Hui Xiao
29c6610617
Summary: **Context/Summary:** This PR adds new stats to measure compaction readahead size for rocksdb managed prefetching (not FS prefetching). It can be used to verify compaction read-ahead is doing what's configured. This PR also excludes compaction readahead stats from user scan readahead stats measured in existing stats so there is a cleaner separating between these two. Bonus: this PR also included some typo fixing about "io activities" Pull Request resolved: https://github.com/facebook/rocksdb/pull/13520 Test Plan: Modified existing test to verify stats Reviewed By: archang19 Differential Revision: D72892850 Pulled By: hx235 fbshipit-source-id: 1a73182061baa044c9c9193a2b0fd967ffe75c4a
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.
Questions and discussions are welcome on the RocksDB Developers Public Facebook group and email list on Google Groups.
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.