http://ceph.com/releases/v0-80-8-firefly-released/
osd: fix snap trimming performance issues #9487 #9113 Cheers, Dan On Jul 4, 2015 1:37 PM, "Shinobu Kinjo" <shinobu...@gmail.com> wrote: > Can you tell us when it was fixed so that we see this fix on github? > > Kinjo > > On Sat, Jul 4, 2015 at 8:08 PM, Dan van der Ster <d...@vanderster.com> > wrote: > >> Hi, >> >> You should upgrade to the latest firefly release. Your probably suffering >> from the known issue with snapshot trimming. >> >> Cheers, Dan >> >> On Jul 4, 2015 10:19, "Eino Tuominen" <e...@utu.fi> wrote: >> > >> > Hello, >> > >> > We are running 0.80.5 on our production cluster and we are seeing slow >> requests when deleting rbd snapshots. We have now reduced snapshot counts >> to 4 weeklies but it seems that the snapshot count is not a factor of this >> problem. The cluster is practically unresponsive so long that clients >> timeout. >> > >> > Here are top ten slowest requests per osd from last night (times in >> seconds): >> > >> > 1 /var/log/ceph/ceph-osd.46.log 1920 >> > 2 /var/log/ceph/ceph-osd.42.log 1455 >> > 3 /var/log/ceph/ceph-osd.74.log 1292 >> > 4 /var/log/ceph/ceph-osd.77.log 1170 >> > 5 /var/log/ceph/ceph-osd.48.log 1083 >> > 6 /var/log/ceph/ceph-osd.0.log 960 >> > 7 /var/log/ceph/ceph-osd.40.log 960 >> > 8 /var/log/ceph/ceph-osd.57.log 960 >> > 9 /var/log/ceph/ceph-osd.61.log 960 >> > 10 /var/log/ceph/ceph-osd.76.log 960 >> > >> > Some OSDs don't report slow requests at all, they are not evenly >> distributed. >> > >> > Currently we run journals on the osd sata drives, but are considering >> upgrading to SSD journals. However, we do not have any performance problems >> other than when deleting snapshots. >> > >> > Is there any way to mitigate the problem other than investing on SSD >> journals? >> > >> > -- >> > Eino Tuominen >> > _______________________________________________ >> > ceph-users mailing list >> > ceph-users@lists.ceph.com >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@lists.ceph.com >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> > > > -- > Life w/ Linux <http://i-shinobu.hatenablog.com/> >
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