stretched cluster new pool and second pool with nvme

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hi ... running against the wall, i need your help, again.

our test stretched cluster is running fine.
now i have 2 questions.

whats the right way to add another pool?
create pool with 4/2 and use the rule for the stretched mode, finished?
the exsisting pools were automaticly set to 4/2 after "ceph mon enable_stretch_mode".

the second question, we want to use ssd and nvme together.
so, we need to have a second pool for class nvme.

i don't know, how to setup a second crush rule for the nvme class.
i thought, that i need to filter with 2 rules for the classes. is that correct?


thanks for help,
ronny
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