Thank you Matt, Etienne, and Frank for your great advice. I'm going to
set up a small test cluster to familiarize myself with the process
before making the change on my production environment. Thank you all
again, I really appreciate it!
Jason
On 2022-02-21 17:58, Jason Borden wrote:
> Hi all,
>
> I'm looking for some advice on reducing my ceph cluster in half. I
> currently have 40 hosts and 160 osds on a cephadm managed pacific
> cluster. The storage space is only 12% utilized. I want to reduce the
> cluster to 20 hosts and 80 osds while keeping the cluster operational.
> I'd prefer to do this in as few operations as possible instead of
> draining each host at a time and having to rebalance pgs 20 times. I
> think I should probably half the number of pgs at the same time too.
> Does anyone have any advice on how I can safely achieve this?
>
> Thanks,
> Jason
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