Just looking at the release notes, using anything 'older' in the case of 4.4 seems
very rough going...
Testing 4.4 was actually how I got into the nesting domain this time around, because I
didn't have physical hardware left for another HCI cluster.
Testing of oVirt 4.4 on top of oVirt 4.3 including migration scenarios is probably the
most sensible use of nesting overall....
Alas I had similarly bad luck during my first evaluation of oVirt about a year (or two?)
ago, when I tried nesting oVirt on top of a big windows workstation with VMware
Workstation: Everything seemed to work just fine, but nested VMs just stopped right at
boot, without any error, but also no progress.
I had a vSphere cluster run no problem on that setup...