Several applications use clustering, including stateless applications such as Web servers, and applications with built-in recovery features such as database servers. You can set up MSCS clusters in several configurations, depending on your environment.
A typical clustering setup includes:
Disks that are shared between nodes. A shared disk is required as a quorum disk. In a cluster of virtual machines across physical hosts, the shared disk must be on a Fibre Channel (FC) SAN, FCoE or iSCSI.
A private heartbeat network between nodes.
You can set up the shared disks and private heartbeat using one of several clustering configurations.