ceph/ceph — pull request #2502 by yuyuyu101 (2014-09-16 06:12:47+00:00)
Title: KeyValueStore: performance improvement and docs

Each write op will has several pglog omap operations and "info" object, it will become a bottleneck for concurrent operations. In KeyValueStore, here want to avoid redundant "set_header" call.

I think FileStore also has the same problem. "infos" object in "meta" collection will be updated for each write op and multi threads will be completed for this obj.