Red Hat ENTERPRISE LINUX 5 - ADMINISTRATION Manual page 36

Chapter 3. Configuring Red Hat Cluster With Conga
• The Cluster Name text box displays the cluster name; it does not accept a cluster name
change. You cannot change the cluster name. The only way to change the name of a Red Hat
cluster is to create a new cluster configuration with the new name.
• The Configuration Version value is set to 1 by default and is automatically incremented each
time you modify your cluster configuration. However, if you need to set it to another value, you
can specify it at the Configuration Version text box.
• You can enter advanced cluster properties by clicking Show advanced cluster properties.
Clicking Show advanced cluster properties reveals a list of advanced properties. You can
click any advanced property for online help about the property.
Enter the values required and click Apply for changes to take effect.
2. Fence tab — This tab provides an interface for configuring these Fence Daemon Properties
parameters: Post-Fail Delay and Post-Join Delay. The parameters are summarized as follows:
• The Post-Fail Delay parameter is the number of seconds the fence daemon (fenced) waits
before fencing a node (a member of the fence domain) after the node has failed. The Post-Fail
Delay default value is 0. Its value may be varied to suit cluster and network performance.
• The Post-Join Delay parameter is the number of seconds the fence daemon (fenced) waits
before fencing a node after the node joins the fence domain. The Post-Join Delay default
value is 3. A typical setting for Post-Join Delay is between 20 and 30 seconds, but can vary
according to cluster and network performance.
Enter values required and Click Apply for changes to take effect.
Note
For more information about Post-Join Delay and Post-Fail Delay, refer to the
fenced(8) man page.
3. Multicast tab — This tab provides an interface for configuring these Multicast Configuration
parameters: Let cluster choose the multicast address and Specify the multicast address
manually. The default setting is Let cluster choose the multicast address. If you need to use
a specific multicast address, click Specify the multicast address manually, enter a multicast
address into the text box, and click Apply for changes to take effect.
Note
IPV6 is not supported for Cluster Suite in Red Hat Enterprise Linux 5.
If you do not specify a multicast address, the Red Hat Cluster software (specifically, cman, the
Cluster Manager) creates one. It forms the upper 16 bits of the multicast address with 239.192 and
forms the lower 16 bits based on the cluster ID.
26