Memorex LOCK - VERSION 2-24 Especificações descarregar pdf (Página 45)

100

101

Additional BIM-EPIC Features and Functions Managing Disk Devices

Chapter 1. Introduction 1-31

Managing Disk Devices

BIM-EPIC uses disk pooling to make disk allocation more flexible and more efficient. The

systems programmer defines disk pools for use in your installation. Disk pools can include

one or more disk volumes. Part of a volume can also be allocated to a pool.

Each disk dataset must be assigned to a disk pool before allocation. Each time the dataset is

written, its allocation is made in that pool. Disk pools are referenced with a six-character pool

name. The same pool can also be referenced by alias pool names. In addition, you can have

CPU and partition-independent pool names. If these are defined, you can reference a partition

independent pool by ending its name with two dashes (for example, P O O L - -). For CPU

and partition independent pools, end the name with three dashes (for example, ‘P O L – – –’).

Pool names are assigned to datasets through JCL or the DSN Catalog.

Leveling reduces head contention by distributing allocations over the entire disk pool, rather

than concentrating them on a single volume. Each time a new extent is written, BIM-EPIC

makes the allocation on the next volume in the pool sequence.

Leveling is activated for each disk pool when the pool is defined.

BIM-EPIC’s offload utility moves datasets from disk to tape and back again. Processing is

done logically, so you can use the offload utility for backup, or to reorganize your disk space,

or just to offload infrequently used datasets (which remain known to BIM-EPIC and

automatically reload to a temporary disk dataset whenever needed). The only restriction is

that the offload utility only processes controlled, sequential datasets.

BIM-EPIC provides three utilities for displaying and updating your VTOC entries. TSIDLVT

lists VTOC entries in batch mode. TVTO displays them online. TSIDVUT allows you to

modify existing VTOC entries.

Disk Pooling

Leveling

Offload Utilities

VTOC Utilities

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 488 489

Comentários a estes Manuais

Sem comentários

Memorex LOCK - VERSION 2-24 Especificações Página 45

Comentários a estes Manuais