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

Building a Continental Cluster
Building the ContinentalClusters Configuration
Chapter 5236
NOTIFICATION
NOTIFICATION
CLUSTER_EVENT <cluster_name>/UP
MONITORING_CLUSTER
CLUSTER_ALERT
NOTIFICATION
CLUSTER_EVENT <cluster_name>/ERROR
MONITORING_CLUSTER
CLUSTER_ALERT
NOTIFICATION
Selecting Notification Intervals
The monitor interval determines the amount of time between distinct
attempts by the monitor to obtain the status of a cluster. The intervals
associated with notifications need to be chosen to work in combination
with the monitor interval to give a realistic picture of cluster events.
Some combinations are not useful. For example, notification intervals
that are smaller than the monitor interval do not make sense, and
should be avoided. In the following example, the cluster event will
always result in two alerts followed by an alarm. No change of state
could possibly be detected at the one-minute, two-minute and
three-minute intervals, because the monitor does not check for changes
until the monitor interval ( 5 minutes) has been reached.
MONITOR_PACKAGE_NAME ccmonpkg
MONITOR_INTERVAL 5 MINUTES
...
CLUSTER_EVENT LACluster/UNREACHABLE
CLUSTER_ALERT 1 MINUTE
NOTIFICATION CONSOLE
"1 Minute Alert: LACluster Unreachable"
CLUSTER_ALERT 2 MINUTES
NOTIFICATION CONSOLE
"2 Minute Alert: LACluster Still Unreachable"
CLUSTER_ALARM 3 MINUTES
NOTIFICATION CONSOLE
"ALARM: LACluster Unreachable after 3 Minutes: Recovery
Enabled"