Memorex LOCK - VERSION 2-24 Informacje Techniczne Pobierz pdf (Strona 301)

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Common Work Datasets

User Reference

Use Pursuant to Company Instructions

7-33

Common Work Datasets

Description The easiest way to control sort work, compiler work areas, and any other

disk-only dataset that does not need to be kept after end-of-job is to use

the Common Work Dataset (CWDS) feature.

When a dataset name begins with three dollar signs and a period, for

example $$$. or £££. if in the U.K., BIM-EPIC recognizes the dataset as a

CWDS. The $$$. or £££. in the dataset name is replaced by the CPU ID

and partition ID that executed the job. This substitution is the reverse of

=== datasets to avoid any conflicts if both are used with the same dataset

name. In addition, a CWDS is automatically deleted at end-of-job, even if

the job cancels.

Since each version is deleted at the end of every job, no versions are

recorded in the DSN Catalog or kept on disk. If you attempt to open a

version as input in a new job, the job cancels with an appropriate error

message.

CWDS requires you to catalog only one dataset name. This is different

from CPU/partition independence which requires you to catalog a

partition/CPU independent dataset name for every partition and machine

combination in which the dataset can be used.

DSN Catalog In the DSN Catalog, you must:

 Catalog the dataset name beginning with $$$. or £££. if in the

U.K. Use the remaining 40 characters to name the dataset.

 Specify the dataset as work. If you use Online Manager, specify

WRK. If you use TSIDMNT, specify WRK=YES.

 Cycle, retention period, and DLA retention are ignored if they are

specified.

Example The following control statement catalogs a CWDS using TSIDMNT.

CAT '$$$.SORTWK1',WRK=YES,POL=POOL01,EXT=120

JCL

Requirements

There are two JCL requirements you must consider.

 Specify the dataset name beginning with $$$. or £££. if in the

U.K.

 No delete options are necessary on the DLBL or DD statement.

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