b058a33705
Summary: Previously `python tools/db_crashtest.py blackbox` would do no useful work as the crash interval (two minutes) was shorter than the preparation phase. The preparation phase is slow because of the ridiculously inefficient way it computes which keys should not be overwritten. It was doing this for 60M keys since default values were `FLAGS_nooverwritepercent == 60` and `FLAGS_max_key == 100000000`. Move the "nooverwritepercent" override from whitebox-specific to the general options so it also applies to blackbox test runs. Now preparation phase takes a few seconds. Closes https://github.com/facebook/rocksdb/pull/3671 Differential Revision: D7457732 Pulled By: ajkr fbshipit-source-id: 601f4461a6a7e49e50449dcf15aebc9b8a98d6f0
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/
License
RocksDB is dual-licensed under both the GPLv2 (found in the COPYING file in the root directory) and Apache 2.0 License (found in the LICENSE.Apache file in the root directory). You may select, at your option, one of the above-listed licenses.