58d7ab3c68
Summary: This patch adds three test cases for ExpandWhileOverlapping() to the compaction_picker_test test suite. ExpandWhileOverlapping() only has an effect if the comparison function for the internal keys allows for overlapping user keys in different SST files on the same level. Thus, this patch adds a comparator based on sequence numbers to compaction_picker_test for the new test cases. Test Plan: - make compaction_picker_test && ./compaction_picker_test -> All tests pass - Replace body of ExpandWhileOverlapping() with `return true` -> Compile and run ./compaction_picker_test as before -> New tests fail Reviewers: sdong, yhchiang, rven, anthony, IslamAbdelRahman, kradhakrishnan, igor Reviewed By: igor Subscribers: dhruba, leveldb Differential Revision: https://reviews.facebook.net/D41277
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/