Haobo Xu bdf1085944 [RocksDB] cleanup EnvOptions ... Summary: This diff simplifies EnvOptions by treating it as POD, similar to Options. - virtual functions are removed and member fields are accessed directly. - StorageOptions is removed. - Options.allow_readahead and Options.allow_readahead_compactions are deprecated. - Unused global variables are removed: useOsBuffer, useFsReadAhead, useMmapRead, useMmapWrite Test Plan: make check; db_stress Reviewers: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D11175		2013-06-12 11:17:19 -07:00
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memenv	[RocksDB] cleanup EnvOptions	2013-06-12 11:17:19 -07:00