Manuals / IBM / Computer Equipment / Server

IBM OS/390 manual Index Special Characters, 591, Acf/Vtam

Models: OS/390

1 673
Download 673 pages 53.75 Kb
Page 615
Image 615

Index

Special Characters

*$$ DATA 89

*$$ LST 89 &SYSNAME 115 %INCLUDE 335

Numerics

2-digit-year format definition 565 20th century definition 565 21st century definition 565 24x7 installations 485

4-digit-year format definition 565

A

abbreviations

583

 

 

 

 

ABEND forcing

344

 

 

 

 

ABEND macro

280

 

 

 

 

abnormal termination exits

364, 365, 367

ACB

 

 

 

 

 

 

 

additional MVS VSAM parameters

290

macro

290

 

 

 

 

 

multiple string processing

128

 

MVS VSAM parameters

290

 

single Open

128

 

 

 

 

access method

97, 549

 

 

differences

97

 

 

 

 

IDCAMS

455

 

 

 

 

implementations

98

 

 

miscellaneous functions

99

 

operating system implementations

98

similarities

97

 

 

 

 

ACCESS statement

170

 

 

access to NetView FTP

415

 

 

accessing the system

159

 

 

accounting

244

 

 

 

 

comparisons

223

 

 

 

JES2 SMF records

223

 

 

management

471

 

 

 

methodology

472

 

 

 

NJE

224

 

 

 

 

 

overview 471

 

 

 

 

tasks

472

 

 

 

 

 

ACF/NCP

 

192

 

 

 

 

 

backlevel hardware support 193

 

product installation

192

 

 

program generation

192

 

 

ACF/VTAM

185

 

 

 

 

customization and programming

 

programming

191

 

 

VTAM tables

190

 

 

network configuration 191

 

product installation

 

 

 

VTAM data sets

186

 

 

ACF/VTAM (continued)

resource definition and operation operation 190

resource definition 190 acronyms 583

actual conversion 516 additional switchover tasks 518 Advanced Function Printing (AFP) 235

migration effort 235 programming interfaces 242 resource definition 240 resource migration 240 resources setup 240

allocation of resources 78 allocation spool space 221

ALTER REMOVEVOLUMES function 125 alternate DL/I & IMS/ESA access 175 AMS CNVCAT command 118

AMS commands 121

analysis & resolution of exceptions 496 analyzing

catalogs 476 dumps 473 traces 474

VSE source material 500 application

availability 10 developer 179 interfaces 221

interlanguage communications 358 inventory 32, 495

ISPF 440

load table 137 location 548 programmers 47 programming 150 shared files and code 50 synchronization 430 TCP/IP 196

APPLY clause 255

applying preventive service 414 approach differences 49 approaches to migration

conversion & production implementation strategies 27

conversion tools 30 disclaimer 27

in-house staff 29 kernel/progressive approach 27 outside consultants 30

single switchover - mass application migration 28 staffing strategies 29

VM/ESA guest support 29

© Copyright IBM Corp. 1998

591

Page 614 Page 616
Page 615
Image 615
IBM OS/390 manual Index Special Characters, 591, Acf/Vtam
Page 614 Page 616

OS/390 specifications

IBM OS/390, a versatile operating system, was a cornerstone in enterprise environments and played a pivotal role in mainframe computing. Released in the mid-1990s, OS/390 combined the strengths of IBM's MVS (Multiple Virtual Storage) with new features and enhancements, targeting scalability, reliability, and performance in demanding business applications.

One of the key features of OS/390 was its robust support for multiple users and processes. The system allowed thousands of concurrent users to access applications and data, ensuring high availability and minimizing downtime—a critical requirement for many large organizations. This scalability was supported through various enhancements in memory management and processor scheduling, enabling optimal resource allocation across diverse workloads.

OS/390 was known for its superior workload management capabilities. The Workload Manager (WLM) component allowed administrators to define service policies, specifying how system resources would be allocated according to the priority of tasks. This ensured that critical business processes received the necessary resources while less critical tasks were managed more flexibly.

Another significant characteristic of OS/390 was its commitment to security. The operating system provided comprehensive security features, including user authentication, data encryption, and auditing capabilities. This focus on security was vital for organizations handling sensitive data, ensuring compliance with regulations and safeguarding against unauthorized access.

OS/390 also supported advanced technologies that facilitated integration and development. The system included features like the IBM CICS (Customer Information Control System) for transaction processing and IMS (Information Management System) for database management. These technologies allowed organizations to build robust, high-performance applications tailored to specific business needs.

The ease of network integration was another strength of OS/390. With the advent of the Internet and global connectivity, OS/390 systems could easily interface with various network protocols, enabling businesses to operate in a connected world. This inclusion paved the way for many organizations to expand their capabilities and offer new services, driving digital transformation.

In conclusion, IBM OS/390 represented a significant advancement in mainframe technology, combining scalability, security, and robust workload management. Its rich feature set and support for critical enterprise applications solidified its role as a vital component of many organizations' IT infrastructures, ensuring they could meet their operational challenges head-on while supporting future growth. As technology continues to evolve, the legacy of OS/390 remains influential in the realm of computing.