[ Keeping this on the users list. ] Okay, so next time this happens you probably want to do a pg query on the PG which has been reported as dirty. I can't help much beyond that, but hopefully Kefu or David will chime in once there's a little more for them to look at. -Greg On Mon, Mar 7, 2016 at 1:00 PM, Jeffrey McDonald <jmcdonal@xxxxxxx> wrote: > Hi Greg, > > I'm running the ceph version hammer, > ceph version 0.94.5 (9764da52395923e0b32908d83a9f7304401fee43) > > The hardware migration was performed by just setting the crush map to zero > for the OSD we wanted to retire. The system was performing poorly with > these older OSDs and we had a difficult time maintaining stability of the > system. The old OSDs are still there but all of the data is now migrated > to new and/or existing hardware. > > Thanks, > Jeff > > > > > > On Mon, Mar 7, 2016 at 2:56 PM, Gregory Farnum <gfarnum@xxxxxxxxxx> wrote: >> >> On Mon, Mar 7, 2016 at 12:07 PM, Jeffrey McDonald <jmcdonal@xxxxxxx> >> wrote: >> > Hi, >> > >> > For a while, we've been seeing inconsistent placement groups on our >> > erasure >> > coded system. The placement groups go from a state of active+clean to >> > active+clean+inconsistent after a deep scrub: >> > >> > >> > 2016-03-07 13:45:42.044131 7f385d118700 -1 log_channel(cluster) log >> > [ERR] : >> > 70.320s0 deep-scrub stat mismatch, got 21446/21428 objects, 0/0 clones, >> > 21446/21428 dirty, 0/0 omap, 0/0 hit_set_archive, 0/0 whiteouts, >> > 64682334170/64624353083 bytes,0/0 hit_set_archive bytes. >> > 2016-03-07 13:45:42.044416 7f385d118700 -1 log_channel(cluster) log >> > [ERR] : >> > 70.320s0 deep-scrub 18 missing, 0 inconsistent objects >> > 2016-03-07 13:45:42.044464 7f385d118700 -1 log_channel(cluster) log >> > [ERR] : >> > 70.320 deep-scrub 73 errors >> > >> > So I tell the placement group to perform a repair: >> > >> > 2016-03-07 13:49:26.047177 7f385d118700 0 log_channel(cluster) log >> > [INF] : >> > 70.320 repair starts >> > 2016-03-07 13:49:57.087291 7f3858b0a700 0 -- 10.31.0.2:6874/13937 >> >> > 10.31.0.6:6824/8127 pipe(0x2e578000 sd=697 :6874 >> > >> > The repair finds missing shards and repairs them, but then I have 18 >> > 'unfound objects' : >> > >> > >> > 2016-03-07 13:51:28.467590 7f385d118700 -1 log_channel(cluster) log >> > [ERR] : >> > 70.320s0 repair stat mismatch, got 21446/21428 objects, 0/0 clones, >> > 21446/21428 dirty, 0/0 omap, 0/0 hit_set_archive, 0/0 whiteouts, >> > 64682334170/64624353083 bytes,0/0 hit_set_archive bytes. >> > 2016-03-07 13:51:28.468358 7f385d118700 -1 log_channel(cluster) log >> > [ERR] : >> > 70.320s0 repair 18 missing, 0 inconsistent objects >> > 2016-03-07 13:51:28.469431 7f385d118700 -1 log_channel(cluster) log >> > [ERR] : >> > 70.320 repair 73 errors, 73 fixed >> > >> > >> > I've traced one of the unfound objects all the way through the system >> > and >> > I've found that they are not really lost. I can fail over the osd and >> > recover the files. This is happening quite regularly now after a large >> > migration of data from old hardware to new(migration is now complete). >> > >> > The system sets the PG into 'recovery', but we've seen the system in a >> > recovering state for many days. Should we just be patient or do we >> > need >> > to dig further into the issue? >> >> You may need to dig into this more, although I'm not sure what the >> issue is likely to be. What version of Ceph are you running? How did >> you do this hardware migration? >> -Greg >> >> > >> > >> > pg 70.320 is stuck unclean for 704.803040, current state >> > active+recovering, >> > last acting [277,101,218,49,304,412] >> > pg 70.320 is active+recovering, acting [277,101,218,49,304,412], 18 >> > unfound >> > >> > There is no indication of any problems with down OSDs or network issues >> > with >> > OSDs. >> > >> > Thanks, >> > Jeff >> > >> > >> > -- >> > >> > Jeffrey McDonald, PhD >> > Assistant Director for HPC Operations >> > Minnesota Supercomputing Institute >> > University of Minnesota Twin Cities >> > 599 Walter Library email: jeffrey.mcdonald@xxxxxxxxxxx >> > 117 Pleasant St SE phone: +1 612 625-6905 >> > Minneapolis, MN 55455 fax: +1 612 624-8861 >> > >> > >> > >> > _______________________________________________ >> > ceph-users mailing list >> > ceph-users@xxxxxxxxxxxxxx >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > > > > > -- > > Jeffrey McDonald, PhD > Assistant Director for HPC Operations > Minnesota Supercomputing Institute > University of Minnesota Twin Cities > 599 Walter Library email: jeffrey.mcdonald@xxxxxxxxxxx > 117 Pleasant St SE phone: +1 612 625-6905 > Minneapolis, MN 55455 fax: +1 612 624-8861 > > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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