Cold starting IMS in a shared-queues environment

You perform a cold start when starting IMS for the first time, or after changing the nucleus in a system definition. IMS never uses information from a previous shutdown as input to a cold start.

In a shared-queues environment, IMS does not discard messages on shared queues. If you want to discard messages on shared queues, you must scratch the shared-queue structures on the coupling facility, and scratch and reallocate the CQS structure recovery data sets.