It's pretty common to see way more writes than reads if you got lots of idle VMs Paul -- Paul Emmerich Looking for help with your Ceph cluster? Contact us at https://croit.io croit GmbH Freseniusstr. 31h 81247 München www.croit.io Tel: +49 89 1896585 90 On Mon, Oct 14, 2019 at 6:34 PM Ingo Schmidt <i.schmidt@xxxxxxxxxxx> wrote: > > Great, this helped a lot. Although "ceph iostat" didn't give iostats of single images, but just general overview of IO, i remembered the new nautilus RDB performance monitoring. > > https://ceph.com/rbd/new-in-nautilus-rbd-performance-monitoring/ > > With a "simple" > >rbd perf image iotop > i was able to see that the writes indeed are from the Log Server and the Zabbix Monitoring Server. I didn't expect that it would cause that much I/O... unbelieveable... > > ----- Ursprüngliche Mail ----- > Von: "Ashley Merrick" <singapore@xxxxxxxxxxxxxx> > An: "i schmidt" <i.schmidt@xxxxxxxxxxx> > CC: "ceph-users" <ceph-users@xxxxxxx> > Gesendet: Montag, 14. Oktober 2019 15:20:46 > Betreff: Re: Constant write load on 4 node ceph cluster > > Is the storage being used for the whole VM disk? > > If so have you checked none of your software is writing constant log's? Or something that could continuously write to disk. > > If your running a new version you can use : [ https://docs.ceph.com/docs/mimic/mgr/iostat/ | https://docs.ceph.com/docs/mimic/mgr/iostat/ ] to locate the exact RBD image. > > > > > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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