Maysam Yabandeh fbfa3e7a43 WriteAtPrepare: Efficient read from snapshot list ... Summary: Divide the old snapshots to two lists: a few that fit into a cached array and the rest in a vector, which is expected to be empty in normal cases. The former is to optimize concurrent reads from snapshots without requiring locks. It is done by an array of std::atomic, from which std::memory_order_acquire reads are compiled to simple read instructions in most of the x86_64 architectures. Closes https://github.com/facebook/rocksdb/pull/2758 Differential Revision: D5660504 Pulled By: maysamyabandeh fbshipit-source-id: 524fcf9a8e7f90a92324536456912a99aaa6740c		2017-08-26 01:00:38 -07:00
..
rocksdb	WriteAtPrepare: Efficient read from snapshot list	2017-08-26 01:00:38 -07:00