rocksdb

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

Changyu Bi f631138e1c Better support for merge operation with data block hash index (#11356 ) Summary: when data block hash index finds a key of op_type `kTypeMerge`, do not redo data block seek. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11356 Test Plan: - added new unit test - crash test: `python3 tools/db_crashtest.py whitebox --simple --use_merge=1 --data_block_index_type=1` - benchmark see slight improvement in read throughput: ``` TEST_TMPDIR=/dev/shm/hashindex ./db_bench -benchmarks=mergerandom -use_existing_db=false -num=10000000 -compression_type=none -level_compaction_dynamic_level_bytes=1 -merge_operator=PutOperator -write_buffer_size=1000000 --use_data_block_hash_index=1 TEST_TMPDIR=/dev/shm/hashindex ./db_bench -benchmarks=readrandom[-X10] -use_existing_db=true -num=10000000 -merge_operator=PutOperator -readonly=1 -disable_auto_compactions=1 -reads=100000 Main: readrandom [AVG 10 runs] : 29526 (± 1118) ops/sec; 2.1 (± 0.1) MB/sec Post-PR: readrandom [AVG 10 runs] : 31095 (± 662) ops/sec; 2.2 (± 0.0) MB/sec ``` Reviewed By: pdillinger Differential Revision: D44759895 Pulled By: cbi42 fbshipit-source-id: 387f0c35938c7e0e96b810ca3babf1967fc68191		2 years ago
.circleci	Revert enabling IO uring in db_stress (#11242 )	2 years ago
.github/workflows	ci: add GitHub token permissions for workflow (#10549 )	2 years ago
buckifier	Cleanup, improve, stress test LockWAL() (#11143 )	2 years ago
build_tools	Remove platform009 and default to platform010 (#11333 )	2 years ago
cache	Re-clarify SecondaryCache API (#11316 )	2 years ago
cmake	gcc-11 and cmake related cleanup (#9286 )	3 years ago
coverage	Remove platform009 and default to platform010 (#11333 )	2 years ago
db	Better support for merge operation with data block hash index (#11356 )	2 years ago
db_stress_tool	Extend the stress test coverage of MultiGetEntity (#11336 )	2 years ago
docs	Remove docs/Gemfile.lock and update github-pages version (#11173 )	2 years ago
env	Ignore async_io ReadOption if FileSystem doesn't support it (#11296 )	2 years ago
examples	Remove RocksDB LITE (#11147 )	2 years ago
file	Ensure VerifyFileChecksums reads don't exceed readahead_size (#11328 )	2 years ago
fuzz	Add some missing headers (#10519 )	2 years ago
include/rocksdb	Filter table files by timestamp: Get operator (#11332 )	2 years ago
java	New stat rocksdb.{cf\|db}-write-stall-stats exposed in a structural way (#11300 )	2 years ago
logging	Disabling some IO error assertion in EnvLogger (#11314 )	2 years ago
memory	Remove RocksDB LITE (#11147 )	2 years ago
memtable	Add `SetAllowStall()` (#11335 )	2 years ago
microbench	Avoid allocations/copies for large `GetMergeOperands()` results (#10458 )	2 years ago
monitoring	Filter table files by timestamp: Get operator (#11332 )	2 years ago
options	Change default block cache from 8MB to 32MB (#11350 )	2 years ago
plugin	Add initial CMake support to plugin (#9214 )	3 years ago
port	Ignore async_io ReadOption if FileSystem doesn't support it (#11296 )	2 years ago
table	Better support for merge operation with data block hash index (#11356 )	2 years ago
test_util	HyperClockCache support for SecondaryCache, with refactoring (#11301 )	2 years ago
third-party	Meta-internal folly integration with F14FastMap (#9546 )	3 years ago
tools	Change default block cache from 8MB to 32MB (#11350 )	2 years ago
trace_replay	Fix error maybe-uninitialized #11100 (#11101 )	2 years ago
util	Use user-provided ReadOptions for metadata block reads more often (#11208 )	2 years ago
utilities	HyperClockCache support for SecondaryCache, with refactoring (#11301 )	2 years ago
.clang-format	A script that automatically reformat affected lines	11 years ago
.gitignore	Git ignore .clangd/ (#10817 )	2 years ago
.lgtm.yml	Create lgtm.yml for LGTM.com C/C++ analysis (#4058 )	6 years ago
.watchmanconfig	Added .watchmanconfig file to rocksdb repo (#5593 )	5 years ago
AUTHORS	Update RocksDB Authors File	7 years ago
CMakeLists.txt	New stat rocksdb.{cf\|db}-write-stall-stats exposed in a structural way (#11300 )	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	Drain unnecessary levels when `level_compaction_dynamic_level_bytes=true` (#11340 )	2 years ago
INSTALL.md	Add instructions for installing googlebenchmark (#11282 )	2 years ago
LANGUAGE-BINDINGS.md	Add grocksdb in Go language bindings (#10498 )	2 years ago
LICENSE.Apache	Change RocksDB License	7 years ago
LICENSE.leveldb	Add back the LevelDB license file	7 years ago
Makefile	Revert to LIB_MODE=static for optimized builds (#11195 )	2 years ago
PLUGINS.md	Add pmem-rocksdb-plugin link in PLUGINs.md (#9934 )	3 years ago
README.md	Remove Travis CI (#10407 )	2 years ago
TARGETS	New stat rocksdb.{cf\|db}-write-stall-stats exposed in a structural way (#11300 )	2 years ago
USERS.md	Add Microsoft Bing as a user (#11270 )	2 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	Allow a custom DB cleanup command to be passed to db_crashtest.py (#10883 )	2 years ago
issue_template.md	Add Google Group to Issue Template	5 years ago
rocksdb.pc.in	build: fix pkg-config file generation (#9953 )	2 years ago
src.mk	New stat rocksdb.{cf\|db}-write-stall-stats exposed in a structural way (#11300 )	2 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.