a40ce219b9
Summary: Added support for the merge operation to RocksJava. You can specify a merge function to be used on the current database. The merge function can either be one of the functions defined in utilities/merge_operators.h, which can be specified through its corresponding name, or a user-created function that needs to be encapsulated in a JNI object in order to be used. Examples are provided for both use cases. Test Plan: There are unit test in MergeTest.java Reviewers: ankgup87 Subscribers: vladb38 Differential Revision: https://reviews.facebook.net/D24525
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/