Application tier architecture

Highly available application tier architectures must have enough computing power to support fail-over, as well as a means to allocate new servers to support increased demands for service.

To deploy a highly available production system, two or more physical or virtual machines are needed. These allow for horizontal cluster scale and provide hardware redundancy to maximize efficiency and offer a solution for crash recovery. Each machine can deploy one or more Pega Platform servers.

Organizations can employ vertical cluster scale by adding multiple Pega Platform server instances to support production load. Determine the number of Pega Platform server instances based on capacity planning and by evaluating operational thresholds.

For information on supported application server platform versions, see the Platform Support Guide on the PDN.