Revision 8cb7ad83c39379bba1dc24aca71e44f40905550f authored by Igor Canadi on 02 June 2014, 22:33:54 UTC, committed by Igor Canadi on 02 June 2014, 22:33:54 UTC
Summary: We've seen some production issues where column family is detected as stale, although there is only one column family in the system. This is a quick fix that: 1) doesn't flush stale column families if there's only one of them 2) Use 4 as a coefficient instead of 2 for determening when a column family is stale. This will make flushing less aggressive, while still keep a nice dynamic flushing of very stale CFs. Test Plan: make check Reviewers: dhruba, haobo, ljin, sdong Reviewed By: sdong Subscribers: leveldb Differential Revision: https://reviews.facebook.net/D18861
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README.md
## RocksDB: A Persistent Key-Value Store for Flash and RAM Storage
[](https://travis-ci.org/facebook/rocksdb)
RocksDB is developed and maintained by Facebook Database Engineering Team.
It is built on 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 an 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 [doc/index.html](https://github.com/facebook/rocksdb/blob/master/doc/index.html) and
[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/
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