On Thu, Jan 12, 2017 at 2:19 AM, Eugen Block <ebl...@nde.ag> wrote: > Hi, > > I simply grepped for "slow request" in ceph.log. What exactly do you mean by > "effective OSD"? > > If I have this log line: > 2017-01-11 [...] osd.16 [...] cluster [WRN] slow request 32.868141 seconds > old, received at 2017-01-11 [...] ack+ondisk+write+known_if_redirected > e12440) currently waiting for subops from 0,12 > > I assumed that osd.16 is the one causing problems.
0 and/or 12 in this case. 16 is just waiting. Looking at the output of dump_historic_ops and dump_ops_in_flight on the implicated osds may help to narrow down what the issue is. > But now that you mention > the subops, I only noticed them yesterday, but didn't have the time yet to > investigate further. I'll have a look into the subops messages and report > back. > > Thanks! > Eugen > > Zitat von Burkhard Linke <burkhard.li...@computational.bio.uni-giessen.de>: > > >> Hi, >> >> >> just for clarity: >> >> >> Did you parse the slow request messages and use the effective OSD in the >> statistics? Some message may refer to other OSDs, e.g. "waiting for sub op >> on OSD X,Y". The reporting OSD is not the root cause in that case, but one >> of the mentioned OSDs (and I'm currently not aware of a method to determine >> which of the both OSD is the cause in case of 3 replicates.....). >> >> >> Regards, >> >> Burkhard >> >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@lists.ceph.com >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > -- > Eugen Block voice : +49-40-559 51 75 > NDE Netzdesign und -entwicklung AG fax : +49-40-559 51 77 > Postfach 61 03 15 > D-22423 Hamburg e-mail : ebl...@nde.ag > > Vorsitzende des Aufsichtsrates: Angelika Mozdzen > Sitz und Registergericht: Hamburg, HRB 90934 > Vorstand: Jens-U. Mozdzen > USt-IdNr. DE 814 013 983 > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- Cheers, Brad _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
