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" <mgiamma...@gmail.com> To: "Artyom Lukianov" <aluki...@redhat.com> Cc: users@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 <aluki...@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" <mgiamma...@gmail.com> > To: "Artyom Lukianov" <aluki...@redhat.com> > Cc: users@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 <aluki...@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" <mgiamma...@gmail.com> > > To: users@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 > > > > _______________________________________________ > > Users mailing list > > Users@ovirt.org > > http://lists.ovirt.org/mailman/listinfo/users > > > _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
