Hi, What version of Ceph is this? Which scheduler is in use? mClock or WPQ? $ ceph config show osd.0 osd_op_queue If the OSD's scheduler is mClock then unless you set osd_mclock_override_recovery_settings to true (not recommended), changing osd_max_backfills and osd_recovery_max_active will have no impact. mClock requires using profiles. Read this [1]. Regards, Frédéric. [1] https://docs.ceph.com/en/reef/rados/configuration/mclock-config-ref/?#recovery-backfill-options ----- Le 31 Jan 25, à 8:25, Jaemin Joo jm7.joo@xxxxxxxxx a écrit : > Hi, all > > I am suffering from slow backfilling and recovering. > I increased to "max_backfills" = 64, "recovery_max_actives" = 64. I know > it's unnessary to increase more in my ceph cluster. > When I checked pg query, I found the number of > "backfills_in_flight"&"recovering" is 4. > I set "osd_recovery_max_single_start = 4" so I think > "osd_recovery_max_single_start" affects to the number of > "backfills_in_flight"&"recovering". > I increased to "osd_recovery_max_single_start = 16" but the number of > "backfills_in_flight"&"recovering" in pg query was not changed. > I know "osd_recovery_max_single_start" runtime is true. > Should I restart the osds to increase the number of > "backfills_in_flight"&"recovering"? or Is there the other way? > _______________________________________________ > 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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