Andrew Kryczka 73a847ef89 Add per-level compression ratio property ... Summary: This is needed so we can measure compression ratio improvements achieved by D52287. The property compares raw data size against the total file size for a given level. If the level is empty it should return 0.0. Test Plan: new unit test Reviewers: IslamAbdelRahman, yhchiang, sdong Reviewed By: sdong Subscribers: andrewkr, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D56967		2016-04-20 18:46:54 -07:00
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rocksdb	Add per-level compression ratio property	2016-04-20 18:46:54 -07:00