= Features/Virt Storage Migration =
Feature owner(s): Cole Robinson <crobinso(a)redhat.com>, Paolo Bonzini
Migrate a running virtual machine from one host to another, including in use
storage, with no downtime. No need for a shared storage location between the
== Detailed description ==
Live migration of a VM has been around for a while, but usage historically
required that VM storage disk images were shared between the source and
destination host, and mounted in the same location.
Since qemu 0.12 (December 2009), there has been a storage migration feature in
qemu, but it was inflexible, and inefficient to the point that any workload in
the guest would often prevent the guest from ever being full migrated. While
supported in libvirt/virsh, it was still difficult to use, requiring stub disk
images to be present on the destination host.
New developments in QEMU allow migrating a VM with no shared storage between
the source and destination, and does it in a performant manner.