The osds are continuously flapping up/down due to the slow MDS metadata IOs
..
what is causing the slow MDS metadata IOs ?
currently, there are 2 mds and 3 monitors deployed ..
would it help to just one mds and one monitor ?
thanks!
On Tue, Oct 5, 2021 at 1:42 PM Eugen Block <ebl...@nde.ag> wrote:
> All your PGs are inactive, if two of four OSDs are down and you
> probably have a pool size of 3 then no IO can be served. You’d need at
> least three up ODSs to resolve that.
>
>
> Zitat von Abdelillah Asraoui <aasra...@gmail.com>:
>
> > Ceph is reporting warning on slow metdataIOs on one of the MDS server,
> > this is
> >
> > a new cluster with no upgrade..
> >
> > Anyone has encountered this and is there a workaround ..
> >
> > ceph -s
> >
> > cluster:
> >
> > id: 801691e6xx-x-xx-xx-xx
> >
> > health: HEALTH_WARN
> >
> > 1 MDSs report slow metadata IOs
> >
> > noscrub,nodeep-scrub flag(s) set
> >
> > 2 osds down
> >
> > 2 hosts (2 osds) down
> >
> > Reduced data availability: 97 pgs inactive, 66 pgs peering,
> 53
> > pgs stale
> >
> > Degraded data redundancy: 31 pgs undersized
> >
> > 2 slow ops, oldest one blocked for 30 sec, osd.0 has slow ops
> >
> >
> >
> > services:
> >
> > mon: 3 daemons, quorum a,c,f (age 15h)
> >
> > mgr: a(active, since 17h)
> >
> > mds: myfs:1 {0=myfs-a=up:creating} 1 up:standby
> >
> > osd: 4 osds: 2 up (since 36s), 4 in (since 10h)
> >
> > flags noscrub,nodeep-scrub
> >
> >
> >
> > data:
> >
> > pools: 4 pools, 97 pgs
> >
> > objects: 0 objects, 0 B
> >
> > usage: 1.0 GiB used, 1.8 TiB / 1.8 TiB avail
> >
> > pgs: 100.000% pgs not active
> >
> > 44 creating+peering
> >
> > 31 stale+undersized+peered
> >
> > 22 stale+creating+peering
> >
> >
> >
> > progress:
> >
> > Rebalancing after osd.2 marked in (10h)
> >
> > [............................]
> >
> > Rebalancing after osd.3 marked in (10h)
> >
> > [............................]
> >
> >
> > Thanks!
> > _______________________________________________
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> > To unsubscribe send an email to ceph-users-le...@ceph.io
>
>
>
>
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