Hi All,
I'm going to be adding a bunch of OSDs to our cephfs cluster shortly
(increasing the total size by 50%). We're on reef, and will be
deploying using the cephadm method, and the OSDs are exactly the same
size and disk type as the current ones.
So, after adding the new OSDs, my understanding is that ceph will begin
rebalancing the data. I will also probably want to increase my PGs to
accommodate the new OSDs being added. My question is basically: should
I wait for the rebalance to finish before increasing my PG count? Which
would kick off another relabance action for the new PGs? Or, should I
increase the PG count as soon as the rebalance action starts after
adding the new OSDs, and it would then create new PGs and rebalance on
the new OSDs at the same time?
Thanks for any guidance!
-erich
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