On Sun, Mar 12, 2017 at 9:07 PM, Laszlo Budai <laszlo@xxxxxxxxxxxxxxxx> wrote: > Hi Florian, > > thank you for your answer. > > We have already set the IO scheduler to cfq in order to be able to lower the > priority of the scrub operations. > My problem is that I've found different values set for the same parameter, > and in each case they were doing it in order to achieve the same thing as we > do. > This is why I was asking for some more details about this parameter. Is the > value 0 or 7 which will set the scrub to the lowest priority? I want my ceph > cluster to be responsive for the client requests, and do the scrub in the > background. > > I'm open to any ideas/suggestions which would help to improove the cluster's > responsiveness during deep scrub operations. I'm sorry, I may have worded that in a manner that's easy to misunderstand. I generally *never* suggest that people use CFQ on reasonably decent I/O hardware, and thus have never come across any need to set this specific ceph.conf parameter. Maybe if you share your full ceph.conf and hardware details, I or others on this list can offer more useful suggestions than tweaking osd_disk_thread_ioprio_priority. Cheers, Florian _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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