On Wed, 4 Dec 2013, Stefan Priebe wrote: > Hi Sage, > > Am 04.12.2013 17:13, schrieb Sage Weil: > > Hi James, > > > > Can you generate an OSD log with 'debug filestore = 20' for an idle period? > > i had reported something very similiar with no result to zendesk (#702). Were you also seeing the ceph-osd process show up in iotop while idle? That's the bit that concerns me. sage > > Stefan > > > Thanks! > > sage > > > > > > > > James Harper <james.harper@xxxxxxxxxxxxxxxx> wrote: > > > > I have been testing osd on btrfs, and the first thing I notice is that > > there is constant write activity when idle. > > > > The write activity hovers between 5Mbytes/second and 30Mbytes/second, > > and averages around 9Mbytes/second (as determined by iostat -x 30). On > > average, iostat is showing around 90 w/s, and 25% util. > > > > There were two OSD's on this server running btrfs and both were behaving > > like this. I changed one back to xfs last night and it's not showing any > > write activity at idle now. > > > > There is no matching write activity on the journal device, but the high > > writes stop when I kill the OSD process. > > > > kworker, ceph-osd, and btrfs-cleaner processes feature highly in iotop > > > > Is this normal? And is it a problem, or just btrfs doing background > > writes for some reason? > > > > I'm running dumpling on Debian, fwiw. > > > > Thanks > > > > James > > > > ------------------------------------------------------------------------ > > > > ceph-users mailing list > > ceph-users@xxxxxxxxxxxxxx > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > > > -- > > Sent from Kaiten Mail. Please excuse my brevity. > > > > > > _______________________________________________ > > ceph-users mailing list > > ceph-users@xxxxxxxxxxxxxx > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |