Memorex LOCK - VERSION 2-24 Informations techniques télécharger pdf (Page 30)

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BIM-EPIC Dataset Definition Components

1-12 User Reference

Use Pursuant to Company Instructions

retained for the periods indicated in the Retention Days field and the DLA

Retention field, BIM-EPIC can retain more versions than the number

specified in the Cycles Retention field. Cycles 5 and Retentions Days 0

will insure that 5 versions are always present. Cycles 5 and Retention

Days 60 may result in more than 5 versions being present.

When you designate a dataset as a non-generation dataset or work dataset,

BIM-EPIC retains only one version of the dataset at a time. As long as no

new version is created, the version is retained for the time period

indicated in the Retention Days field and the DLA Retention field. When

you create a new disk version of a non-generation/work dataset, the old

version is scratched automatically, even if the old version has not expired.

In addition, entries are automatically scratched from the VTOC to avoid

the OVERLAP ON UNEXPIRED FILE message VSE generates. When

you create a new tape version of a non-generation/work dataset, the old

tape version is scratched when you execute TSIDUTL SCRATCH.

When you specify a cycles retention value of one (1) for a non-generation

dataset, BIM-EPIC always retains one version, even if the other retention

criteria have expired.

Retention Days Retention days specify the number of days each version should be

retained after its creation date.

You can use retention days to specify permanent retention (PERM).

When a disk version is created with permanent retention, an expiration

date of 2099366 is recorded in the VTOC entry. When BIM-EPIC sees

the 2099366 expiration date, the dataset cannot be deleted in response to

an INSUFFICIENT SPACE condition.

Cycles

Retention

Cycles retention specifies the minimum number of active versions

(cycles) to maintain at all times. To maintain more than one version, you

must designate the dataset as a generation dataset.

DLA Retention Days after Last Access (DLA) retention relates expiration to dataset use.

Even if other retention criteria have expired, the dataset cannot expire if it

has been accessed as input during the last n days.

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Memorex LOCK - VERSION 2-24 Informations techniques Page 30

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