HP StorageWorks Clustered File System 3.6.0 Windows Storage Server Edition Administration Guide (403103-005, January 2008)

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Configure Service Monitors
Service monitors are typically used to monitor a network service such as
HTTP or FTP. If a service monitor indicates that a network service is not
functioning properly on the primary server, HP Clustered File System can
transfer the network traffic to a backup server that also provides that
network service.
Overview
Before creating a service monitor for a particular service, you will need to
configure that service on your servers. For example, you could configure
a Web server application to provide HTTP service and then create a
service monitor for HTTP. A service can run regardless of HP Clustered
File System monitoring.
Service Monitors and Virtual Hosts
A service monitor is associated with a specific virtual host; the monitored
service must be configured on all servers supporting that virtual host.
Using virtual hosts enables HP Clustered File System to switch traffic
quickly between servers. If the service being monitored goes down on the
primary server, HP Clustered File System moves the virtual host to a
backup server, which then handles the traffic for the service.
If you add another server to the configuration for a virtual host, the
service monitors assigned to that virtual host are automatically added to
the new server. Similarly, if a server is removed from the configuration,
the service monitors assigned to the virtual host are automatically
removed from that server. Service monitor parameters (such as probe