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3.8.2 Cluster Protocol Properties
You can use the Cluster Protocol property pages to view or edit the transmit frequency and tolerance
settings for all nodes in the cluster, including the master node. The master node is generally the first
node brought online in the cluster, but if that node fails, any of the other nodes in the cluster can
become the master.
If you change any protocol properties, you should restart all servers in the cluster to ensure the
changes take effect.
1 In the left column of the main iManager page, locate Clusters, then click the Cluster Options
link.
2 Enter the cluster name or browse and select it, then click the Properties button under the cluster
name.
3 Click the Protocols tab.
This page also lets you view the script used to configure the cluster protocol settings, but not
change it. Changes made to the protocols setting will automatically update the script.
Heartbeat
Heartbeat specifies the amount of time between transmits for all nodes in the cluster except the
master. For example, if you set this value to 1, nonmaster nodes in the cluster send a signal that they
are alive to the master node every second.
Tolerance
Tolerance specifies the amount of time the master node gives all other nodes in the cluster to signal
that they are alive. For example, setting this value to 4 means that if the master node does not receive
an "I'm alive" signal from a node in the cluster within four seconds, that node is removed from the
cluster.
Master Watchdog
Master Watchdog specifies the amount of time between transmits for the master node in the cluster.
For example, if you set this value to 1, the master node in the cluster transmits an "I'm alive" signal
to all the other nodes in the cluster every second.
Slave Watchdog
Slave Watchdog specifies the amount of time the master node has to signal that it is alive. For
example, setting this value to 5 means that if the nonmaster nodes in the cluster do not receive an
"I'm alive" signal from the master within five seconds, the master node is removed from the cluster
and one of the other nodes becomes the master node.
Max Retransmits
This value is set by default, and should not be changed.
3.8.3 Cluster IP Address and Port Properties
The Cluster IP address is assigned when you install Novell Cluster Services. The Cluster IP address
normally does need to be changed, but can be if needed.
Installation and Setup
45
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