On 07/12/2013 01:45 AM, Stefan Priebe - Profihost AG wrote:
Hello, is this calculation for the number of PGs correct? 36 OSDs, Replication Factor 3 36 * 100 / 3 => 1200 PGs But i then read that it should be an exponent of 2 so it should be 2048?
At large numbers of PGs it may not matter very much, but I don't think it would hurt either!
Basically this has to do with how ceph_stable_mod works. At non-power-of-two values, the bucket counts aren't even, but that's only a small part of the story and may ultimately only have a small effect on the distribution unless the PG count is small.
Stefan _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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