Data set backup
The Model9 data set backup policy type, allows backing up resources based on three main filters:
- Data set name
- Volume name
- Storage group name
Each of the three above allows specifying multiple values separated by a coma.
The first filter would invoke a z/OS catalog search for each value specified which could lead to excessive CP usage and the run itself could take a long time.
It is recommended that for large data set backup policy runs, to use either volume name or storage group name as the main select-by filter. This is due to the fact the these two filter type would invoke IDCAMS DCOLLECT which is zIIP eligible and scans the potential resources more efficiently than a regular catalog search.