Utility Functions › Data Set Utility › Define GDG (Generation Data Group) › Field Descriptions

Field Descriptions

Generations in GDG

Type the maximum number of generation data sets to be associated with the Generation Data Group being defined.

The value of this field must be in the range of 1 to 255.

Expiration

The value typed into this optional field can be in one of two formats:

• Expiration Date is a date in CCYY/MM/DD format on which the GDG base may be deleted.
• Retention Number of Days is a number of days from 0 to 9998 that tells how many days the GDG must be retained before it is deleted.

If you do not type an Expiration Date or Retention Number of Days, the GDG base may be deleted at any time.

If you type a value of 9999, the GDG is retained indefinitely.

Uncatalog all?

Type Y or N to indicate whether to uncatalog all generations when the maximum number of generations in the GDG is exceeded.

• N – Uncatalog only the oldest generation when the maximum number of generations is exceeded. This is the option that is applicable to most GDG situations.
• Y – Uncatalog all generations of the GDG when the maximum number of generations is exceeded.

Scratch over limit?

Type Y or N to indicate whether data sets are to be scratched when generations are uncataloged as the maximum number of generations is exceeded. For example, deleted from the VTOC and the space reused.

• Y – Delete each data set when it is uncataloged. For example, when the maximum number of generations is exceeded.
• N – Leave data sets on the volume when they are uncataloged as the maximum number of generations is exceeded.

Owner ID

You can use this optional field to specify an owner associated with the GDG that is being defined.

If the Owner ID is not specified, the TSO User ID is defined as the owner.