019aa7074c
Summary: it turns out that, with older GCC shipped from centos7, the SSE42 intrinsics are not available even with "target" specified. so we need to pass "-msse42" for checking compiler's sse4.2 support and for building crc32c.cc which uses sse4.2 intrinsics for crc32. Signed-off-by: Kefu Chai <tchaikov@gmail.com> Closes https://github.com/facebook/rocksdb/pull/2950 Differential Revision: D6032298 Pulled By: siying fbshipit-source-id: 124c946321043661b3fb0a70b6cdf4c9c5126ab4
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/