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

Chapter 16: Configure Service Monitors 201
Probe Type
Service monitors can be configured to be either single-probe or multi-
probe. A multi-probe monitor performs the probe function on each node
where the monitor is configured, regardless of whether the monitor
instance is active or inactive. This is the default for the built-in monitors.
Single-probe monitors perform the probe function only on the node
where the monitor instance is active. This type of configuration is useful
for applications such as databases that are not cluster-aware and should
be run on only one node at a time. The monitor instance is activated on
the node where the associated virtual host is activated, and the probe
takes place on that node. The monitor instances on other nodes are
marked as “standby” on the Management Console.
If the virtual host fails over to a backup node, the monitor instance on the
original node becomes inactive and the probe is no longer run on that
node. HP Clustered File System activates the virtual host on the new
node, which causes the monitor instance on that node to change status
from “standby” to “active.” The monitor then begins probing on that
node and the Start script starts the application.
If the monitor instance cannot be activated on the new node, the virtual
host will fail over to another backup node if possible.
Custom Scripts
The Scripts tab lets you customize a service monitor with Start, Stop, and
Recovery scripts. You can also configure the event severity and script
ordering for the service monitor.