0baa5055f1
Summary: These new unit tests should ensure that we don't accidentally change the interpretation of bits for what I call Standard128Ribbon filter internally, available publicly as NewExperimentalRibbonFilterPolicy. There is very little intuitive reason for the values we check against in these tests; I just plug in the right expected values upon watching the test fail initially. Most (but not all) of the tests are essentially "whitebox" "round-trip." We create a filter from fixed keys, and first compare the checksum of those filter bytes against a saved value. We also run queries against other fixed keys, comparing which return false positives against a saved set. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7696 Test Plan: test addition and refactoring only Reviewed By: jay-zhuang Differential Revision: D25082289 Pulled By: pdillinger fbshipit-source-id: b5ca646fdcb5a1c2ad2085eda4a1fd44c4287f67 |
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README.md
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 especially 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/ and https://rocksdb.slack.com/
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.