Ah ok, Great !

I was just a bit worried about upgrade.

Thanks for your response sage !

----- Mail original -----
De: "Sage Weil" <s...@newdream.net>
À: "aderumier" <aderum...@odiso.com>
Cc: "ceph-users" <ceph-users@lists.ceph.com>
Envoyé: Lundi 9 Février 2015 07:11:46
Objet: Re: [ceph-users] crush tunables : optimal : upgrade from firefly to 
hammer behaviour ?

On Mon, 9 Feb 2015, Alexandre DERUMIER wrote: 
> Hi, 
> 
> I'm currently use crush tunables "optimal" value. 
> 
> If I upgrade from firefly to hammer, does the optimal value will upgrade 
> to optimal values for hammer. 

The tunables won't change on upgrade, and optimal on firefly != optimal on 
hammer. In fact, 'optimal' on firefly is the same as 'firefly' (on 
firefly or hammer). 

> So, does my clients (qemu-librbd) need to be also upgraded to hammer to 
> support new hammer features ? 
> 
> 
> If yes, 

Yes, but you won't need those features until you do upgrade mons and set 
tunables to 'hammer' or (hammer) 'optimal'. 

s 

> 
> I think to: 
> 
> 
> - change crush tunables to firefly 
> - upgrade firefly cluster to hammer cluster 
> - upgrade all my clients to hammer. (with qemu live migration, to have new 
> qemu process with last hammer librbd) 
> - change crush tunables to hammer 



> 
> 
> Is it the right way ? 
> _______________________________________________ 
> ceph-users mailing list 
> ceph-users@lists.ceph.com 
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com 
> 
> 

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