For small cluster configurations where you want to ensure high availability, deploy each Active Cluster with at least three physically separate cluster nodes (separate TDV servers). Each cluster node should be deployed on a computer with two or more CPUs.

Estimate the number of users and client requests that you expect to operate simultaneously.

Finally, consider how many servers might fail simultaneously. Be sure that if the maximum number of failures occurred, the remaining server nodes can handle the work load.

Having a large number of nodes in a cluster can have an impact on performance. See Performance Considerations.