Hi,

On 27 Jun 2023, at 18:31, Rok Jaklič <rjaklic@gmail.com> wrote:

I want to place an existing pool with data to ssd-s.

I've created crush rule: ceph osd crush rule create-replicated replicated_ssd default host ssd

If I apply this rule to the existing pool default.rgw.buckets.index with 180G of data with command: ceph osd pool set default.rgw.buckets.index crush_rule replicated_ssd

Will the rgw/cluster be available in the meantime while the cluster moves data?

Yes