On 3/30/21 3:00 PM, Thomas Hukkelberg wrote:
Any thoughts or insight on how to achieve this with minimal data movement and
risk of cluster downtime would be welcome!
I would do so with Dan's "upmap-remap" script [1]. See [2] for his
presentation. We have used that quite a few times now (also to do
cluster expansions) and it works great. Especially that you can "pause"
any movement and obtain "HEALTH_OK" are really nice benefits.
Gr. Stefan
[1]:
https://github.com/HeinleinSupport/cern-ceph-scripts/blob/master/tools/upmap/upmap-remapped.py
[2]:
https://www.slideshare.net/Inktank_Ceph/ceph-day-berlin-mastering-ceph-operations-upmap-and-the-mgr-balancer
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