Hi Frank,

Which objects are large? (You should see this in ceph.log when the
large obj was detected).

-- dan

On Wed, Aug 25, 2021 at 12:27 PM Frank Schilder <fr...@dtu.dk> wrote:
>
> Hi all,
>
> I have the notorious "LARGE_OMAP_OBJECTS: 4 large omap objects" warning and 
> am again wondering if there is any proper action one can take except "wait it 
> out and deep-scrub (numerous ceph-users threads)" or "ignore 
> (https://docs.ceph.com/en/latest/rados/operations/health-checks/#large-omap-objects)".
>  Only for RGWs is a proper action described, but mine come from MDSes. Is 
> there any way to ask an MDS to clean up or split the objects?
>
> The disks with the meta-data pool can easily deal with objects of this size. 
> My question is more along the lines: If I can't do anything anyway, why the 
> warning? If there is a warning, I would assume that one can do something 
> proper to prevent large omap objects from being born by an MDS. What is it?
>
> Best regards,
> =================
> Frank Schilder
> AIT Risø Campus
> Bygning 109, rum S14
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