/XRL/12

 

 

 

72, 73

C040004

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JECL

 

 

 

89, 89, 89, 90

C100003

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JES2/POWER functional comparison

 

 

 

212, 213, 215, 218, 219, 220, 221, 223, 224, 225

C170001

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Language Environment (LE)

 

 

 

196, 351, 351, 352, 352, 352, 353, 353, 353, 354, 359,

 

 

 

359, 365, 366

C150003

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linkages between languages

 

 

 

338, 338

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managing remote operations

 

 

 

452, 453

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migrating from LE/VSE

 

 

 

359, 364, 365, 366

C170003

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migrating from LE/VSE-conforming languages

 

 

 

353, 354, 354

C170004

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migrating from non-LE/VSE run-time environments

 

 

 

354, 355, 355, 356, 356, 358, 358, 359

C070005

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migrating from VSE/ICCF to MVS and TSO/E

 

 

 

163, 167

C090004

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migrating TCP/IP

 

 

 

194, 195, 195, 195, 195, 196, 197

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MQSeries

 

 

 

198, 198, 203, 203, 203, 203, 205, 205, 206

C300005

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operations management

 

 

 

465, 465, 466, 467

OPLOIND

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OPERLOG

 

 

 

394

C290001

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orientation for utilities

 

 

 

455, 455, 455, 455, 456

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OS/390 software - order and install

 

 

 

405, 405, 405, 406

C260004

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parallel activities

 

 

 

430, 430, 430

C300004

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performance management

 

 

 

463, 463, 464

C150001

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PL/I

 

 

 

333

C150012

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PL/I and CICS

 

 

 

346, 346, 346, 346, 346, 346, 347, 347

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PL/I calling SORT

 

 

 

340, 340

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PL/I compiler options

 

 

 

335, 336, 337, 338

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PL/I forcing an ABEND

 

 

 

344, 345

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PL/I overlay structures

 

 

 

345, 345

C100004

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POWER/JES2 detailed comparisons

 

 

 

225, 230, 231

C070001

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preparing to use the system

 

 

 

155, 157, 157, 157, 158

C300003

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problem management

 

 

 

461, 462, 462

C180001

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procedure language REXX

 

 

 

369, 369, 369, 369, 371, 371

C110005

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PSF/MVS

Page 657 Page 659
Page 658
Image 658
IBM OS/390 manual XRL/12, Oploind, Operlog
Page 657 Page 659

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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