2914de64e8
Summary: add SIM_BLOCK_CACHE_HIT and SIM_BLOCK_CACHE_MISS tickers. maybe can be combined with Histograms like DB_GET to evaluate the current setting of the size of block cache. Test Plan: make all check Reviewers: sdong, andrewkr, IslamAbdelRahman, yiwu Reviewed By: yiwu Subscribers: andrewkr, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D61803
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/