Minimizing data set contention

The following are recommendations on how to minimize data set contention during aggregate backup. If you do not follow these recommendations, aggregate backup may fail.

Do not perform ABACKUP processing during AUTOMIGRATION processing.
Do not perform ABACKUP processing during AUTOBACKUP processing if you are processing VSAM data sets.
Do not use aggregate backup while the application is in use.
Use the concurrent copy feature of ABARS.

Performing ABACKUP processing concurrent with volume dumping or while backing up non-VSAM data sets is not a problem.

Data sets cannot be migrated or recalled during aggregate backup processing.

When ABACKUP processes data sets on level 0 volumes and the status of a data set changes (for example, it is moved or deleted) after catalog information about the list of data sets to process has been created (but before serialization), ABACKUP processing fails. The ABACKUP processing must be entirely rerun.