e7d902e693
Summary: add direct_io and compaction_readahead_size in db_stress test direct_io under db_stress with compaction_readahead_size enabled to capture bugs found in production. `./db_stress --allow_concurrent_memtable_write=0 --use_direct_reads --use_direct_writes --compaction_readahead_size=4096` Closes https://github.com/facebook/rocksdb/pull/1906 Differential Revision: D4604514 Pulled By: IslamAbdelRahman fbshipit-source-id: ebbf0ee