How to manually migrate a virtual machine from one host to another. The process is roughly: copy the guest config to the destination, create LVs on the destination, dd the LVs across ssh, instantiate and start the guest on the destination.
As I described in a previous post, I dedicate an LV in the host for each guest. The guest then uses LVM to manage the space. In this case the guest is contained in two logical volumes on the host.