1## RocksDB: A Persistent Key-Value Store for Flash and RAM Storage 2 3[](https://travis-ci.org/facebook/rocksdb) 4[](https://ci.appveyor.com/project/Facebook/rocksdb/branch/master) 5[](http://140.211.168.68:8080/job/Rocksdb) 6 7RocksDB is developed and maintained by Facebook Database Engineering Team. 8It is built on earlier work on [LevelDB](https://github.com/google/leveldb) by Sanjay Ghemawat (sanjay@google.com) 9and Jeff Dean (jeff@google.com) 10 11This code is a library that forms the core building block for a fast 12key-value server, especially suited for storing data on flash drives. 13It has a Log-Structured-Merge-Database (LSM) design with flexible tradeoffs 14between Write-Amplification-Factor (WAF), Read-Amplification-Factor (RAF) 15and Space-Amplification-Factor (SAF). It has multi-threaded compactions, 16making it especially suitable for storing multiple terabytes of data in a 17single database. 18 19Start with example usage here: https://github.com/facebook/rocksdb/tree/master/examples 20 21See the [github wiki](https://github.com/facebook/rocksdb/wiki) for more explanation. 22 23The public interface is in `include/`. Callers should not include or 24rely on the details of any other header files in this package. Those 25internal APIs may be changed without warning. 26 27Design discussions are conducted in https://www.facebook.com/groups/rocksdb.dev/ 28 29## License 30 31RocksDB 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. 32
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