Designing Disaster Tolerant High Availability Clusters, 10th Edition, March 2003 (B7660-90013)

Building a Metropolitan Cluster Using MetroCluster/CA
XP/CA Device Group Monitor
Chapter 3 117
XP/CA Device Group Monitor Operation Overview
The XP/CA device group monitor runs as a package service. The user can
configure the monitor's setting through the package's environment file.
Once the package has started the XP/CA device group monitor, the
monitor will periodically check the status of the XP/CA device group. If
there is a change in the status or the monitor is configured to notify after
an interval of no status change, the monitor will send a notification that
states the reason for the notification, a timestamp, and the status of the
XP/CA device group.
Configuring the Monitor
Use the following steps to configure a monitor for a package’s device
group:
• Configure the monitor’s variables in the package environment file.
• Configure the monitor as a service of the package.
Configure the Monitor’s Variables in the Package
Environment File.
Edit the following variables of the monitor’s section in the environment
file <pkgname>_xpca.env as follows:
NOTE See Appendix A for an explanation of these variables.
• Uncomment the MON_POLL_INTERVAL variable and set it to the
desired value in minutes. If this variable is not set, it will default to a
value of 10 minutes.
• Uncomment the MON_NOTIFICATION_FREQUENCY variable and set it
to the desired value. This value is used to control the frequency of
notification message when the state of the device group remains the
same after the first check of the device group's state. If the value is
zero, the monitor will only send notification when the state of the
device group has changed. If the variable is not set, the default will
be 0.