On Wednesday, August 28, 2013, daniel pol wrote:
> I don't recall. It might be that I started with PG=2.
> Trying get an even distribution of PGs accros my 2 OSDs now. Tried
> different numbers (keeping pgp_num same as pg_num :) but I keep getting one
> OSD with more PGs compared to the other. Since this is just for
> learning/testing I would like to somehow make it evenly distributed. What's
> the easiest/quickest way to accomplish that ? (if possible)
>
Distribution is entirely pseudorandom, so there's not a command to
force-balance or anything. If you set it to 200 PGs with pgp_num 200 I
doubt you'll notice a big difference in the distribution though --
especially since with two nodes they'll both get all data!
> Also, is there a command to show the space used on each OSD by each pool ?
> I found the space by pool, or by OSD, but no easy way to combine the 2 ways
> of looking at space used
>
Nope, sorry. That kind of detail is a bit counter to the point of using
Ceph!
-Greg
>
>
> Have a nice day,
> Dani
>
> > Date: Wed, 28 Aug 2013 13:28:29 -0700
> > Subject: Re: [ceph-users] Reading from replica
> > From: g...@inktank.com <javascript:_e({}, 'cvml', 'g...@inktank.com');>
> > To: daniel_...@hotmail.com <javascript:_e({}, 'cvml',
> 'daniel_...@hotmail.com');>
> > CC: ceph-users@lists.ceph.com <javascript:_e({}, 'cvml',
> 'ceph-users@lists.ceph.com');>
> >
> > On Wed, Aug 28, 2013 at 1:22 PM, daniel pol
> > <daniel_...@hotmail.com<javascript:_e({}, 'cvml',
> > 'daniel_...@hotmail.com');>>
> wrote:
> > > Sorry, my bad. Only my second post and forgot the "reply all"
> > >
> > > Thanks for the info. I'm looking at the impact of pg number on
> performance.
> > > Just trying to learn more about how Ceph works.
> > > I didn't set pgp_num. It came by default with 2 in my case.
> >
> > Did you start the pool with 2 PGs? If not, that's...odd. You can
> > update it with "ceph osd pool set" (see
> > http://ceph.com/docs/master/rados/operations/control/).
> > -Greg
> > Software Engineer #42 @ http://inktank.com | http://ceph.com
>
--
Software Engineer #42 @ http://inktank.com | http://ceph.com
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