CA Dynam for VSE User Guide

Chapter 6: Controlling File
Independence
Introducing CA Dynam/FI
CA Dynam/FI provides a comprehensive file independence facility for VSE
users. It is an integral part of the CA Dynam file management system, and
shares many common components with CA Dynam/T and CA Dynam/D.
"File independence" offers the VSE user the facility to define a sequential
access file in a program and then redefine this file at execution time (changing
device types, block sizes, and so on) without having to make any changes to
the program.
Because CA Dynam/FI dynamically defines the file at execution time, you do
not need to worry about the physical file type.
The facilities of the CA Dynam/FI system include the following:
• Unit record simulation
• Job exit facility
• Catalog management
• Audit trail facility
• Dynamic file sorting through CA SRAM
• Input file concatenation
Unit record simulation allows any unit record device (card reader, printer, card
punch) to be simulated as a tape, sequential disk or VSAM file.
The job exit facility is used to activate CA Dynam/FI options. It lets you
optimize block size, change record format, change unlabeled tape files to
labeled tape files, and specify double buffering.
Catalog management permits you to define CA Dynam/FI options in the
Catalog file. You can define and store file attributes such as block size, record
format, tape options and buffering techniques for cataloged data sets.
The audit trail facility records functions performed by CA Dynam/FI and can be
used to prepare reports on these functions.
Chapter 6: Controlling File Independence 6–1