sdong a931bacf5d Improve SimulatedHybridFileSystem (#9301)
Summary:
Several improvements to SimulatedHybridFileSystem:
(1) Allow a mode where all I/Os to all files simulate HDD. This can be enabled in db_bench using -simulate_hdd
(2) Latency calculation is slightly more accurate
(3) Allow to simulate more than one HDD spindles.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9301

Test Plan: Run db_bench and observe the results are reasonable.

Reviewed By: jay-zhuang

Differential Revision: D33141662

fbshipit-source-id: b736e58c4ba910d06899cc9ccec79b628275f4fa
2021-12-29 11:14:42 -08:00
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2017-08-03 15:56:46 -07:00
2017-08-03 15:56:46 -07:00