Re: Troubleshooting stuck unclean PGs?

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Hi Matt,

On 9/22/20 5:44 AM, Matt Larson wrote:

I tried this:

`sudo ceph tell 'osd.*' injectargs '--osd-max-backfills 4'`

Which has increased to having 10 simultaneous backfills and a higher
10X higher rate of data movements. It looks like I could increase this
further by increasing the number of simultaneous recovery operations,
but changing that parameter to 20 didn't cause a change. The command
warned that OSDs may need to be restarted before this takes effect:

sudo ceph tell 'osd.*' injectargs '--osd-recovery-max-active 20'

I'll let it run overnight with a higher backfill rate and see if that
is sufficient to let the cluster catch up.

The commands are from
(http://lists.ceph.com/pipermail/ceph-users-ceph.com/2018-January/023844.html)

Alternatively, you could have used the Dashboard's OSD Recovery Priority Feature (see screen shot) ;)

Lenz

--
SUSE Software Solutions Germany GmbH - Maxfeldstr. 5 - 90409 Nuernberg
GF: Felix Imendörffer, HRB 36809 (AG Nürnberg)

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