Re: Slow monitor responses for rbd ls etc.

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On Fri, Oct 7, 2022 at 7:53 AM Sven Barczyk <s.barczyk@xxxxxxxxxx> wrote:
>
> Hello,
>
>
>
> we are encountering a strange behavior on our Ceph. (All Ubuntu 20 / All
> mons Quincy 17.2.4 / Oldest OSD Quincy 17.2.0 )
> Administrative commands like rbd ls or create are so slow, that libvirtd is
> running into timeouts and creating new VMs on our Cloudstack, on behalf of
> creating new volumes on our pool, takes up to 10 mins.
>
> Already running VMs are not affected or showing slow responses on their
> Filesystem.
> It is really only limited if services needs to interact with rbd commands.
>
>
> Has anyone encountered some behavoir like this?

What leads you to believe it's the monitor being slow, rather than the
OSDs storing RBD data?
-Greg

>
>
> Regards
> Sven
>
>
>
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