[ovirt-users] Mask the CPU model

[Punit Dambiwal]

Hi,

I don't want to faking a CPU model.....my main concern is to create the
homogeneous environment,so the guest can be migrate between hosts with
diffrent CPU (If i can change the CPU model with the custom name).



On Thu, Jun 26, 2014 at 7:48 PM, Michal Skrivanek <
michal.skrivanek at redhat.com> wrote:

>
> On Jun 26, 2014, at 13:42 , Sven Kieske <S.Kieske at mittwald.de> wrote:
>
> >
> >
> > Am 26.06.2014 13:28, schrieb Michal Skrivanek:
> >>
> >> On Jun 26, 2014, at 13:18 , Dan Kenigsberg <danken at redhat.com> wrote:
> >>
> >>> On Wed, Jun 25, 2014 at 11:19:17AM +0000, Sven Kieske wrote:
> >>>>
> >>>>
> >>>> Am 25.06.2014 11:43, schrieb Punit Dambiwal:
> >>>>> Hi Sven,
> >>>>>
> >>>>> Please let me know which VDSM hook can be used for the same,is there
> any
> >>>>> hook available for the same... ??
> >>>>
> >>>> I don't know any hook that does this, it should be relatively simple,
> >>>> though.
> >>>> Maybe someone else can assist, CC'ing Dan:
> >>>>
> >>>> Do you know of a hook that manipulates the emulated CPU model?
> >>>
> >>> Within the Vdsm code tree, only faqemu does that (and it only drops,
> >>> causing qemu to do its best). You can build on top of faqemu to set to
> >>> your favorite guest cpu.
> >>>
> >>> However, I think that Engine was once capable of setting a specific
> >>> cpuType - is it still possible without hacking its DB, Arik?
> >>
> >> I'm not sure what do you actually mean
> >> hide what from whom?
> >> the guest sees particular CPU, there's nothing like "Virtual xyz", it
> either sees flags matching e.g. Nehalem or not. You can select different
> CPU at the cluster level if you wish, and that's what the guest will see,
> regardless what your host has
> >>
> >> faqemu is changing the configured CPU type to fully emulated CPU…I
> don't think you meant that...
> >
> > I guess he refers to the cpu_model mentioned here:
> >
> http://docs.openstack.org/trunk/config-reference/content/list-of-compute-config-options.html
>
> yes, that's what we have at cluster level and there is an RFE for per-VM
> level
>
> >
> > But I still do not see the benefit of "faking" a certain cpu model.
>
> there is no faking, it is always real for the guest.
> so yes, you can make it look(and actually perform) less capable so you can
> migrate across heterogenous hosts; or make it less capable just if you wish
> so, but that's it.
>
> Thanks,
> michal
>
> >
> >
> > --
> > Mit freundlichen Grüßen / Regards
> >
> > Sven Kieske
> >
> > Systemadministrator
> > Mittwald CM Service GmbH & Co. KG
> > Königsberger Straße 6
> > 32339 Espelkamp
> > T: +49-5772-293-100
> > F: +49-5772-293-333
> > https://www.mittwald.de
> > Geschäftsführer: Robert Meyer
> > St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad
> Oeynhausen
> > Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad
> Oeynhausen
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ovirt.org/pipermail/users/attachments/20140627/c53cbb7d/attachment-0001.html>