Yanqin Jin 729a617b5b Add listener to sample file io (#3933) ... Summary: We would like to collect file-system-level statistics including file name, offset, length, return code, latency, etc., which requires to add callbacks to intercept file IO function calls when RocksDB is running. To collect file-system-level statistics, users can inherit the class `EventListener`, as in `TestFileOperationListener `. Note that `TestFileOperationListener::ShouldBeNotifiedOnFileIO()` returns true. Pull Request resolved: https://github.com/facebook/rocksdb/pull/3933 Differential Revision: D10219571 Pulled By: riversand963 fbshipit-source-id: 7acc577a2d31097766a27adb6f78eaf8b1e8ff15		2018-10-12 18:36:11 -07:00
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rocksdb	Add listener to sample file io (#3933)	2018-10-12 18:36:11 -07:00