Memorex LOCK - VERSION 2-24 Informações Técnicas descarregar pdf (Página 239)

DISP Parameter

User Reference

Connectivity Systems, Inc.—Copyright © 2006

Use Pursuant to Company Instructions

6-23

Using DDGEN

with the DISP

Parameter

The DDGEN configuration option specifies when a dataset version is to

be deleted based on the DISP parameter.

MOD Specifies that new data is to be

added/appended to an existing tape

version. If using a disk version, the

existing data will be overwritten. For

both tape and disk, if there is no existing

version, a new version will be created.

When used for tape, MOD removes the

existing end-of-file (EOF) marker and

writes new data beginning at that point.

A new EOF will be created when the

dataset is closed.

When used for disk, MOD reuses the

extents used in the last/most recent

version. This destroys any existing data.

Note: MOD can be specified only for

non-generation disk datasets.

!

WARNING:

MOD does not extend an existing disk

dataset as it does for tape or as it does in

MVS. If MOD is specified for an existing

disk dataset that is opened as output, the

same extent is used but records are

written at the beginning of the dataset.

Any data already in the dataset is

overwritten and lost.

NEW Specifies a new dataset or a new version

of an existing dataset.

OLD Specifies a version of an existing dataset.

PASS Retains the version for use in a later step

in the same job.

SHR Specifies an existing dataset. Data in the

dataset will be appended if tapes are used

or overwritten if disks are used. Use

KEEP and CATLG to retain the dataset

if the job cancels via an abnormal

termination. The default disposition for

abnormal termination depends on both

the normal termination subparameter and

the PURBYP configuration option.

Subparameter Definition

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