Re: Very unbalanced storage

[Andrew Thompson <andrewkt@aktzero.com>]

On 8/31/2012 11:05 PM, Sage Weil wrote:
> Sadly you can't yet adjust pg_num for an active pool.  You can create a
> new pool,
>
> 	ceph osd pool create <name> <pg_num>
>
> I would aim for 20 * num_osd, or thereabouts.. see
>
> 	http://ceph.com/docs/master/ops/manage/grow/placement-groups/
>
> Then you can copy the data from the old pool to the new one with
>
> 	rados cppool yunio2 yunio3
>
> This won't be particularly fast, but it will work.  You can also do
>
> 	ceph osd pool rename <oldname> <newname>
> 	ceph osd pool delete <name>
>
> I hope this solves your problem!

Looking at old archives, I found this thread which shows that to mount a 
pool as cephfs, it needs to be added to mds:

http://permalink.gmane.org/gmane.comp.file-systems.ceph.devel/5685

I started a `rados cppool data tempstore` a couple hours ago. When it 
finishes, will I need to remove the current pool from mds somehow(other 
than just deleting the pool)?

Is `ceph mds add_data_pool <poolname>` still required? (It's not listed 
in `ceph --help`.)

Thanks.

-- 
Andrew Thompson
http://aktzero.com/