Installation guide

httpd_cluster). The cluster alias cannot exceed 15 characters.
4. (Optional) T he 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 Propert ies parameters (DLM clusters only): Post-Join Delay and
Post-Fail Delay.
a. T he 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. T he 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.
b. T he 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.
5.4. Configuring Fence Devices
Configuring fence devices for the cluster consists of selecting one or more fence devices and specifying
fence-device-dependent parameters (for example, name, IP address, login, and password).
To configure fence devices, follow these steps:
1. Click Fence Devices. At the bottom of the right frame (labeled Properties), click the Add a
Fence Device button. Clicking Add a Fence Device causes the Fence Device
Configuration dialog box to be displayed (refer to Figure 5.4, “Fence Device Configuration”).
Figure 5.4 . Fence Device Configuration
2. At the Fence Device Configuration dialog box, click the drop-down box under Add a New
Fence Device and select the type of fence device to configure.
Red Hat Enterprise Linux 4 Cluster Administration
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