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

Chapter 16: Configure Service Monitors 192
severity, Start scripts, and Stop scripts) are consistent across all servers
configured for a virtual host.
Service Monitors and Failover
If a monitored service fails, HP Clustered File System attempts to relocate
any virtual hosts associated with the service monitor to a network
interface on a healthier server. However, if there are multiple failures in
the cluster or the virtual host does not have a backup network interface
on another server, HP Clustered File System may not be able to move the
virtual host. The virtual host may then remain active on a server with a
failed monitored service. HP Clustered File System will avoid this
situation if there is a healthy server configured and available, but
sometimes it may not be possible in a multiple-failure scenario.
Types of Service Monitors
HP Clustered File System supports the following service monitors. When
you configure a monitor, you will need to supply the following
information.
Type Port
Default
Probe
Timeout
Default
Probe
Frequency Other Parameters
DNS 53 5 seconds 30 seconds IP address to resolve
FTP 21 5 seconds 30 seconds none
HTTP 80 5 seconds 30 seconds URL
HTTPS 443 5 seconds 30 seconds URL
IMAP4 143 5 seconds 30 seconds none
NNTP 119 5 seconds 30 seconds none
NTSERVICE
NA 15 seconds 30 seconds whether to start
dependent services
POP3 110 5 seconds 30 seconds none
SMTP 25 5 seconds 30 seconds none
TCP 0 5 seconds 30 seconds none
CUSTOM NA 60 seconds 60 seconds user probe script