Using Serviceguard Extension for RAC, 6th Edition, April 2008
• All cables
• Disk interface cards
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 (B7609-90022) 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
(B6191-90015) for additional information.
Adding Disk Hardware
As your system expands, you may need to add disk hardware. This also means
modifying the logical volume structure. Use the following general procedure:
1. Halt packages.
2. Ensure that the Oracle database is not active on either node.
3. Deactivate and mark as unshareable any shared volume groups.
4. Halt the cluster.
5. Deactivate automatic cluster startup.
6. Shutdown and power off system before installing new hardware.
7. Install the new disk hardware with connections on all nodes.
8. Reboot all nodes.
9. On the configuration node, add the new physical volumes to existing volume
groups, or create new volume groups as needed.
10. Start up the cluster.
11. Make the volume groups shareable, then import each shareable volume group
onto the other nodes in the cluster.
12. Activate the volume groups in shared mode on all nodes.
13. Start up the Oracle RAC instances on all nodes.
14. Activate automatic cluster startup.
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