Nir, exactly!
Different data center (physical) - As I said, in addition to limitations of network
connections and latency, different subnets/vlans and different storage technologies.
In this case, one suggestion would be to allow Live Storage Migrate through the management
interface (ovirtmgmt), assuming that there is routing/connection between data centers
managed by the same Engine/Manager - the storage domain layer would be abstracted at that
point, but it would be allowed to copy a disk between different storage domains, in
different physical/logical data centers.
At the end of the process, a pause could be made on the VM for the process to be
successfully terminated and there is no data interruption/corruption.
I don't know if I'm being clear. it would only be a suggestion for this to be
implemented, because currently XenServer/XCP and VMWare are able to perform this type of
migration.
It is an important feature and that many users miss when they migrate to the Virt.