HP StorageWorks Clustered File System 3.2.1 Windows Storage Server Edition Administration Guide (February 2006)

Chapter 4: Configure Servers 36
IP address: The IP addresses for the virtual hosts that you will use for
each server in the cluster. These are the IP addresses that the DNS will
use to send alternate requests.
With this setup, the domain name server sends messages in a round-
robin fashion to the two virtual hosts indicated by the IP addresses,
causing them to share the request load. Each virtual host has a single
primary server on which it performs its work; the other server is a backup
in case the primary goes down or is taken offline for maintenance.
Depending on your needs, more complicated combinations of DNS
round robin and HP Clustered File System can be used, including cluster
configurations with multiple failover-protected load-balanced servers.