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@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

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