rocksdb

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

reid horuff 6f71d3b68b Improve perf of Pessimistic Transaction expirations (and optimistic transactions) Summary: copy from task 8196669: 1) Optimistic transactions do not support batching writes from different threads. 2) Pessimistic transactions do not support batching writes if an expiration time is set. In these 2 cases, we currently do not do any write batching in DBImpl::WriteImpl() because there is a WriteCallback that could decide at the last minute to abort the write. But we could support batching write operations with callbacks if we make sure to process the callbacks correctly. To do this, we would first need to modify write_thread.cc to stop preventing writes with callbacks from being batched together. Then we would need to change DBImpl::WriteImpl() to call all WriteCallback's in a batch, only write the batches that succeed, and correctly set the state of each batch's WriteThread::Writer. Test Plan: Added test WriteWithCallbackTest to write_callback_test.cc which creates multiple client threads and verifies that writes are batched and executed properly. Reviewers: hermanlee4, anthony, ngbronson Subscribers: leveldb, dhruba Differential Revision: https://reviews.facebook.net/D52863		9 years ago
arcanist_util	Add a mechanism to run all tests in sandcastle	9 years ago
build_tools	Update fbcode_config4.8.1.sh to use update_dependencies.sh	9 years ago
coverage	Fix coverage script	10 years ago
db	Improve perf of Pessimistic Transaction expirations (and optimistic transactions)	9 years ago
doc	Lint everything	9 years ago
examples	Fix examples	9 years ago
hdfs	update posix env schedule call	9 years ago
include/rocksdb	Add BlockBasedTableOptions::index_block_restart_interval	9 years ago
java	Threaded tests for WriteBatch	9 years ago
memtable	[directory includes cleanup] Finish removing util->db dependencies	9 years ago
port	Making use of GetSystemTimePreciseAsFileTime dynamic - code review fixes	9 years ago
table	Add BlockBasedTableOptions::index_block_restart_interval	9 years ago
third-party	Enable MS compiler warning c4244.	9 years ago
tools	Add --allow_concurrent_memtable_write in stress test and run it in crash_test	9 years ago
util	Add BlockBasedTableOptions::index_block_restart_interval	9 years ago
utilities	Improve perf of Pessimistic Transaction expirations (and optimistic transactions)	9 years ago
.arcconfig	Integrate Jenkins with Phabricator	10 years ago
.clang-format	A script that automatically reformat affected lines	11 years ago
.gitignore	New amalgamation target	9 years ago
.travis.yml	Travis CI to disable ROCKSDB_LITE tests	9 years ago
AUTHORS	Add AUTHORS file. Fix #203	10 years ago
CMakeLists.txt	This partially addresses issue https://github.com/facebook/rocksdb/issues/935	9 years ago
CONTRIBUTING.md	facebook accounts are not required for CLA signers	11 years ago
DUMP_FORMAT.md	First version of rocksdb_dump and rocksdb_undump.	10 years ago
HISTORY.md	Add SstFileManager (component tracking all SST file in DBs and control the deletion rate)	9 years ago
INSTALL.md	Simple changes to support builds for ppc64[le] consistent with X86	9 years ago
LICENSE	Fix copyright year	11 years ago
Makefile	Minor fix to makefile	9 years ago
PATENTS	Update Patent Grant.	10 years ago
README.md	Replaced "built on on earlier work" by "built on earlier work" in README.md	10 years ago
ROCKSDB_LITE.md	Optimistic Transactions	10 years ago
USERS.md	Add Wingify to USERS.md	9 years ago
Vagrantfile	RocksDB on FreeBSD support	10 years ago
WINDOWS_PORT.md	Commit both PR and internal code review changes	10 years ago
appveyor.yml	Exclude DBTest.FileCreationRandomFailure as a long running test	9 years ago
src.mk	Remove references to files deleted in commit `abb4052278`	9 years ago
thirdparty.inc	Enable override to 3rd party linkage	9 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/