Hi all, we are using 16T and 18T spinning drives as OSDs and I'm observing that they are not scrubbed as often as I would like. It looks like too few scrubs are scheduled for these large OSDs. My estimate is as follows: we have 852 spinning OSDs backing a 8+2 pool with 2024 and an 8+3 pool with 8192 PGs. On average I see something like 10PGs of pool 1 and 12 PGs of pool 2 (deep) scrubbing. This amounts to only 232 out of 852 OSDs scrubbing and seems to be due to a conservative rate of (deep) scrubs being scheduled. The PGs (dep) scrub fairly quickly. I would like to increase gently the number of scrubs scheduled for these drives and *not* the number of scrubs per OSD. I'm looking at parameters like: osd_scrub_backoff_ratio osd_deep_scrub_randomize_ratio I'm wondering if lowering osd_scrub_backoff_ratio to 0.5 and, maybe, increasing osd_deep_scrub_randomize_ratio to 0.2 would have the desired effect? Are there other parameters to look at that allow gradual changes in the number of scrubs going on? Thanks a lot for your help! ================= Frank Schilder AIT Risø Campus Bygning 109, rum S14 _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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