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5.3. Configuring Cluster Properties

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In addition to configuring cluster parameters in the preceding section (Section 5.2, “Starting the Cluster Configuration Tool”), you can configure the following cluster properties: Cluster Alias (optional), a Config Version (optional), and Fence Daemon Properties. To configure cluster properties, follow these steps:
  1. At the left frame, click Cluster.
  2. At the bottom of the right frame (labeled Properties), click the Edit Cluster Properties button. Clicking that button causes a Cluster Properties dialog box to be displayed. The Cluster Properties dialog box presents text boxes for Cluster Alias, and Config Version, and two Fence Daemon Properties parameters (DLM clusters only): Post-Join Delay and Post-Fail Delay.
  3. (Optional) At the Cluster Alias text box, specify a cluster alias for the cluster. The default cluster alias is set to the true cluster name provided when the cluster is set up (refer to Section 5.2, “Starting the Cluster Configuration Tool”). The cluster alias should be descriptive enough to distinguish it from other clusters and systems on your network (for example, nfs_cluster or httpd_cluster). The cluster alias cannot exceed 15 characters.
  4. (Optional) The Config Version value 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 text box.
  5. Specify the Fence Daemon Properties parameters (DLM clusters only): Post-Join Delay and Post-Fail Delay.
    1. 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.
    2. 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.

    Note

    For more information about Post-Join Delay and Post-Fail Delay, refer to the fenced(8) man page.
  6. Save cluster configuration changes by selecting File => Save.
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