[ovirt-users] about CPU type

[Yaniv Kaul]

On Wed, Nov 9, 2016 at 12:10 PM, Nathanaël Blanchet <blanchet at abes.fr>
wrote:

> Hi all,
>
> I manage several hosts with different CPU type and I was wondering about
> good practices to create a cluster in ovirt.
>
> I usually choose the lowest level to gather my hosts, Sandy Bridge seems
> to be good. Is there for instance some performance advantage  to create a
> cluster per CPU type?
>
> I mean, if i decide to create an independant cluster with the Broadwell
> family, what kind of advantage could this stuff bring to me? I know I
> couldn't force live migrate my guests to a lower CPU type cluster, so
> advantage must be greater than disadvantage.
>

It means more CPU features from the host are exposed to the guest. If it
takes advantage of them is up to the guest and the applications within it.
For example, with Broadwell, you can get all the CPU features that are
in[1].

Y.

[1]
http://libvirt.org/git/?p=libvirt.git;a=blob;f=src/cpu/cpu_map.xml;h=6da8321a69681e7a78ade6b7c5c9c871813bd5d8;hb=HEAD#l1126



> thank you for help.
>
> --
> Nathanaël Blanchet
>
> Supervision réseau
> Pôle Infrastrutures Informatiques
> 227 avenue Professeur-Jean-Louis-Viala
> 34193 MONTPELLIER CEDEX 5
> Tél. 33 (0)4 67 54 84 55
> Fax  33 (0)4 67 54 84 14
> blanchet at abes.fr
>
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