Default node priority

Default node priority is identified by the position of a node in the node list for a particular resource group.

The first node in the node list has the highest node priority. This node is also called the home node for a resource group. The node that is listed before another node has a higher node priority than the current node.

Depending on the fallback policy for a resource group, when a node with a higher priority for a resource group (that is currently being controlled by a less priority node) joins or reintegrates into the cluster, it takes control of the resource group. That is, the resource group moves from nodes with less priorities to the higher priority node.

At any given time, the resource group can have a default node priority specified by the participating node list. However, various resource group policies you select can override the default node priority and "create" the actual node priority according to which a particular resource group would move in the cluster.

Dynamic node priority

By setting a dynamic node priority policy you to use an RSCT resource variable such as lowest CPU load to select the takeover node for a nonconcurrent resource group. With a dynamic priority policy enabled, the order of the takeover node list is determined by the state of the cluster at the time of the event, as measured by the selected RSCT resource variable. You can set different policies for different groups or the same policy for several groups.