akankshamahajan b9cb7b9644 Provide support for FSBuffer for point lookups (#12266) ... Summary: Provide support for FSBuffer for point lookups It also add support for compaction and scan reads that goes through BlockFetcher when readahead/prefetching is not enabled. Some of the compaction/Scan reads goes through FilePrefetchBuffer and some through BlockFetcher. This PR add support to use underlying file system scratch buffer for reads that go through BlockFetcher as for FilePrefetch reads, design is complicated to support this feature. Design - In order to use underlying FileSystem provided scratch for Reads, it uses MultiRead with 1 request instead of Read API which required API change. Pull Request resolved: https://github.com/facebook/rocksdb/pull/12266 Test Plan: Stress test using underlying file system scratch buffer internally. Reviewed By: anand1976 Differential Revision: D53019089 Pulled By: akankshamahajan15 fbshipit-source-id: 4fe3d090d77363320e4b67186fd4d51c005c0961		2024-01-29 15:08:20 -08:00
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.gitkeep	Better management of unreleased HISTORY (#11481)	2023-05-30 16:42:49 -07:00
fsbuffer.md	Provide support for FSBuffer for point lookups (#12266)	2024-01-29 15:08:20 -08:00