rocksdb

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

Andrew Kryczka afad5bd1c5 Simplify thread-local static initialization Summary: The call stack used to look like this during static initialization: #0 0x00000000008032d1 in rocksdb::ThreadLocalPtr::StaticMeta::StaticMeta() (this=0x7ffff683b300) at util/thread_local.cc:172 #1 0x00000000008030a7 in rocksdb::ThreadLocalPtr::Instance() () at util/thread_local.cc:135 #2 0x000000000080310f in rocksdb::ThreadLocalPtr::StaticMeta::Mutex() () at util/thread_local.cc:141 #3 0x0000000000803103 in rocksdb::ThreadLocalPtr::StaticMeta::InitSingletons() () at util/thread_local.cc:139 #4 0x000000000080305d in rocksdb::ThreadLocalPtr::InitSingletons() () at util/thread_local.cc:106 It involves outer/inner classes and the call stacks goes outer->inner->outer->inner, which is too difficult to understand. We can avoid a level of back-and-forth by skipping StaticMeta::InitSingletons(), which doesn't initialize anything beyond what ThreadLocalPtr::Instance() already initializes. Now the call stack looks like this during static initialization: #0 0x00000000008032c5 in rocksdb::ThreadLocalPtr::StaticMeta::StaticMeta() (this=0x7ffff683b300) at util/thread_local.cc:170 #1 0x00000000008030a7 in rocksdb::ThreadLocalPtr::Instance() () at util/thread_local.cc:135 #2 0x000000000080305d in rocksdb::ThreadLocalPtr::InitSingletons() () at util/thread_local.cc:106 Test Plan: unit tests verify StaticMeta::mutex_ is still initialized in DefaultEnv() (StaticMeta::mutex_ is the only variable intended to be initialized via StaticMeta::InitSingletons() which I removed) #0 0x00000000005cee17 in rocksdb::port::Mutex::Mutex(bool) (this=0x7ffff69500b0, adaptive=false) at port/port_posix.cc:52 #1 0x0000000000769cf8 in rocksdb::ThreadLocalPtr::StaticMeta::StaticMeta() (this=0x7ffff6950000) at util/thread_local.cc:168 #2 0x0000000000769a53 in rocksdb::ThreadLocalPtr::Instance() () at util/thread_local.cc:133 #3 0x0000000000769a09 in rocksdb::ThreadLocalPtr::InitSingletons() () at util/thread_local.cc:105 #4 0x0000000000647d98 in rocksdb::Env::Default() () at util/env_posix.cc:845 Reviewers: lightmark, yhchiang, sdong Reviewed By: sdong Subscribers: arahut, IslamAbdelRahman, yiwu, andrewkr, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D60813		8 years ago
arcanist_util	Testing out parallel sandcastle changes	8 years ago
build_tools	Remove an extra apostrophe	8 years ago
coverage	Fix coverage script	10 years ago
db	add InDomain regression test	8 years ago
doc	Lint everything	9 years ago
examples	Introduce FullMergeV2 (eliminate memcpy from merge operators)	8 years ago
hdfs	using java7 in runtime for hdfs env (#1072 )	8 years ago
include/rocksdb	Change options memtable_prefix_bloom_huge_page_tlb_size => memtable_huge_page_size and cover huge page to memtable too	8 years ago
java	fixes 1217: rocksdbjni javac and javah execute_processes fail on windows (#1218 )	8 years ago
memtable	Updated all copyright headers to the new format.	9 years ago
port	stack_trace,cc: The current Stacktrace code does not compile for FreeBSD (#1153 )	8 years ago
table	Only cache level 0 indexes and filter when opening table reader	8 years ago
third-party	Fix clang analyzer errors	8 years ago
tools	db_stress shouldn't assert file size 0 if file creation fails	8 years ago
util	Simplify thread-local static initialization	8 years ago
utilities	Add EnvLibrados - RocksDB Env of RADOS (#1222 )	8 years ago
.arcconfig	Integrate Jenkins with Phabricator	10 years ago
.clang-format	A script that automatically reformat affected lines	11 years ago
.gitignore	Update .gitignore for internal release	8 years ago
.travis.yml	Re-enable linux on travis	8 years ago
AUTHORS	Add AUTHORS file. Fix #203	10 years ago
CMakeLists.txt	fixes 1230: Error:string sub-command REGEX, mode REPLACE needs at least 6 arguments total to command (#1231 )	8 years ago
CONTRIBUTING.md	facebook accounts are not required for CLA signers	10 years ago
DEFAULT_OPTIONS_HISTORY.md	Release RocksDB 4.8.0	8 years ago
DUMP_FORMAT.md	First version of rocksdb_dump and rocksdb_undump.	9 years ago
HISTORY.md	Change options memtable_prefix_bloom_huge_page_tlb_size => memtable_huge_page_size and cover huge page to memtable too	8 years ago
INSTALL.md	Simple changes to support builds for ppc64[le] consistent with X86	9 years ago
LANGUAGE-BINDINGS.md	Update LANGUAGE-BINDINGS.md	8 years ago
LICENSE	Updated all copyright headers to the new format.	9 years ago
Makefile	Testing out parallel sandcastle changes	8 years ago
PATENTS	Update Patent Grant.	10 years ago
README.md	Appveyor badge to show master branch	8 years ago
ROCKSDB_LITE.md	Optimistic Transactions	9 years ago
USERS.md	Update USER.md to include more services at Facebook.	8 years ago
Vagrantfile	RocksDB on FreeBSD support	10 years ago
WINDOWS_PORT.md	Commit both PR and internal code review changes	9 years ago
appveyor.yml	Disable long running GroupCommitTest (#1125 )	8 years ago
src.mk	Fix Statistics TickersNameMap miss match with Tickers enum	8 years ago
thirdparty.inc	Introduce XPRESS compresssion on Windows. (#1081 )	8 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 specially 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/