Linux.com: Live Migration of Xen Domains

“Virtualization is all the rage these days. Advances in x86
performance, as well as the increasing energy requirements of
servers, make efficiently provisioning machines a necessity. Xen,
an open source virtual machine (VM) monitor, works with just about
any Linux distribution. One useful feature for shops that care
about high availability is Xen’s ability to migrate virtual
machines while they are running. By using VM migration, you can
pool computing resources just as you can pool storage. Here’s
how…”

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