On Mon, 18 Feb 2013, Yehuda Sadeh wrote: > > Here shows osd receiving the request from rgw and almost immediately queuing > > it. 0.29 secs pass while this operation gets a chance to actually work. It > > Yeah, that's the culprit. That's around ~120 leveldb write operations > per second. Sam, does that number make sense to you? The problem is actually that it's XFS and so the OSD is doing writeahead journaling, and the operation is a read/modify/write. That serializes the updates with a journal commit. A faster journal will help, as will using btrfs... :/ sage _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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