libvirt users - Feb 2013 - migrate vm images to new storage pool

I am searching for directions for using live block migration to copy
running vm's to a different storage pool.


Example: VM1 running on HOST1, the image(s) for VM1 are stored in
/var/lib/libvirt/images. I'd like to copy the disk image(s) that VM1
is using to /nfs/images. Without stopping/pausing/powering down the
VM.

Regards,
Jamie Ian Fargen