On Wed, Sep 25, 2013 at 8:44 PM, Sage Weil <s...@inktank.com> wrote: > On Wed, 25 Sep 2013, Aaron Ten Clay wrote: > > Hi all, > > > > Does anyone know how to specify which pool the mds and CephFS data will > be > > stored in? > > > > After creating a new cluster, the pools "data", "metadata", and "rbd" all > > exist but with pg count too small to be useful. The documentation > indicates > > the pg count can be set only at pool creation time, > > This is no longer true. Can you tell us where you read it so we can fix > the documentation? > > ceph osd pool set data pg_num 1234 > ceph osd pool set data pgp_num 1234 > > Repeat for metadata and/or rbd with an appropriate pg count. >
Thanks! Maybe I just misinterpreted the documentation. The page http://ceph.com/docs/master/rados/operations/placement-groups/ implies (to me, anyway) that the number of placement groups can't be changed once a pool is created. Under the "Set Pool Values" heading, pg_num isn't listed as an option. > > > so I am working under the assumption I must create a new pool with a > > larger pg count and use that for CephFS and the mds storage. > > You can also create additional data pools and map directories to them, but > this probably isn't what you need (yet). > > sage > > > -Aaron
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