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 7 Platform servers.
Organizations can employ vertical cluster scale by adding multiple Pega 7 Platform server instances to support production load. Determine the number of Pega 7 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.