Good standard practice in handling a high availability system
includes careful fault monitoring so as to prevent failures if possible
or at least to react to them swiftly when they occur. The following
should be monitored for errors or warnings of all kinds:
Some monitoring can be done through simple physical inspection,
but for the most comprehensive monitoring, you should examine the
system log file (/var/adm/syslog/syslog.log) periodically for reports on all configured HA devices.
The presence of errors relating to a device will show the need for
maintenance.
Using
Event Monitoring Service |
 |
Event Monitoring Service (EMS) allows you to configure monitors
of specific devices and system resources. You can direct alerts
to an administrative workstation where operators can be notified
of further action in case of a problem. For example, you could configure
a disk monitor to report when a mirror was lost from a mirrored
volume group being used in a non-RAC package. Refer to the manual Using the Event Monitoring Service (B7612-90009) for
additional information.
Using
EMS Hardware Monitors |
|
A set of hardware monitors is available for monitoring and
reporting on memory, CPU, and many other system values. Refer to
the EMS Hardware Monitors User’s Guide (B6191-90020)
for additional information.
Using
HP Predictive Monitoring |
|
In addition to messages reporting actual device failure, the
logs may accumulate messages of lesser severity which, over time,
can indicate that a failure may happen soon. One product that provides
a degree of automation in monitoring is called HP Predictive, which
gathers information from the status queues of a monitored system
to see what errors are accumulating. This tool will report failures
and will also predict failures based on statistics for devices that
are experiencing specific non-fatal errors over time. In a ServiceGuard cluster,
HP Predictive should be run on all nodes.
HP Predictive also reports error conditions directly to an
HP Response Center, alerting support personnel to the potential
problem. HP Predictive is available through various support contracts.
For more information, contact your HP representative.
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