Revision 48e7effa79d1ab165e83b2f96455f77ffd79cca3 authored by Siying Dong on 26 March 2019, 02:14:04 UTC, committed by Facebook Github Bot on 26 March 2019, 02:18:04 UTC
Summary: With https://github.com/facebook/rocksdb/pull/3009 we go through every CF to check whether a bottommost compaction is needed to be triggered. This is done within DB mutex. What we do within DB mutex may heavily influece the write throughput we can achieve, so we always want to minimize work there. Here we try to avoid this for-loop by first check a global threshold. In most of the time, the CF loop can be avoided. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5090 Differential Revision: D14582684 Pulled By: siying fbshipit-source-id: 968f6d9bb6affe1a5ebc4910b418300b076f166f
1 parent 52e6404
README.md
## RocksDB: A Persistent Key-Value Store for Flash and RAM Storage
[](https://travis-ci.org/facebook/rocksdb)
[](https://ci.appveyor.com/project/Facebook/rocksdb/branch/master)
[](http://140.211.168.68:8080/job/Rocksdb)
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](https://github.com/facebook/rocksdb/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/
## 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.
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