Just found and read this article that KVM should support storage migration


It is over 4 years old but is is a great start.

"KVM and Libvirt now support a performant way to live migrate virtual machines with no shared storage between the hosts. A running VM and it's disk images are relocated to a new machine with no downtime. "

Sure would like to know if the SUSE dev team know about this and will implement this in a future release (like SLES 15).

I know MS Hyper-V can do live storage migration. Can VMWare? Other Hypervisors?