Using Serviceguard Extension for RAC, 6th Edition, April 2008

4 Maintenance and Troubleshooting
This chapter includes information about carrying out routine maintenance on an Real
Application Cluster configuration. As presented here, these tasks differ in some details
from the similar tasks described in the Managing Serviceguard documentation.
Tasks include:
• “Reviewing Cluster and Package States with the cmviewcl Command”
• “Online Reconfiguration”
• “Managing the Shared Storage”
• “Removing Serviceguard Extension for RAC from a System”
• “Monitoring Hardware ”
• “Adding Disk Hardware ”
• “Replacing Disks”
• “Replacement of I/O Cards”
• “Replacement of LAN Cards”
Reviewing Cluster and Package States with the cmviewcl Command
A cluster or its component nodes may be in several different states at different points
in time. Status information for clusters, packages and other cluster elements is shown
in the output of the cmviewcl command and in some displays in Serviceguard
Manager. This section explains the meaning of many of the common conditions the
cluster or package may be in.
Information about cluster status is stored in the status database, which is maintained
on each individual node in the cluster. You can display information contained in this
database by issuing the cmviewcl command:
# cmviewcl -v
The command when issued with the -v option displays information about the whole
cluster. See the man page for a detailed description of other cmviewcl options.
TIP: Some commands take longer to complete in large configurations. In particular,
you can expect Serviceguard’s CPU utilization to increase during cmviewcl -v as
the number of packages and services increases.
You can also specify that the output should be formatted as it was in a specific earlier
release by using the -r option indicating the release format you wish. Example:
# cmviewcl -r A.11.16
See the man page for a detailed description of other cmviewcl options.
Reviewing Cluster and Package States with the cmviewcl Command 139