On Thu, Jul 3, 2014 at 8:24 AM, baijia...@126.com <baijia...@126.com> wrote: > when I see the function "OSD::OpWQ::_process ". I find pg lock locks the > whole function. so when I use multi-thread write the same object , so are > they must > serialize from osd handle thread to journal write thread ?
It's serialized while processing the write, but that doesn't include the wait time for the data to be placed on disk — merely sequencing it and feeding it into the journal queue. Writes have to be ordered, so that's not likely to change. -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
