1. If you are migrating to a new server platform/operating system, copy the engines and consoles from the original servers to the new ones.
  2. If your new environment needs unlimited Java Cryptography Extension (JCE):
    • Install the new Java and unlimited JCE on the new servers.
    • Upgrade the old console installations on the new servers.
    • Upgrade the old engines on the new servers.
    • Update the run.properties file to reflect new IP addresses on the new servers.
  3. Configure load balancers for the new clusters:
    • Validate that the new configuration is working by updating a few host files on desktops using the new load balancer address.

      Reference adapters and OAuth aren't very testable in any scenario other than on the cutover platform.

    • Switch DNS to the new clusters after you've successfully unit tested the configurations.