Cluster performance

When changes are made to a cluster, the overhead necessary to manage the cluster can be affected.

The only resources that clustering requires are those necessary to perform heartbeat monitoring, to manage the cluster resource groups and the cluster nodes, and to handle any messaging taking place between cluster resource groups and cluster nodes. Once your clustering environment is operational, the only increase in overhead will be if you make changes to the cluster.

During a normal operating environment, there should be minimal impact to your clustered systems due to clustering activity.

• Balance network load for clusters
  Balance the network load by splitting your work between the communication lines that you use to connect the nodes in the cluster.
• Tune cluster performance
  Since potentially significant differences exist in your communications environment, you have the capability to adjust variables that affect cluster communications to best match your environment.