The virtual server name is independent of the name of the physical server on which the virtual server runs and can migrate from server to server. In a cluster environment, the active node will always use the cluster virtual name and IP address to provide service instead of the physical hostname and IP address. Through the use of clusters, virtual servers are created so that when another server takes it place, the services can still be available. The virtual name and IP address are linked with Arcserve Backup. Similarly, other cluster-aware applications (SQL/Exchange Cluster) often create a dedicated virtual name and IP address for high-availability purposes during their installation.
Unlike a physical server, a virtual server is not associated with a specific computer, and it can fail over from one server to another. If the server that is hosting the virtual server fails, clients can still access its resources by using the same virtual server name, but they will be redirected to a different server in the cluster.
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