Auditing Considerations

Auditors

who are

responsible for

ensuring

proper

access

control and a

for their installation are interested in

changes

to security

options,

report

generation

utilities.

 

 

 

 

 

For more

information, see Chapter 8,

“Auditing Considerations”

on

page 33

Application Development Considerations

Application

development

programmers

must

be

aware of

new

functions intro

in a new release of RACF. To implement a

new

function,

the

application

development

personnel

should read

this

book

and

the

following

books:

ŸOS/390 Security Server External Security Interface (RACROUTE) Macro Reference

Ÿ

OS/390

Security

Server

(RACF)

Data

Areas

Ÿ

OS/390

Security

Server

(RACF)

Macros

and Interfaces

To ensure that existing programs run as before, the application progr should be aware of any changes in data areas and processing requi book provides an overview of the changes that might affect existing programs.

For more information, see Chapter 9, “Application Development Considerations page 35.

General User Considerations

RACF general users use a RACF-protected system to:

Ÿ Log on to the system

Ÿ Access resources on the system

ŸProtect their own resources and any group resources to which the administrative authority

This book provides an overview of the changes that might affect exi procedures for general users. For more information, see Chapter 10, “G Considerations” on page 37.

Chapter 1. Planning for Migration3

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IBM OS/390 Auditing Considerations, Application Development Considerations, General User Considerations, Macros Interfaces

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.