/XRL/9

 

407

25.4, Set Up Standards, Procedures, and Documentation

 

 

 

 

100, 481

PUTRSU

2043CH25

 

 

 

 

414

25.5.1.2, Applying Preventive Service

 

 

 

 

411

SETERM

2043CH25

 

 

 

 

414

25.5.1.3, Providing Terminal Access to the OS/390 System

 

 

 

 

404

SETNJE

2043CH25

 

 

 

 

415

25.5.1.5, Providing NJE Connection to the OS/390 System

 

 

 

 

405

TESTENV

2043CH26

 

 

 

 

419

Chapter 26, Test Environments

 

 

 

 

482

RUNSYS

2043IMBD

 

 

 

 

435

Part

6, Running Your OS/390 System

 

 

 

 

3, 3, 4, 482

TSOISPF

2043CH27

 

 

 

 

437

Chapter 27, Orienting ICCF Users to TSO/ISPF

 

 

 

 

17, 17, 481

390CNSL

2043CH28

 

 

 

 

443

Chapter 28, Orientation to OS/390 Console Operation

 

 

 

 

17, 17, 209, 411, 481

OPERRJE

2043CH28

 

 

 

 

452

28.6.1,

JES2 RJE Operations

 

 

 

 

220

OPERNJE

2043CH28

 

 

 

 

453

28.6.2,

NJE Operations

 

 

 

 

221

UTILS

2043CH29

 

 

 

 

455

Chapter 29, Orientation for Utilities

 

 

 

 

244, 373, 481

SYM00

2043CH30

 

 

 

 

457

Chapter 30, Systems Management Philosophy and

 

 

Methodology

 

 

 

 

17, 17, 409

SYM01

2043CH30

 

 

 

 

457

30.1, The Philosophy of Systems Management

 

 

 

 

457

SYM02

2043CH30

 

 

 

 

460

30.2, Change Management

 

 

 

 

457

SYM03

2043CH30

 

 

 

 

461

30.3, Problem Management

 

 

 

 

457

SYM04

2043CH30

 

 

 

 

463

30.4, Performance Management

 

 

 

 

457

SYM05

2043CH30

 

 

 

 

465

30.5, Operations Management

 

 

 

 

457

SYM06

2043CH30

 

 

 

 

468

30.6,

Security Management

 

 

 

 

457

SYM07

2043CH30

 

 

 

 

469

30.7,

Configuration Management

 

 

 

 

457

SYM08

2043CH30

 

 

 

 

471

30.8, Asset Management

 

 

 

 

457

SYM09

2043CH30

 

 

 

 

471

30.9, Accounting Management

 

 

 

 

457

DIGPRBS

2043CH31

 

 

 

 

473

Chapter 31, Diagnosing System Problems

 

 

 

 

482

CNVAPLS

2043IMBD

 

 

 

 

479

Part

7, Converting your Applications

 

 

 

 

3, 4

CONVPRC

2043CH32

 

 

 

 

481

Chapter 32, Conversion Process

CPOV

2043CH32

 

 

 

 

482

32.1,

Conversion Process Introduction

 

 

 

 

483

MHIST

2043CH32

 

 

 

 

486

32.2, Mass Conversion - Background, Benefits and Method

 

 

 

 

483

POVIEW

2043CH32

 

 

 

 

493

32.3, Mass Conversion Phase Overview

 

 

 

 

483

PREPF

2043CH32

 

 

 

 

493

32.4,

Preparation Phases

 

 

 

 

481, 483

CONVF

2043CH32

 

 

 

 

503

32.5,

Conversion Phases

Page 654 Page 656
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IBM OS/390 manual XRL/9
Page 654 Page 656

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.
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