PG Ratio for EC overwrites Pool

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Dear Ceph'ers,

I am wondering on how to choose the number of PGs for a RBD-EC-Pool.

To be able to use RBD-Images on a EC-Pool, it needs to have an regular RBD-replicated-pool, as well as an EC-Pool with EC overwrites enabled, but how many PGs would you need for the RBD-replicated-pool. It doesn't seem to eat a lot of storage, so if I'm not mistaken, it could be actually a quite low number of PGs, but is this recommended? Is there a best practice for this?


Best

Ken

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