[ovirt-users] Ovirt and power saving

[Artyom Lukianov]

I don't think that suspend vm somehow affect on power saving, because suspend vm not generate cpu load on host. So if you have two vms and two hosts, when you suspend vms, engine will shutdown all hosts(if HostsInReserve=0), so it can be good idea to set this parameter equal to 1, to have at least one host up if you need to run vms.
Best regards

----- Original Message -----
From: "Mario Giammarco" <mgiammarco at gmail.com>
To: "Artyom Lukianov" <alukiano at redhat.com>
Cc: users at ovirt.org
Sent: Tuesday, January 13, 2015 5:22:59 PM
Subject: Re: [ovirt-users] Ovirt and power saving

I mean that I know that I can set a power saving policy, it is a very nice
thing.
I need to be sure that I can pause/suspend (not shutdown) virtual machines.
I also need that, if I suspend enough virtual machines ovirt shutdowns
server to save power following the power save policy.

Otherwise is it possible to manually shutdown a server forcing ovirt to
migrate vms to the only one powered up?

Basically it is a "manual power saving" mode.

Thanks again,
Mario

2015-01-13 14:21 GMT+01:00 Artyom Lukianov <alukiano at redhat.com>:

> Not really understand you, what you mean by "you can pause vm and so
> trigger the low
> utilization parameter"?
>
> ----- Original Message -----
> From: "Mario Giammarco" <mgiammarco at gmail.com>
> To: "Artyom Lukianov" <alukiano at redhat.com>
> Cc: users at ovirt.org
> Sent: Tuesday, January 13, 2015 3:05:06 PM
> Subject: Re: [ovirt-users] Ovirt and power saving
>
> Thanks for reply.
> I just want now to  be sure that you can pause vm and so trigger the low
> utilization parameter
>
> 2015-01-13 12:45 GMT+01:00 Artyom Lukianov <alukiano at redhat.com>:
>
> > We have power saving policy that also have possibility to poweroff
> > hosts(via power management), you can configure power saving policy
> > parameters for you purpose(HighUtilization can have values from 50-100
> and
> > LowUtilization 0-49), so you can set LowUtilization=0 and
> > HighUtilization=50, so load balancing will try migrate all vms on one
> > host(if cpu utilization less that 50). And also you can set parameter
> > "HostsInReserve" to 0 if you do not want additional hosts in reserve.
> >
> > ----- Original Message -----
> > From: "Mario Giammarco" <mgiammarco at gmail.com>
> > To: users at ovirt.org
> > Sent: Tuesday, January 13, 2015 1:30:38 PM
> > Subject: [ovirt-users] Ovirt and power saving
> >
> > Hello,
> > I would like to ask if it is possible to do this use case with ovirt:
> >
> > 1) two servers powered on
> > 2) operator suspend some virtual machines
> > 3) load falls down
> > 4) ovirt shutdown one server
> >
> > Then operator unpauses virtual machines and ovirt starts again the 2nd
> > server.
> >
> > Thanks,
> > Mario
> >
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> >
>