Using the Tape Retention System (TRS) › Running the Tape Retention System › Process

Process

The procedure that runs the Tape Retention System, CATTRS, has two steps:

• TLMSTRS processes the Tape Retention System and generates a transaction file for processing by the next step.
• TLMSTRAN updates the Volume Master File.

There are two reasons for this:

• You can run TLMSTRS alone in forecast mode without updating the Volume Master File.
• In case of an error in the first step, you can rerun TLMSTRS without having to restore the Volume Master File.

If the first step executes without error, the second step will execute. If you are forecasting, the transaction file will be null (empty), so the second step will not update the Volume Master File. If TLMSTRS terminates in error or abends, TLMSTRAN will not execute. Correct the errors and rerun the entire job.

As an extra precaution, TRS compares the data set name and volser of CAIVMFS against the name of the active VMF, and if they are different, TRS does not write any transactions.