Sorry I got confused! Do you mean that both recovery_op_priority and recovery_priority should be 63 to have a slow recovery? If so why the client op priority is default 63 and recovery op is 3? This means that by default recovery op is more prioritize than client op! In the link you share (Github one) It says that if priority is higher as an integer it will mean that it prioritizes others! Can you please clarify this, please? I think this should be documented as well in Ceph because in general, I think it means that a higher integer number means higher priority than a lower integer number and so if we set recovery op priority to 63 it will do recovery too fast and will impact the overall cluster performance! Thanks. On Wed, Dec 2, 2020 at 10:25 PM Anthony D'Atri <anthony.datri@xxxxxxxxx> wrote: > FWIW > https://github.com/ceph/ceph/blob/master/doc/dev/osd_internals/backfill_reservation.rst > has some discussion of op priorities, though client ops aren’t mentioned > explicitly. If you like, enter a documentation tracker and tag me and I’ll > look into adding that. > > > On Dec 2, 2020, at 9:56 AM, Stefan Kooman <stefan@xxxxxx> wrote: > > > > On 12/2/20 5:36 PM, Seena Fallah wrote: > >> If it uses PriorityQueue < > https://en.wikipedia.org/wiki/Priority_queue#:~:text=In%20computer%20science%2C%20a%20priority,an%20element%20with%20low%20priority.> > Data Structure an element with high priority should be dequeued before an > element with low priority. > > > > - osd client op priority > > The priority set for client operations. It is relative to osd recovery > op priority. > > > > The op priority for client io is (default) 63. So with that regard a > lower value should be lower priority. Same as the PriorityQueue you linked. > > > > A simple example would be a great way to take out any confusion. I'll > try to attend a "Docubetter" meeting to discuss this. > > > > Gr. Stefan > > _______________________________________________ > > 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 > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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