04751d5345
Summary: Currently, we don't use options.compression_per_level[0] as the compression style for L0 compression type, unless it is None. This behavior doesn't look like on purpose. This diff will make sure L0 compress using the style of options.compression_per_level[0]. Reviewed and accepted in: https://reviews.facebook.net/D65607 Closes https://github.com/facebook/rocksdb/pull/1435 Differential Revision: D4099368 Pulled By: siying fbshipit-source-id: cfbbdcd
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/