Cold starting IMS in a non-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 nonshared-queues environment, a cold start assumes empty message queues, so IMS discards any messages that exist. You must close the last OLDS used by the online system before you attempt a cold start. You should also archive the last OLDS before a cold start, so the OLDS is available if a database recovery is required.