5c8f2ee786
On Windows two tests fail that use MockTable: flush_job_test and compaction_job_test with the following message: compaction_job_test_je.exe : Assertion failed: result.size() == 4, file c:\dev\rocksdb\rocksdb\table\mock_table.cc, line 110 Investigation reveals that this failure occurs when a 4 byte ID written to a beginning of the physically open file (main contents remains in a in-memory map) can not be read back. The reason for the failure is that the ID is written directly to a WritableFile bypassing WritableFileWriter. The side effect of that is that pending_sync_ never becomes true so the file is never flushed, however, the direct cause of the failure is that the filesize_ member of the WritableFileWriter remains zero. At Close() the file is truncated to that size and the file becomes empty so the ID can not be read back.
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/