/XRL/10

 

 

 

 

 

482, 482, 483

IMPF

2043CH32

 

 

 

 

 

 

 

 

515

32.6,

Implementation Phases

 

 

 

 

 

482, 483

CNVSRVS

2043CH33

 

 

 

 

 

 

 

 

519

33.1,

Conversion Services

 

 

 

 

 

519

 

CNVTOOL

2043CH33

 

 

 

 

 

 

 

 

520

33.2,

Conversion Tools

 

 

 

 

 

483, 519

MIGEXMP

2043IMBD

 

 

 

 

 

 

 

 

527

Part

8, Migration Experience

 

 

 

 

 

3, 4

 

MIGEXP1

2043CH34

 

 

 

 

 

 

 

 

529

Chapter 34,

Customer Migration Example

 

 

 

 

 

483

 

APPXS

2043IMBD

 

 

 

 

 

 

 

 

533

Part

9, Appendixes

 

 

 

 

 

4

 

 

AX2

2043AX01

 

 

 

 

 

 

 

 

535

Appendix

A,

Education Information

 

 

 

 

 

31, 69, 481

HMAX21

2043AX02

 

 

 

 

 

 

 

 

539

Appendix

B,

Mapping ISV Products and Functions

DSNAMES

2043AX03

 

 

 

 

 

 

 

 

543

Appendix

C,

DFSMS Naming Conventions

 

 

 

 

 

481, 483, 494, 500

NOTICES

SG242043 SCRIPT

 

 

 

 

 

 

 

 

553

Appendix

D,

Special Notices

 

 

 

 

 

ii

 

 

BIBL

2043BIBL

 

 

 

 

 

 

 

 

557

Appendix

E,

Related Publications

 

 

 

 

 

401

 

REDBCDR

REDB$BIB

 

 

 

 

 

 

 

 

559

E.5, Redbooks on CD-ROMs

ORDER

REDB$ORD

 

 

 

 

 

 

 

 

561

How to Get ITSO Redbooks

 

 

 

 

 

557

 

REDBIBM

REDB$ORD

 

 

 

 

 

 

 

 

561

How IBM Employees Can Get ITSO Redbooks

REDBCUS

REDB$ORD

 

 

 

 

 

 

 

 

562

How Customers Can Get ITSO Redbooks

REDBFOR

REDB$ORD

 

 

 

 

 

 

 

 

563

IBM Redbook Order Form

REDBEVA

REDB$EVA

 

 

 

 

 

 

 

 

593

ITSO Redbook Evaluation

 

 

 

 

 

xxii

 

 

 

 

 

 

 

 

 

 

Index Entries

 

 

 

 

 

 

id

File

Page

References

 

C050001

2043VARS

 

 

 

 

 

 

 

 

i

(1)

access method

 

 

 

 

 

97, 97, 98, 98, 99, 455

C300009

2043VARS

 

 

 

 

 

 

 

 

i

(1)

accounting

 

 

 

 

 

223, 223, 224, 471, 471, 472, 472

C090002

2043VARS

 

 

 

 

 

 

 

 

i

(1)

ACF/NCP

 

 

 

 

 

 

192, 192, 193

C090001

2043VARS

 

 

 

 

 

 

 

 

i

(1) ACF/VTAM

 

 

 

 

 

186, 187, 190, 191

C130001

2043VARS

 

 

 

 

 

 

 

 

i

(1)

Assembler Products

 

 

 

 

 

268, 283, 287, 289, 290, 292

C300008

2043VARS

 

 

 

 

 

 

 

 

i

(1)

asset management

 

 

 

 

 

471, 471, 471

C090003

2043VARS

 

 

 

 

 

 

 

 

i

(1)

BTAM

 

 

 

 

 

 

 

193, 193

C260005

2043VARS

 

 

 

 

 

 

 

 

i

(1) building the initial OS/390 test system

 

 

 

 

 

431, 431, 431

C300002

2043VARS

 

 

 

 

 

 

 

 

i

(1)

change management

 

 

 

 

 

460, 460, 461

C150006

2043VARS

 

 

 

 

 

 

 

 

i

(1) Checkpoint-Restart in PL/I

 

 

 

 

 

342, 342, 343

C170006

2043VARS

 

 

 

 

 

 

Page 656
Image 656
IBM OS/390 manual XRL/10

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.