Re: Multiple backend pools on the same cacher tier pool ?

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> -----Original Message-----
> From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of
> Haomai Wang
> Sent: 13 May 2016 15:00
> To: Florent B <florent@xxxxxxxxxxx>
> Cc: Ceph Users <ceph-users@xxxxxxxxxxxxxx>
> Subject: Re:  Multiple backend pools on the same cacher tier
> pool ?
> 
> On Fri, May 13, 2016 at 8:11 PM, Florent B <florent@xxxxxxxxxxx> wrote:
> > Hi everyone,
> >
> > I would like to setup Ceph cache tiering and I would like to know if I
> > can have a single cache tier pool, used as "hot storage" for multiple
> > backend pools ?
> 
> no, we can't. I think it's too complexity to implement this in current
cache tier
> design

Technically correct, but I am guessing the OP is thinking of an actual pool
of SSD's, rather than a Ceph pool.

So to give a slightly different answer, no 1 cache pool can't tier multiple
base pools. But multiple cache pools could be created on the same set of
SSD's to accomplish this, keeping in mind available space.

> 
> >
> > Documentation only takes example with a single backend pool, or I
> > didn't find the information.
> >
> > Thank you.
> >
> > Florent
> > _______________________________________________
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> > ceph-users@xxxxxxxxxxxxxx
> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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