/XRL/1

 

 

 

Artwork Definitions

 

 

 

 

id

File

Page

References

WOLOGO

2043SU

 

 

 

 

i

 

WOLOGOS

2043SU

 

 

 

 

i

 

TILOGO

2043SU

 

 

 

 

i

 

TILOGOS

2043SU

 

 

 

 

i

 

 

 

 

Table Definitions

 

 

 

 

id

File

Page

References

COBCMP

2043VARS

 

 

 

 

i

i, i, i, i, i, 250

HDR1

2043VARS

 

 

 

 

i

 

LPUBS1R

2043VARS

 

 

 

 

i

i, 353

LPUBS1H

2043VARS

 

 

 

 

i

353

MAINTB

2043VARS

 

 

 

 

i

 

MVSFB

2043VARS

 

 

 

 

i

 

MVSFBK

2043VARS

 

 

 

 

i

 

ONE

2043VARS

 

 

 

 

i

 

PLNBOD1

2043VARS

 

 

 

 

i

i, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54,

 

 

 

54, 54, 54, 54, 55, 55, 55, 55

PLNBOD2

2043VARS

 

 

 

 

i

i, 54

PLNHDR

2043VARS

 

 

 

 

i

54, 54, 55, 55

PUBS1R

2043VARS

 

 

 

 

i

i, 251

PUBS1H

2043VARS

 

 

 

 

i

252

ROW1

2043VARS

 

 

 

 

i

250

ROW2

2043VARS

 

 

 

 

i

250

ROW3

2043VARS

 

 

 

 

i

250

ROW4

2043VARS

 

 

 

 

i

250

ROWCAP

2043VARS

 

 

 

 

i

250

TAB1

2043VARS

 

 

 

 

i

257

TAB2

2043VARS

 

 

 

 

i

257, 257, 257

TAB4

2043VARS

 

 

 

 

i

363, 363

TAB5

2043VARS

 

 

 

 

i

363, 363

TAB6

2043VARS

 

 

 

 

i

367, 367

TAB7

2043VARS

 

 

 

 

i

367, 367

TABC

2043VARS

 

 

 

 

i

363, 363

TABH

2043VARS

 

 

 

 

i

363, 363

TABP

2043VARS

 

 

 

 

i

364

TWO

2043VARS

 

 

 

 

i

 

VENPSB

2043VARS

 

 

 

 

i

i, 539, 539

VENPSH

2043VARS

 

 

 

 

i

539

WHOBOD

2043VARS

 

 

 

 

i

i, 26, 26

WHOHDR

2043VARS

 

 

 

 

i

26

Page 647
Image 647
IBM OS/390 manual XRL/1

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.