rocksdb

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

Yueh-Hsuan Chiang 6c66918645 Speed up DB::Open() and Version creation by limiting the number of FileMetaData initialization. Summary: This diff speeds up DB::Open() and Version creation by limiting the number of FileMetaData initialization. The behavior of Version::UpdateAccumulatedStats() is changed as follows: * It only initializes the first 20 uninitialized FileMetaData from file. This guarantees the size of the latest 20 files will always be compensated when they have any deletion entries. Previously it may initialize all FileMetaData by loading all files at DB::Open(). * In case none the first 20 files has any data entry, UpdateAccumulatedStats() will initialize the FileMetaData of the oldest file. Test Plan: db_test Reviewers: igor, sdong, ljin Reviewed By: ljin Subscribers: leveldb Differential Revision: https://reviews.facebook.net/D24255		10 years ago
build_tools	Cross-platform fix version.sh	10 years ago
coverage	Disable the html-based coverage report by default	11 years ago
db	Speed up DB::Open() and Version creation by limiting the number of FileMetaData initialization.	10 years ago
doc	Remove seek compaction	10 years ago
examples	Make it easier to start using RocksDB	10 years ago
hdfs	hdfs cleanup and compile test against CDH 4.4.	10 years ago
helpers/memenv	Expose in memory Env to the world	10 years ago
include	WriteBatchWithIndex supports an iterator that merge its change with a base iterator.	10 years ago
java	Filters getting disposed by System.gc before EOL	10 years ago
linters	Removed code which prevents `arc lint` from working properly.	10 years ago
port	Avoid off-by-one error when using readlink	10 years ago
table	Merge pull request #327 from dalgaaf/wip-da-SCA-20141001	10 years ago
third-party/rapidjson	Fix a rapidjson compile error in mac.	10 years ago
tools	minor update to benchmark script	10 years ago
util	Fix mac compile, second try	10 years ago
utilities	WriteBatchWithIndex's Iterator bug of SeekToFirst() and SeekToLast()	10 years ago
.arcconfig	Improve/fix bugs for the cpp linter	11 years ago
.clang-format	A script that automatically reformat affected lines	11 years ago
.gitignore	fix java doc directory in git ignore	10 years ago
.travis.yml	Only run make unity on travis instead of make check	10 years ago
AUTHORS	Add AUTHORS file. Fix #203	10 years ago
CONTRIBUTING.md	facebook accounts are not required for CLA signers	10 years ago
HISTORY.md	WriteBatchWithIndex to support an option to overwrite rows when operating the same key	10 years ago
INSTALL.md	Update INSTALL.md	10 years ago
LICENSE	Fix copyright year	10 years ago
Makefile	merge master to resolve merge conflicts	10 years ago
PATENTS	Fix the patent format	11 years ago
README.md	Replaced "built on on earlier work" by "built on earlier work" in README.md	10 years ago
ROCKSDB_LITE.md	RocksDBLite	10 years ago
Vagrantfile	Package generation for Ubuntu and CentOS	10 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/