Does anyone have any experience in migrating a large legacy farm CAS cluster into the new load balancing cluster brought in by 12.3? We have 12 CAS servers that are farm cluster nodes (one master and 11 slaves) with report data server configuration setup for all of them.
Parallel environment cut over is not an option for us. However we do have 4-5 new and unused CAS servers we could leverage in the migration.
There's no option to help you here, the upgrade process will build you a new style farm of multiple (12) single CAS clusters. Providing you with the same functionality as 12.2.
To take advantage of the new load balancing feature, requires erasing the database of any CAS you add to a cluster, so you wouldn't be able to keep your existing data.