> -----Original Message----- > From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of > Laszlo Budai > Sent: 11 March 2017 13:51 > To: ceph-users <ceph-users@xxxxxxxxxxxxxx> > Subject: osd_disk_thread_ioprio_priority help > > Hello, > > > Can someone explain the meaning of osd_disk_thread_ioprio_priority. I'm > reading the definition from this page: > https://access.redhat.com/documentation/en- > us/red_hat_ceph_storage/1.3/html/configuration_guide/osd_configuration_ > reference > it says: "It sets the ioprio_set(2) I/O scheduling priority of the disk thread > ranging from 0 (highest) to 7 (lowest)." What is the so called disk thread? > > Then I found documents using both extreme values (0 and 7) for achieving > the same stuff make the scrubbing low priority. > https://ceph.com/geen-categorie/ceph-reduce-osd-scrub-priority/ and > http://dachary.org/?p=3268 are using the value 7 for reducing the priority of > scrub, while here: http://ceph-users.ceph.narkive.com/AMMP3r5s/osd- > scrub-sleep-osd-scrub-chunk-min-max and > https://indico.cern.ch/event/588794/contributions/2374222/attachments/13 > 83112/2103509/Configuring_Ceph.pdf the value 0 is used. > > Now I am confused .... :( > > Can somebody bring some light here? Only to confuse you some more. If you are running Jewel or above then scrubbing is now done in the main operation thread and so setting this value will have no effect. > > Thank you, > Laszlo > > _______________________________________________ > 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
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