rocksdb

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

Siying Dong b555ed30a4 Customized BlockBasedTableIterator and LevelIterator Summary: Use a customzied BlockBasedTableIterator and LevelIterator to replace current implementations leveraging two-level-iterator. Hope the customized logic will make code easier to understand. As a side effect, BlockBasedTableIterator reduces the allocation for the data block iterator object, and avoid the virtual function call to it, because we can directly reference BlockIter, a final class. Similarly, LevelIterator reduces virtual function call to the dummy iterator iterating the file metadata. It also enabled further optimization. The upper bound check is also moved from index block to data block. This implementation fits this iterator better. After the change, forwared iterator is slightly optimized to ensure we trim those iterators. The two-level-iterator now is only used by partitioned index, so it is simplified. Closes https://github.com/facebook/rocksdb/pull/3406 Differential Revision: D6809041 Pulled By: siying fbshipit-source-id: 7da3b9b1d3c8e9d9405302c15920af1fcaf50ffa		7 years ago
buckifier	Suppress lint in old files	7 years ago
build_tools	Suppress lint in old files	7 years ago
cache	Minor typo in comment (s/pro/pri)	7 years ago
cmake	add missing config checks to CMakeLists.txt	7 years ago
coverage	Suppress lint in old files	7 years ago
db	Customized BlockBasedTableIterator and LevelIterator	7 years ago
docs	fix Gemfile.lock nokogiri dependencies	7 years ago
env	Suppress unused warnings	7 years ago
examples	Pinnableslice examples and blog post	7 years ago
hdfs	Suppress lint in old files	7 years ago
include/rocksdb	WritePrepared Txn: use TransactionDBWriteOptimizations (2nd attempt)	7 years ago
java	Java: Add copy constructors for various option classes	7 years ago
memtable	WritePrepared Txn: Duplicate Keys, Memtable part	7 years ago
monitoring	Compilation fixes for powerpc build, -Wparentheses-equality error and missing header guards	7 years ago
options	options: Fix coverity issues	7 years ago
port	Explictly fail writes if key or value is not smaller than 4GB	7 years ago
table	Customized BlockBasedTableIterator and LevelIterator	7 years ago
third-party	Enable MSVC W4 with a few exceptions. Fix warnings and bugs	7 years ago
tools	db_bench separate options for partition index and filters	7 years ago
util	Compilation fixes for powerpc build, -Wparentheses-equality error and missing header guards	7 years ago
utilities	WritePrepared Txn: use TransactionDBWriteOptimizations (2nd attempt)	7 years ago
.clang-format	A script that automatically reformat affected lines	11 years ago
.gitignore	Remove leftover references to phutil_module_cache	7 years ago
.travis.yml	CMake cross platform Java support and add JNI to travis	7 years ago
AUTHORS	Update RocksDB Authors File	7 years ago
CMakeLists.txt	CMake changes for CRC32 Optimization on PowerPC	7 years ago
CODE_OF_CONDUCT.md	Add Code of Conduct	7 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	options.delayed_write_rate use the rate of rate_limiter by default.	8 years ago
DUMP_FORMAT.md	First version of rocksdb_dump and rocksdb_undump.	10 years ago
HISTORY.md	Add delay before flush in CompactRange to avoid write stalling	7 years ago
INSTALL.md	FreeBSD build support for RocksDB and RocksJava	7 years ago
LANGUAGE-BINDINGS.md	Add Nim to the list of language bindings	7 years ago
LICENSE.Apache	Change RocksDB License	8 years ago
LICENSE.leveldb	Add back the LevelDB license file	8 years ago
Makefile	Disable options_settable_test in UBSAN and fix UBSAN failure in blob_…	7 years ago
README.md	Add Jenkins for PPC64le build status badge	7 years ago
ROCKSDB_LITE.md	Optimistic Transactions	10 years ago
TARGETS	WritePrepared Txn: make buck tests parallel	7 years ago
USERS.md	Added ProfaneDB	7 years ago
Vagrantfile	Update Vagrant file (test internal phabricator workflow)	8 years ago
WINDOWS_PORT.md	Commit both PR and internal code review changes	10 years ago
appveyor.yml	Upgrade Appveyor to VS2017	7 years ago
issue_template.md	Add a template for issues	7 years ago
src.mk	Refactor ReadBlockContents()	7 years ago
thirdparty.inc	Make Windows dep switches compatible with other builds	7 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/