On 01/28/2014 10:08 AM, Graeme Lambert wrote: > Hi Karan, > > Surely this doesn't apply to all pools though? Several of the pools > created for the RADOS gateway have very small levels of objects and if I > set 256 PGs to all pools I would have warnings about the ratio of > objects to pgs. Within the formula [1] there is an assumption that all pools contain the same number of objects. That's nearly always not the case. And I question the 'power of 2' rule. Also to confirm is the value of 'the number of PGs should be a multiple of the number of OSDs'. If these rules can help they do so only to a certain extent. If they lead you to too many PGs then they can make things worse. For instance, going from 200 to 256 is too much of an increase IMO. [1]: number of PGs per pool = (number of OSDs) x 100 / (number of total object copies) /pm _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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