Change accumulation input data sets

You can use change accumulation data sets as input to IMS Database Recovery Facility.

However, there are cases where change accumulation data sets cannot be used for recovery. For example, if there is no deallocation point between the change accumulation stop time and the recovery time, IMS Database Recovery Facility cannot use the change accumulation data set.

However, it is not necessary to first run the IMS High Performance Change Accumulation Utility before database recovery. If no acceptable change accumulation data set is found, IMS Database Recovery Facility will read and process all of the logs needed to ensure updates from all systems are included in the recovery.