Re: CephFS ghost usage/inodes

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Please try flushing the journal:

ceph daemon mds.foo flush journal

The problem may be caused by this bug: https://tracker.ceph.com/issues/43598

As for what to do next, you would likely need to recover the deleted
inodes from the data pool so you can retry deleting the files:
https://docs.ceph.com/docs/master/cephfs/disaster-recovery-experts/#recovery-from-missing-metadata-objects


On Tue, Jan 14, 2020 at 9:30 AM Oskar Malnowicz
<oskar.malnowicz@xxxxxxxxxxxxxx> wrote:
>
> Hello Patrick,
>
>     "purge_queue": {
>         "pq_executing_ops": 0,
>         "pq_executing": 0,
>         "pq_executed": 5097138
>     },
>
> We already restarted the MDS daemons, but no change.
> There are no other health warnings than that one what Florian already
> mentioned.
>
> cheers Oskar
>
> Am 14.01.20 um 17:32 schrieb Patrick Donnelly:
> > On Tue, Jan 14, 2020 at 5:15 AM Florian Pritz
> > <florian.pritz@xxxxxxxxxxxxxx> wrote:
> >> `ceph daemon mds.$hostname perf dump | grep stray` shows:
> >>
> >>> "num_strays": 0,
> >>> "num_strays_delayed": 0,
> >>> "num_strays_enqueuing": 0,
> >>> "strays_created": 5097138,
> >>> "strays_enqueued": 5097138,
> >>> "strays_reintegrated": 0,
> >>> "strays_migrated": 0,
> > Can you also paste the purge queue ("pq") perf dump?
> >
> > It's possible the MDS has hit an ENOSPC condition that caused the MDS
> > to go read-only. This would prevent the MDS PurgeQueue from cleaning
> > up. Do you see a health warning that the MDS is in this state? Is so,
> > please try restarting the MDS.
> >
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--
Patrick Donnelly, Ph.D.
He / Him / His
Senior Software Engineer
Red Hat Sunnyvale, CA
GPG: 19F28A586F808C2402351B93C3301A3E258DD79D
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