CA Dynam for VSE User Guide

Chapter 4: Disk File Management
CA Dynam/D is a software system providing disk data set management for
IBM and compatible mainframe computers operating under all releases of VSE
currently supported by IBM. This chapter deals with the basic components of
CA Dynam/D. For more information about using the utilities that support disk
management, see the chapter "Supporting Disk File Management."
CA Dynam/D provides the following benefits:
• Basic disk space management
• Catalog management
• Device independence shared DASD for multiple CPU support
• Disk pool management
• BACKUP/RESTORE utility
• VTOC management with support for both indexed and nonindexed VTOCs
Disk space management is the dynamic allocation of disk space on a specified
disk volume. You specify the amount of space required for a file, and
CA Dynam/D automatically finds the available disk space and allocates it.
CA Dynam/D also releases unused disk space when the file is closed.
Catalog Management is the CA Dynam facility for accessing a file using only
the file ID supplied through VSE Job Control. With the CA Dynam Catalog
Management facility, you can define or alter the allocation attributes of disk
files without modifying JCL statements. This provides more power and
flexibility in controlling DASD file attributes.
Disk pool management lets you specify a pool of disk volumes to be used for
disk space allocation. It also provides for a balanced allocation of space across
multiple disk volumes.
With the CA Dynam/D DYNUTIL program, you can save and restore any DASD
file to and from tape.
Shared DASD for multiple CPUs enables you to share disk space allocations
from among multiple CPUs. Each CPU may or may not have CA Dynam/D
processing and accessing a common disk pack.
Chapter 4: Disk File Management 4–1