[ceph-users] Reducing Max_mds

John Spray jspray at redhat.com
Tue Oct 30 02:26:40 PDT 2018


On Tue, Oct 30, 2018 at 6:36 AM Rhian Resnick <rresnick at fau.edu> wrote:
>
> Evening,
>
>
> I am looking to decrease our max mds servers as we had a server failure and need to remove a node.
>
>
> When we attempt to decrease the number of mds servers from 5 to 4 (or any other number) they never transition to standby. They just stay active.
>
>
> ceph fs set cephfs max_mds X

After you decrease max_mds, use "ceph mds deactivate <rank>" to bring
the actual number of active daemons in line with your new intended
maximum.

>From Ceph 13.x that happens automatically, but since you're on 12.x it
needs doing by hand.

John

>
> Nothing looks useful in the mds or mon logs and I was wondering what you recommend looking at?
>
>
> We are on 12.2.9 running Centos.
>
>
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