Managing Serviceguard 11th Edition, Version A.11.16, Second Printing June 2004

Cluster and Package Maintenance
Reconfiguring a Cluster
Chapter 7304
When halted, select the cluster in the map or tree. From the Actions
menu, select Configuring Serviceguard. When the Configuring Cluster
window opens, click the Parameters tab. Enter the new number. Click
Apply. Close the configuration window. (After refresh, check the cluster’s
Properties to see the change.)
Using Serviceguard Commands to Change
MAX_CONFIGURED_PACKAGES
The cluster must be halted.
Use the cmgetconf command to obtain a current copy of the cluster's
existing configuration. Example:
# cmgetconf -C clconfig.ascii
Edit the clconfig.ascii file to include the desired value for
MAX_CONFIGURED_PACKAGES. Then use the cmcheckconf command to
verify the new configuration. Time can be significantly reduced if you use
the -k or -K options with cmcheckconf. Using -k or -K option with the
cmcheckconf command, can significantly reduce the response time.
Use the cmapplyconf command to apply the changes to the configuration
and send the new configuration file to all cluster nodes. Time can be
significantly reduced if you use the -k or -K options with cmapplyconf.
Reconfiguring a Running Cluster
You can add new nodes to the cluster configuration or delete nodes from
the cluster configuration while the cluster is up and running. Note the
following, however:
• You cannot change the quorum server or lock disk configuration
while the cluster is running.
• You cannot remove an active node from the cluster. You must halt the
node first.
• You cannot delete an active volume group from the cluster
configuration. You must halt any package that uses the volume
group and ensure that the volume is inactive before deleting it.
• You cannot change cluster timing parameters.
• The only configuration change allowed while a node is unreachable
(for example, completely disconnected from the network) is to delete
the unreachable node from the cluster configuration. If there are also