Enabling WTO(R) Buffer Shortage Recovery

You can customize the WTO(R) buffer shortage recovery of SA z/OS with the MESSAGES/USER DATA policy item of the customization dialog for the MVS Component entry type (MVC).

Code definitions for the message ID WTOBUF are used to specify jobs that are canceled or kept in case a WTO(R) buffer shortage is threatening. The jobs that you select for cancelation will then no longer issue WTO(R)s.

Specify code definitions for message ID WTOBUF with the following values:

CODE1: Specifies the name of the job which might or might not be canceled.
CODE2: This must be WTO, WTOR, or * to indicate which requests the job (or jobs) might or might not be canceled for. Use just * to specify WTO and WTOR requests.
CODE3: This must be blank.
Value Returned: This must be CANCEL to indicate that the job (or jobs) might be canceled or KEEP to indicate that they might not.

Example:

 Code 1          Code 2          Code 3          Value Returned                 
 JOB1            WTOR                            KEEP                           
 JOB2*           WTO                             KEEP                           
 JOB3*           *                               CANCEL                         
 JOB4*           *                               KEEP                           
 *               *                               KEEP

To set up the default behavior for all jobs not explicitly defined, a specification of CODE1=* and CODE2=* is needed. To indicate that all other jobs might be canceled specify CANCEL in the Value Returned field, otherwise specify KEEP.

The job name *MASTER* cannot be entered in the Code 1 field. Even if your default behavior is set up to cancel all jobs that have not been explicitly defined, a cancel command is not issued against *MASTER* if it is the job name being checked. This is because *MASTER* is non-cancelable.