f5d4dbbeef
Summary: Compressed block cache is disabled in https://github.com/facebook/rocksdb/pull/4650 for no good reason. Re-enable it. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6990 Test Plan: Add a unit test to make sure a general function works with read-only DB + compressed block cache. Reviewed By: ltamasi Differential Revision: D22072755 fbshipit-source-id: 2a55df6363de23a78979cf6c747526359e5dc7a1