[libvirt] How to keep VM definitions in sync across hosts?

Hi, is there any best-practice how to keep VM definitions in sync across a couple of hosts? Is it reasonable to put /etc/libvirt/qemu/ on a NFS share? Or are there better ways? How does oVirt solve that? I'm asking because I'm currently setting up a four node "cluster" with KVM and libvirt. Previously, with Xen, I used libvirt only for changing currently running VMs (setmem, migrate etc.), but with KVM, I'd like to use libvirt the way it is intented to ;-) So I assume that VM definitions are required to be available and in sync among all nodes for doing live migration. I don't want to rsync them or wrap the virsh URI edit inside a for-loop, as I assume there are better ways? I'd like to do virsh URI edit once and have the changes propagated automagically. kr,tom