/XRL/7

AFPPSF

2043CH11

 

 

 

 

 

235

Chapter 11,

Advanced Function Printing and Print Services

 

 

Facility/MVS

 

 

 

 

17, 17, 215

PSFINCN

2043CH11

 

 

 

 

 

236

11.2,

Installing and Configuring PSF/MVS

 

 

 

 

236

 

PSFRES

2043CH11

 

 

 

 

 

240

11.3,

Setting up AFP Resources

 

 

 

 

236

 

PSFAPPL

2043CH11

 

 

 

 

 

241

11.3.4, Migrating Print Applications

 

 

 

 

236

 

AFPPPM

2043CH11

 

 

 

 

 

241

VSE Printer PARM Macro

PSFOPS

2043CH11

 

 

 

 

 

242

11.4,

 

Understanding Operational Differences

 

 

 

 

236

 

PSFOTH

2043CH11

 

 

 

 

 

243

11.5,

 

Other Differences

 

 

 

 

236

 

PSFREFS

2043CH11

 

 

 

 

 

244

11.6,

 

References

AFPTOOL

2043CH11

 

 

 

 

 

244

11.6.5, Tools

 

 

 

 

 

240

 

CVLANG

2043IMBD

 

 

 

 

 

247

Part

3, Converting VSE Languages to OS/390 Languages

 

 

 

 

3, 3, 17, 17, 482

COBOL

2043CH12

 

 

 

 

 

249

Chapter 12,

COBOL

 

 

 

 

17, 17, 131, 131, 355, 356

VMC

2043CH12

 

 

 

 

 

250

12.2,

VSE to OS/390 Migration Considerations

 

 

 

 

258, 259, 259, 354

DOSCV

2043CH12

 

 

 

 

 

252

12.3, Converting from DOS/VS COBOL

 

 

 

 

251

 

VSCB2CV

2043CH12

 

 

 

 

 

258

12.5,

Converting from VS COBOL II

 

 

 

 

251

 

ASMBLR

2043CH13

 

 

 

 

 

267

Chapter 13,

Assembler

 

 

 

 

17, 17, 82, 131, 359

TRM

2043CH13

 

 

 

 

 

269

13.2.1.2, Termination

 

 

 

 

281

 

REGCONV

2043CH13

 

 

 

 

 

269

Register Conventions

 

 

 

 

289

 

COMREG

2043CH13

 

 

 

 

 

274

13.2.1.3, Communication Region

 

 

 

 

277

 

LDMAC

2043CH13

 

 

 

 

 

277

LOAD Macro

 

 

 

 

 

272

 

GTIME

2043CH13

 

 

 

 

 

278

GETIME Macro

 

 

 

 

277

 

DMPMAC

2043CH13

 

 

 

 

 

280

DUMP Macro

 

 

 

 

281

 

ROUTHDL

2043CH13

 

 

 

 

 

287

Routine Handling

 

 

 

 

288

 

VSMACS

2043CH13

 

 

 

 

 

290

13.2.5, VSAM Macros

 

 

 

 

268

 

DMMACS

2043CH13

 

 

 

 

 

292

13.2.6, Data Management Macros

 

 

 

 

268

 

RPG

2043CH14

 

 

 

 

 

329

Chapter 14,

RPG II

 

 

 

 

17, 17

 

PLI

2043CH15

 

 

 

 

 

333

Chapter 15,

PL/I

 

 

 

 

17, 17, 354, 356

STMPLI

2043CH15

 

 

 

 

 

345

15.11,

Storage Management in PL/I

 

 

 

 

337

 

FORTRAN

2043CH16

 

 

 

 

 

349

Chapter 16,

FORTRAN

 

 

 

 

17, 17

 

LE

2043CH17

 

 

 

 

 

351

Chapter 17,

Language Environment (LE)

Page 652 Page 654
Page 653
Image 653
IBM OS/390 manual XRL/7
Page 652 Page 654

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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