SUMMARY
It seems while attempting multiple volume migrations, the same KVM agent is always selected. This severely limits the scalability of doing bulk migrations as we are limited to serial processing at the CopyCommand and network limitations of a single hypervisor host.
STEPS TO REPRODUCE
Migrate multiple volumes simultaneously from one cluster to another. Observe which hypervisor is selected to execute these and whether they occur in parallel or block on each other.
SUMMARY
It seems while attempting multiple volume migrations, the same KVM agent is always selected. This severely limits the scalability of doing bulk migrations as we are limited to serial processing at the CopyCommand and network limitations of a single hypervisor host.
STEPS TO REPRODUCE
Migrate multiple volumes simultaneously from one cluster to another. Observe which hypervisor is selected to execute these and whether they occur in parallel or block on each other.