rocksdb

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

Zichen Zhu 65893ad959 Explicitly closing all directory file descriptors (#10049 ) Summary: Currently, the DB directory file descriptor is left open until the deconstruction process (`DB::Close()` does not close the file descriptor). To verify this, comment out the lines between `db_ = nullptr` and `db_->Close()` (line 512, 513, 514, 515 in ldb_cmd.cc) to leak the ``db_'' object, build `ldb` tool and run ``` strace --trace=open,openat,close ./ldb --db=$TEST_TMPDIR --ignore_unknown_options put K1 V1 --create_if_missing ``` There is one directory file descriptor that is not closed in the strace log. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10049 Test Plan: Add a new unit test DBBasicTest.DBCloseAllDirectoryFDs: Open a database with different WAL directory and three different data directories, and all directory file descriptors should be closed after calling Close(). Explicitly call Close() after a directory file descriptor is not used so that the counter of directory open and close should be equivalent. Reviewed By: ajkr, hx235 Differential Revision: D36722135 Pulled By: littlepig2013 fbshipit-source-id: 07bdc2abc417c6b30997b9bbef1f79aa757b21ff		3 years ago
.circleci	Point libprotobuf-mutator to the latest verified commit hash (#10028 )	3 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 )	3 years ago
cache	Avoid malloc_usable_size() call inside LRU Cache mutex (#10026 )	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	Explicitly closing all directory file descriptors (#10049 )	3 years ago
db_stress_tool	Add support for FastLRUCache in stress and crash tests. (#10081 )	3 years ago
docs	Bump nokogiri from 1.13.4 to 1.13.6 in /docs (#10019 )	3 years ago
env	Explicitly closing all directory file descriptors (#10049 )	3 years ago
examples	Remove BlockBasedTableOptions.hash_index_allow_collision (#9454 )	3 years ago
file	Explicitly closing all directory file descriptors (#10049 )	3 years ago
fuzz	Fix compilation errors and add fuzzers to CircleCI (#9420 )	3 years ago
include/rocksdb	Explicitly closing all directory file descriptors (#10049 )	3 years ago
java	Persist the new MANIFEST after successfully syncing the new WAL during recovery (#9922 )	3 years ago
logging	Deflake unit test BackupEngineTest.Concurrency (#10069 )	3 years ago
memory	Fail DB::Open() if logger cannot be created (#9984 )	3 years ago
memtable	Rewrite memory-charging feature's option API (#9926 )	3 years ago
microbench	Fix flaky db_basic_bench caused by unreleased iterator (#10058 )	3 years ago
monitoring	Persist the new MANIFEST after successfully syncing the new WAL during recovery (#9922 )	3 years ago
options	Support read rate-limiting in SequentialFileReader (#9973 )	3 years ago
plugin	Add initial CMake support to plugin (#9214 )	3 years ago
port	Explicitly closing all directory file descriptors (#10049 )	3 years ago
table	Remove code that only compiles for Visual Studio versions older than 2015 (#10065 )	3 years ago
test_util	Fix a bug of not setting enforce_single_del_contracts (#10027 )	3 years ago
third-party	Meta-internal folly integration with F14FastMap (#9546 )	3 years ago
tools	Explicitly closing all directory file descriptors (#10049 )	3 years ago
trace_replay	Use std::numeric_limits<> (#9954 )	3 years ago
util	Fix compile error in Clang 13 (#10033 )	3 years ago
utilities	Explicitly closing all directory file descriptors (#10049 )	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 )	7 years ago
.travis.yml	Fix remaining uses of "backupable" (#9792 )	3 years ago
.watchmanconfig	Added .watchmanconfig file to rocksdb repo (#5593 )	6 years ago
AUTHORS	Update RocksDB Authors File	7 years ago
CMakeLists.txt	build: fix pkg-config file generation (#9953 )	3 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.md for #9922 (#10092 )	3 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	8 years ago
LICENSE.leveldb	Add back the LevelDB license file	8 years ago
Makefile	Provide support for IOTracing for ReadAsync API (#9833 )	3 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	build: fix pkg-config file generation (#9953 )	3 years ago
src.mk	Add timestamp support to DBImplReadOnly (#10004 )	3 years ago
thirdparty.inc	Fix build jemalloc api (#5470 )	6 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.