Memorex LOCK - VERSION 2-24 Informações Técnicas Página 35

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Versioning Datasets
User Reference
Connectivity Systems, Inc.—Copyright © 2006
Use Pursuant to Company Instructions
1-17
BIM-EPIC Versioning and Retention
Versioning Datasets
Description As each version of a dataset is created, BIM-EPIC automatically records
attributes specific to that version in the DSN Catalog. This section
describes the attributes that are recorded.
Version Number The version number identifies the version of a dataset. The current or
most recently created version is always version 1. Whenever a new
version of a dataset is created, previous version numbers are
automatically incremented. Versions in scratch status, open status, or
conditionally cataloged status do not have version numbers.
Generation
Number
The generation number is a nine-character suffix, for example,
.G=nnnnnn, appended to the dataset name when the dataset is written to
the VTOC. A generation number begins in position 36 of the dataset
name and is assigned to each generation disk version.
Since several versions of a generation dataset can be written on the same
disk volume, BIM-EPIC appends a unique generation number to each
dataset name to ensure that the dataset name is unique in the VTOC.
Although the VSE VTOC dataset name includes the generation number,
BIM-EPIC does not consider the generation number to be part of the
dataset name. Therefore, do not include the dataset name in your JCL
when using BIM-EPIC to process the dataset under DSN Catalog control.
Specify the dataset name only as it appears in the BIM-EPIC dataset
definition.
Version Status BIM-EPIC tracks the status of each version. The following information
describes each BIM-EPIC status type.
Status Type Indicator Description
Active A The default status of an unlocked active
version.
Open O Indicates a version did not close successfully.
An open version cannot be used or scratched
until you declare it closed using Online
Manager or TSIDMNT.
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