80ac7412b5
Summary: Use smaller and more predictable behaviors Pull Request resolved: https://github.com/facebook/rocksdb/pull/9257 Test Plan: gtest-parallel --repeat=N ./backupable_db_test --gtest_filter=BackupEngineTest.FileCollision before (N=50) we see inconsistent sets of SST files $ find /dev/shm/rocksdb_blah/ | grep -o '/00.*sst' | grep -o '^[^_]*' | sort | uniq -c 49 /000009 3 /000010 1 /000010.sst 49 /000012 3 /000013 1 /000013.sst 49 /000015 2 /000016 1 /000016.sst 22 /000018 2 /000019 1 /000019.sst 29 /000020 11 /000021 2 /000021.sst 46 /000022 2 /000022.sst 4 /000023 1 /000023.sst 27 /000025 And after (N=5000) we see $ find /dev/shm/rocksdb_blah/ | grep -o '/00.*sst' | grep -o '^[^_]*' | sort | uniq -c 10000 /000009 10000 /000012 5000 /000015 Reviewed By: ajkr Differential Revision: D32888393 Pulled By: pdillinger fbshipit-source-id: 5bfd075b3184bb66c5613758a53f431c406e9808
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/main/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.