Memorex LOCK - VERSION 2-24 Dokumentacja Pobierz pdf (Strona 261)

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Sorting with BIM-EPIC SORTWK Datasets

Chapter 7. Running Jobs With BIM-EPIC 7-41

SORTWK Datasets

To provide optimal utilization of disk work space, SORTWK datasets should be defined as

temporary datasets and deleted as soon as they are no longer in use.

1. Catalog SORTWK datasets as work ("WRK" using Online Manager, or WRK=YES using

TSIDMNT).

2. Use the CWDS facility or partition/CPU-independent datasets so that the datasets can be

processed in any partition without conflict.

Various BIM-EPIC options can be used to delete SORTWK areas upon completion of a sort.

1. Controlled SORTWK datasets are deleted automatically at end of job.

2. Common work datasets ($$$) are also deleted at end of job.

3. If the sort program closes SORTWK, use the DLBL "D" option or the DD

DISP=(,DELETE) parameter to delete SORTWK at close.

4. If the sort program does not close SORTWK, use the DLBL "D" option or the DD

DISP=(,DELETE) parameter and execute TSIDDEL after every sort step.

For jobs that contain multiple sort steps, SORTWK datasets should be deleted after each sort

step, using either (3) or (4) above as applicable.

All sorts check specific SYS numbers to determine the device type for each dataset that is to

be opened. The sort searches the following sources (in the order listed) for the SYS number to

be used for each dataset. The search stops as soon as a SYS number is found.

1. The SYS number found in the VSE label area for disk datasets (from the EXTENT

statement or the DD OPTION=SYSnnn parameter)

2. Sort control statements (SORTIN, SORTOUT, SORTWK keywords); which TSIDSRT can

modify if necessary.

3. Sort defaults (standard or user-specified: SYS001 for SORTOUT, SYS002 for SORTIN1,

SYS003 for SORTWK, and so on).

NOTE: If LUB allocation is active for sort datasets, the SYS numbers checked by the sort in

its pre-open processing may not be the same SYS numbers assigned by BIM-EPIC when the

open actually occurs.

Description

DSN Catalog

JCL Requirements

Pre-Open Checking

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