![[AIX Solaris HP-UX Linux Windows]](../images/dist.gif)
![[z/OS]](../images/ngzos.gif)
Determining the stacking number for a dynamic cluster
You can use profiling to determine the stacking number for your dynamic cluster. The stacking number is the number of cluster instances that are needed to use all the power of a node.
Before you begin
- Determine if your applications have an internal bottleneck. For more information, read about configuring vertical stacking.
About this task
You can determine the stacking number by profiling of your application. If your dynamic cluster is homogeneous, and all of the nodes for the dynamic cluster have similar power, you need to profile and determine the stacking number on one node only. If the member nodes for the dynamic cluster are heterogeneous and vary in power, you must profile each node and determine the stacking number for each node.
Procedure
- Start one server instance on the test node.
- View CPU utilization and average throughput curves for the node. To view the charts, click .
- Increase the load on the node, with the goal of reaching 90-100% node utilization.
- If you cannot reach 90-100% node utilization, add and start another server instance on the test node. Continue adding server instances until the node utilization reaches 90-100%.
- The current number of server instances on the test node is the stacking number. Remember this number so that you can configure the stacking number in the administrative console.
- If your dynamic cluster has member nodes that are heterogeneous, repeat these steps for each node and record a stacking number for each node.