Adding more OSDs or deleting/recreating pools that have too many PGs are your only 2 options to reduce the number of PG's per OSD. It is on the Ceph roadmap, but is not a currently supported feature. You can alternatively adjust the setting threshold for the warning, but it is still a problem you should address in your cluster.
On Mon, Oct 2, 2017 at 4:02 PM Jack <ceph@xxxxxxxxxxxxxx> wrote:
You cannot;
On 02/10/2017 21:43, Andrei Mikhailovsky wrote:
> Hello everyone,
>
> what is the safest way to decrease the number of PGs in the cluster. Currently, I have too many per osd.
>
> Thanks
>
>
>
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