Re: Clients failing to advance oldest client?

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It is recommended to disconnect the client first and then observe
whether the cluster's slow requests recover.

Erich Weiler <weiler@xxxxxxxxxxxx> 于2024年3月26日周二 05:02写道:
>
> Hi Y'all,
>
> I'm seeing this warning via 'ceph -s' (this is on Reef):
>
> # ceph -s
>    cluster:
>      id:     58bde08a-d7ed-11ee-9098-506b4b4da440
>      health: HEALTH_WARN
>              3 clients failing to advance oldest client/flush tid
>              1 MDSs report slow requests
>              1 MDSs behind on trimming
>
>    services:
>      mon: 5 daemons, quorum
> pr-md-01,pr-md-02,pr-store-01,pr-store-02,pr-md-03 (age 3d)
>      mgr: pr-md-01.jemmdf(active, since 3w), standbys: pr-md-02.emffhz
>      mds: 1/1 daemons up, 1 standby
>      osd: 46 osds: 46 up (since 3d), 46 in (since 2w)
>
>    data:
>      volumes: 1/1 healthy
>      pools:   4 pools, 1313 pgs
>      objects: 258.13M objects, 454 TiB
>      usage:   688 TiB used, 441 TiB / 1.1 PiB avail
>      pgs:     1303 active+clean
>               8    active+clean+scrubbing
>               2    active+clean+scrubbing+deep
>
>    io:
>      client:   131 MiB/s rd, 111 MiB/s wr, 41 op/s rd, 613 op/s wr
>
> I googled around and looked at the docs and it seems like this isn't a
> critical problem, but I couldn't find a clear path to resolution.  Does
> anyone have any advice on what I can do to resolve the health issues up top?
>
> My CephFS filesystem is incredibly busy so I have a feeling that has
> some impact here, but not 100% sure...
>
> Thanks as always for the help!
>
> cheers,
> erich
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