Help with deep scrub warnings

[Nicola Mori <mori@xxxxxxxxxx>]

Dear Ceph users,

in order to reduce the deep scrub load on my cluster I set the deep 
scrub interval to 2 weeks, and tuned other parameters as follows:

# ceph config get osd osd_deep_scrub_interval
1209600.000000
# ceph config get osd osd_scrub_sleep
0.100000
# ceph config get osd osd_scrub_load_threshold
0.300000
# ceph config get osd osd_deep_scrub_randomize_ratio
0.100000
# ceph config get osd osd_scrub_min_interval
259200.000000
# ceph config get osd osd_scrub_max_interval
1209600.000000

In my admittedly poor knowledge of Ceph's deep scrub procedures, these 
settings should spread the deep scrub operations in two weeks instead of 
the default one week, lowering the scrub frequency and the related load. 
But I'm currently getting warnings like:

[WRN] PG_NOT_DEEP_SCRUBBED: 56 pgs not deep-scrubbed in time
    pg 3.1e1 not deep-scrubbed since 2024-02-22T00:22:55.296213+0000
    pg 3.1d9 not deep-scrubbed since 2024-02-20T03:41:25.461002+0000
    pg 3.1d5 not deep-scrubbed since 2024-02-20T09:52:57.334058+0000
    pg 3.1cb not deep-scrubbed since 2024-02-20T03:30:40.510979+0000
    . . .

I don't understand the first one, since the deep scrub interval should 
be two weeks so I don''t expect warnings for PGs which have been 
deep-scrubbed less than 14 days ago (at the moment I'm writing it's Tue 
Mar  5 07:39:07 UTC 2024).

Moreover, I don't understand why the deep scrub for so many PGs is 
lagging behind. Is there something wrong in my settings?

Thanks in advance for any help,

Nicola

Attachment: smime.p7s
Description: S/MIME Cryptographic Signature

_______________________________________________
ceph-users mailing list -- ceph-users@xxxxxxx
To unsubscribe send an email to ceph-users-leave@xxxxxxx