Jay Zhuang c2485f2d81 Add buffer prefetch support for non directIO usecase (#7312) ... Summary: A new file interface `SupportPrefetch()` is added. When the user overrides it to `false`, an internal prefetch buffer will be used for readahead. Useful for non-directIO but FS doesn't have readahead support. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7312 Reviewed By: anand1976 Differential Revision: D23329847 Pulled By: jay-zhuang fbshipit-source-id: 71cd4ce6f4a820840294e4e6aec111ab76175527		2020-08-27 18:16:53 -07:00
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rocksdb	Add buffer prefetch support for non directIO usecase (#7312)	2020-08-27 18:16:53 -07:00