Memorex LOCK - VERSION 2-24 Technické informace stáhnout pdf (Strana 228)

100

101

Parameters for Processing Datasets

6-12 User Reference

Use Pursuant to Company Instructions

Parameters for Processing Datasets

Description This section describes the dataset definition (DD) statement parameters

you can use to process different types of datasets.

The JCLOVRDE configuration option determines how DD parameters

affect DSN Catalog entries. This configuration option applies only to

datasets that exist in the catalog at the time the dataset is opened for

output. If JCLOVRDE=NO, the DD parameters will override their

catalog counterparts on a “one-time” basis. If JCLOVRDE=YES, the DD

parameters will replace their catalog counterparts in the dataset catalog

entry. The override will be permanent.

Tape Use caution when specifying the VOLUME parameter, FREE parameter,

and DISP parameter. VOLUME has several purposes. FREE holds and

releases tape drive assignments. DISP=(x,KEEP) unloads tapes at close.

By default a tape is rewound but not unloaded at close, if you specify

DISP=(x,KEEP), VOL=PRIVATE, or VOL=(,RETAIN).

Disk The SPACE parameter is important when using disk processing. Use the

SPACE parameter to determine extent allocations for datasets that are not

in the DSN Catalog. SPACE is required for Start Track 1 and

uncontrolled datasets. You can reuse the same extent with DISP=MOD.

UNIT is required for disk output.

Cataloged If the dataset is already defined in the catalog, specify DISP=(x,KEEP)

for both input and output. You do not need to provide parameters if the

information is in the catalog entry for that dataset. You can override

cataloged parameters for a version by specifying the equivalent parameter

in the DD statement. For example, you can override period retention by

specifying LABEL=RETPD=n. If you want to permanently modify the

current dataset definition in the BIM-EPIC Catalog, specify

DISP=(x,CATLG). You must also set the JCLOVRDE=YES

configuration option.

If a dataset is not in the catalog and you want to automatically catalog it

(autocatalog), specify DISP=(NEW,CATLG). The new dataset is

cataloged using the data in the DD statement. DD statements cannot be

used to autocatalog an input dataset.

Note:Note:

If your BIM-EPIC configuration options specify the use of

autocataloging, when opened for output, a non-cataloged dataset will be

cataloged automatically even if you do not specify DISP=(x,CATLG).

The recommended method is to use DISP=(x,CATLG) to autocatalog all

1 2 ... 223 224 225 226 227 228 229 230 231 232 233 ... 567 568

Komentáře k této Příručce

Žádné komentáře

Memorex LOCK - VERSION 2-24 Technické informace Strana 228

Komentáře k této Příručce