Iterator Diverged" with async_io enabled (#10032 )	2 years ago
test_util	Fix a bug of not setting enforce_single_del_contracts (#10027 )	2 years ago
third-party	Meta-internal folly integration with F14FastMap (#9546 )	3 years ago
tools	Support using ZDICT_finalizeDictionary to generate zstd dictionary (#9857 )	2 years ago
trace_replay	Use std::numeric_limits<> (#9954 )	3 years ago
util	Support using ZDICT_finalizeDictionary to generate zstd dictionary (#9857 )	2 years ago
utilities	fix: build on risc-v (#9215 )	3 years ago
.clang-format	A script that automatically reformat affected lines	11 years ago
.gitignore	Add timestamp support to DBImplReadOnly (#10004 )	3 years ago
.lgtm.yml	Create lgtm.yml for LGTM.com C/C++ analysis (#4058 )	6 years ago
.travis.yml	Fix remaining uses of "backupable" (#9792 )	3 years ago
.watchmanconfig	Added .watchmanconfig file to rocksdb repo (#5593 )	5 years ago
AUTHORS	Update RocksDB Authors File	7 years ago
CMakeLists.txt	Add plugin header install in CMakeLists.txt (#10025 )	2 years ago
CODE_OF_CONDUCT.md	Adopt Contributor Covenant	5 years ago
CONTRIBUTING.md	Add Code of Conduct	7 years ago
COPYING	Add GPLv2 as an alternative license.	8 years ago
DEFAULT_OPTIONS_HISTORY.md	Add Options::DisableExtraChecks, clarify force_consistency_checks (#9363 )	3 years ago
DUMP_FORMAT.md	First version of rocksdb_dump and rocksdb_undump.	10 years ago
HISTORY.md	Update HISTORY for 7.3 release (#10031 )	2 years ago
INSTALL.md	Update supported VS versions in INSTALL.md (#9823 )	3 years ago
LANGUAGE-BINDINGS.md	Update branch name to "main" in README/LANGUAGE_BINDINGS (#8727 )	3 years ago
LICENSE.Apache	Change RocksDB License	7 years ago
LICENSE.leveldb	Add back the LevelDB license file	7 years ago
Makefile	Java build: finish compiling before testing (etc) (#10034 )	2 years ago
PLUGINS.md	Add pmem-rocksdb-plugin link in PLUGINs.md (#9934 )	3 years ago
README.md	README: De-list slack channel, list Google group (#9387 )	3 years ago
ROCKSDB_LITE.md	Fix remaining uses of "backupable" (#9792 )	3 years ago
TARGETS	Add timestamp support to DBImplReadOnly (#10004 )	3 years ago
USERS.md	Add Solana's RocksDB use case in USERS.md (#9558 )	3 years ago
Vagrantfile	Adding CentOS 7 Vagrantfile & build script	7 years ago
WINDOWS_PORT.md	Update branch name in WINDOWS_PORT.md (#8745 )	3 years ago
common.mk	Clean up variables for temporary directory (#9961 )	3 years ago
crash_test.mk	Clean up variables for temporary directory (#9961 )	3 years ago
issue_template.md	Add Google Group to Issue Template	5 years ago
rocksdb.pc.in	Generate pkg-config file via CMake (#9945 )	3 years ago
src.mk	Add timestamp support to DBImplReadOnly (#10004 )	3 years ago
thirdparty.inc	Fix build jemalloc api (#5470 )	5 years ago

README.md

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

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/main/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.

Questions and discussions are welcome on the RocksDB Developers Public Facebook group and email list on Google Groups.

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.