On 5/14/20 1:27 PM, Kees Meijs wrote:
Thank you very much. That's a good question.

The implementations of OpenStack and Ceph and "the other" OpenStack and
Ceph are, apart from networking, completely separate.

Actually I was thinking you perform OpenStack and Ceph upgrade, not migration to other OpenStack and other Ceph.

If downtime is acceptable I will suggest to use `qemu-img convert` instead rbd import/export, because:

* this copy from one cluster to another;

* speed up-to 3Gbit/s (my maximum from qemu network stack in 2018);

qemu-img convert -m 16 -W -p -n -f raw -O raw \

rbd:<from_your_pool>/<your_volume>:id=cinder:key=<cinder_key>:mon_host=172.16.16.2 \

rbd:<to_your_pool>/<your_volume>:id=cinder:key=<cinder_key>:mon_host=172.16.17.2




k

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