There used to be, can't find it right now. Something like 'ceph osd set pg_num <num>' then 'ceph osd set pgp_num <num>' to actually move your data into the new pg's. I successfully did it several months ago, when bobtail was current. Sent from my iPad > On Oct 9, 2013, at 10:30 PM, Guang <yguang11@xxxxxxxxx> wrote: > > Thanks Mike. > > Is there any documentation for that? > > Thanks, > Guang > >> On Oct 9, 2013, at 9:58 PM, Mike Lowe wrote: >> >> You can add PGs, the process is called splitting. I don't think PG merging, the reduction in the number of PGs, is ready yet. >> >>> On Oct 8, 2013, at 11:58 PM, Guang <yguang11@xxxxxxxxx> wrote: >>> >>> Hi ceph-users, >>> Ceph recommends the PGs number of a pool is (100 * OSDs) / Replicas, per my understanding, the number of PGs for a pool should be fixed even we scale out / in the cluster by adding / removing OSDs, does that mean if we double the OSD numbers, the PG number for a pool is not optimal any more and there is no chance to correct it? >>> >>> >>> Thanks, >>> Guang >>> _______________________________________________ >>> ceph-users mailing list >>> ceph-users@xxxxxxxxxxxxxx >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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