Study Notes

Cluster name: should be descriptive enough to distinguish it from other clusters and systems on your network.

The config version(optional): is set to 1 by default and is automatically incremented each time you save your cluster configuration. However, if you need to set it to another value, you can specify it at the config_version box.

Specify the Fence Domain Properties parameters: Post-Join delay, Post-Fail delay.
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 10 and 30 seconds, but can vary according to cluster and network performance.
The Post-Fail Delay parameter is the number of seconds the fence daemon(fenced) waits before fencing a node(a member of 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. Refer to fenced(8) man page.

A failover domain is a named subset of cluster nodes that are eligible to run a cluster service in the event of a node failure. A failover domain can have the following characgters:
1. Unrestricted: Allows you to specify that a subset of members are preferred, but that a cluster service assigned to this domain can run on any available member.
2. Restricted: Allows you to restrict the members that can run a particular cluster service. If none of the members in a restricted failover domain are available, the cluster service can not be started(either manually or by the cluster software).
3. Unorderd: When a cluster service is assigned to an unorder failover domain. The member at the top of the list in the most preferred, followed by the second member in the list.
By default, failover domain are unrestricted and unordered.

To configure a preferred member, you can create an unrestricted failover domain comprising only one cluster member. Doing that cause a cluster service to run on that cluster member primariily(the preferred member), but allows the cluster service to failover to any of the other members.

The failover domain name should be descriptive enough to distinguish its purpose relative to other names used in cluster.