Definition guidelines for data set masks
Follow the guidelines for defining data set masks and delete or deactivate unused data set masks.
When you define data set masks:
- Keep amount of data small.
- Keep amount of time to collect data as short as possible.
- Avoid duplication of data in a group:
- By ensuring that the defined masks are unique
- By ensuring that they do not overlap
When you specify a data set mask, you can clear the Space Data option:
- When space-related data, such as tracks allocated or used or both, are not required
- When the last reference date is not required
Tip: Delete the data set masks and groups that you no longer use. If
you do not want to permanently delete a data set mask or group, you can deactivate
it by editing it and clearing the Active option.