You can use Apple Qadministrator to find out what is happening within a cluster by examining details (such as processor usage, which batch is being processed, disk space usage, and data activity) about each node in the cluster.
In the Cluster list, select the cluster you want to examine.
Select a node in the Cluster Service Nodes list.
Click the Info (I) button near the bottom of the Cluster list.
In the window that appears, click the CPU, Memory, Volume Info, and I/O Activity tabs to see a variety of details about the selected node.