Fwd: pools without rules

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Hi all -

I posted this question to the ceph-user list a few days ago but no one
responded, so I thought I'd send it to the devel list too:

What happens if I create a pool and associated it with a ruleset (say,
set '2', for instance), and then I remove all the rules from set '2'?

Similarly, what happens if I add a single rule to ruleset 2 that's
size-constrained to pools of size 2 - 3, but then create a replicated
pool of size 4 using that ruleset?

Is there a fundamental rule that ceph uses (e.g., random selection) to
choose osds on which to store the replicas?

Thanks,
John
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