In the previous section we explored the simplest way to migrate domains on your Xen server. This simple way will not be an option in cases where you have SLA on your servers or where you want to minimize the interruption of services. Xen provides a powerful feature called live migration that lets you migrate running domains to a different Xen server with minimal disruption to the services. In this section we will discuss live migration and the process that Xen goes through under the covers in order to make it happen.
The server configuration that we will use for live migration consists of the following: