8 Oct
2019
8 Oct
'19
5:52 p.m.
You have 4 OSDs that are near_full, and the errors seem to be pointed
to pg_create, possibly from a backfill. Ceph will stop backfills to
near_full osds. I'm guessing that is the cause of your blocked IO. Try
reweighting the full OSDs down to move PGs off them.
----------------
Robert LeBlanc
PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1
On Tue, Oct 8, 2019 at 6:53 AM Thomas <74cmonty(a)gmail.com> wrote:
>
> Hi,
> ceph status reports:
> root@ld3955:~# ceph -s
> cluster:
> id: 6b1b5117-6e08-4843-93d6-2da3cf8a6bae
> health: HEALTH_ERR
> 1 filesystem is degraded
> 1 filesystem has a failed mds daemon
> 1 filesystem is offline
> insufficient standby MDS daemons available
> 4 nearfull osd(s)
> 1 pool(s) nearfull
> Reduced data availability: 59 pgs inactive, 16 pgs peering
> Degraded data redundancy: 597/153910758 objects degraded
> (0.000%), 2 pgs degraded, 1 pg undersized
> Degraded data redundancy (low space): 23 pgs backfill_toofull
> 1 pgs not deep-scrubbed in time
> 4 pgs not scrubbed in time
> 3 pools have too many placement groups
> 164 slow requests are blocked > 32 sec
> 1082 stuck requests are blocked > 4096 sec
> 1490 slow ops, oldest one blocked for 19711 sec, daemons
> [osd,0,osd,175,osd,186,osd,5,osd,6,osd,63,osd,68,osd,9,mon,ld5505,mon,ld5506]...
> have slow ops.
>
> services:
> mon: 3 daemons, quorum ld5505,ld5506,ld5507 (age 5h)
> mgr: ld5507(active, since 5h), standbys: ld5506, ld5505
> mds: pve_cephfs:0/1, 1 failed
> osd: 419 osds: 416 up, 416 in; 6024 remapped pgs
>
> data:
> pools: 6 pools, 8864 pgs
> objects: 51.30M objects, 196 TiB
> usage: 594 TiB used, 907 TiB / 1.5 PiB avail
> pgs: 0.666% pgs not active
> 597/153910758 objects degraded (0.000%)
> 52964415/153910758 objects misplaced (34.412%)
> 5954 active+remapped+backfill_wait
> 2786 active+clean
> 40 active+remapped+backfilling
> 35 activating
> 23 active+remapped+backfill_wait+backfill_toofull
> 16 peering
> 7 activating+remapped
> 1 activating+undersized+degraded
> 1 active+clean+scrubbing
> 1 active+recovering+degraded
>
> io:
> client: 3.5 KiB/s wr, 0 op/s rd, 0 op/s wr
> recovery: 551 MiB/s, 137 objects/s
>
> I'm concerned about the slow ops on osd.0 and osd.9.
> On the relevant OSD node I can see 2 relevant services running for hours:
> ceph 14795 1 99 09:58 ? 08:49:22 /usr/bin/ceph-osd -f
> --cluster ceph --id 9 --setuser ceph --setgroup ceph
> ceph 15394 1 99 09:58 ? 07:10:00 /usr/bin/ceph-osd -f
> --cluster ceph --id 0 --setuser ceph --setgroup ceph
>
> In the relevant osd log I can find similar messages:
> root@ld5505:~# tail -f /var/log/ceph/ceph-osd.0.log
> 2019-10-08 15:35:32.830 7ff60c7cc700 -1 osd.0 233323 get_health_metrics
> reporting 236 slow ops, oldest is osd_pg_create(e233257 38.0:199987)
> 2019-10-08 15:35:33.806 7ff60c7cc700 -1 osd.0 233323 get_health_metrics
> reporting 236 slow ops, oldest is osd_pg_create(e233257 38.0:199987)
> 2019-10-08 15:35:34.842 7ff60c7cc700 -1 osd.0 233323 get_health_metrics
> reporting 236 slow ops, oldest is osd_pg_create(e233257 38.0:199987)
> 2019-10-08 15:35:35.862 7ff60c7cc700 -1 osd.0 233323 get_health_metrics
> reporting 236 slow ops, oldest is osd_pg_create(e233257 38.0:199987)
>
> root@ld5505:~# tail -f /var/log/ceph/ceph-osd.9.log
> 2019-10-08 15:35:38.822 7f8957599700 -1 osd.9 233407 get_health_metrics
> reporting 818 slow ops, oldest is osd_op(client.53385387.0:23 30.f7
> 30.bcc140f7 (undecoded) ondisk+retry+read+known_if_redirected e233362)
> 2019-10-08 15:35:39.854 7f8957599700 -1 osd.9 233407 get_health_metrics
> reporting 818 slow ops, oldest is osd_op(client.53385387.0:23 30.f7
> 30.bcc140f7 (undecoded) ondisk+retry+read+known_if_redirected e233362)
> 2019-10-08 15:35:40.850 7f8957599700 -1 osd.9 233407 get_health_metrics
> reporting 818 slow ops, oldest is osd_op(client.53385387.0:23 30.f7
> 30.bcc140f7 (undecoded) ondisk+retry+read+known_if_redirected e233362)
> 2019-10-08 15:35:41.862 7f8957599700 -1 osd.9 233407 get_health_metrics
> reporting 818 slow ops, oldest is osd_op(client.53385387.0:23 30.f7
> 30.bcc140f7 (undecoded) ondisk+retry+read+known_if_redirected e233362)
>
> Question:
> How can I analyse and solve the issue with slow ops?
>
> THX
> _______________________________________________
> ceph-users mailing list -- ceph-users(a)ceph.io
> To unsubscribe send an email to ceph-users-leave(a)ceph.io