"If just one server goes down, essential services don't have to shut down, too. Linux administrators can keep those services up all the time by setting up a Heartbeat cluster on Linux. Heartbeat adds the advantage of the cluster to Xen virtual machines (VMs) as well, so VMs can also be maintained when a server crashes.
"This series explains how to configure and use a Heartbeat cluster on SUSE Linux Enterprise Server using a storage area network (SAN) and a Xen VM as a cluster resource. I'll also discuss the Linux Heartbeat project, whose mission is improving critical services availability in the network environment at critical times..."
