systems management (continued) summary 472

Systems Management Recording printing SMF records 395

T

tailoring JES2 211

tailoring other components 416 tape

differences 103 drives 404

file definition 297 labels 330 similarities 103 spooling 208, 216 storage considerations 97

tape similarities & differences

bypass label processing facility in OS/390 106 no labels 105

nonstandard labels 106 standard labels

standard user labels 105 volume interchangeability 103

task management commands 232 task quantity 9

tasks accounting management 472

TCP/IP applications 195

applications using BSD/C sockets 196 applications using LE/VSE C socket API 196 applications using Preprocessor API 196 attached printers 237

batch jobs 195 configuration 195 customization 195 network definitions 194 related user data 195 security 196

standard applications 195 telecommunications subsystems 185 TERMINAL 337

terminal access 404

terminal access to OS/390 414 terminal execution 161 terminating COBOL programs 257 termination 269

terminology 419 test

activities 430 considerations 153 converted applications 506 differences in testing philosophy 419 environment introduction 419 logical partition 431

philosophy 419 plan 508 summary 430

systems during migration 420

test (continued) techniques JES2 225 terminology 419

The Source Recovery Company 525 THEN statement 84

time event scheduling 214

time event scheduling for jobs 208 time sharing user control 451 TLBL statement 82

TME 10 23

TME 10 Netview 467 TME 10 OPC 468 tools 244

TOTAL option 340 trace analysis 474 traces 474

track & record addressing 315 track addressing 315 tracking jobs 441

traditional reasons for migrating 4 training - instructors 537 training - where and when 537

custom classes 536

OEM product education 536 OS/390 classes 535 required 535

transaction

attributes for CICS 144 management 182 security 149

server 133

transferring print streams 241 translator option for CICS 252 trial conversions 505 TRUNC macro 300, 306 TSO/E 155

and REXX 369 broadcast data set 157 command procedures 163 controlling users 451 data set name 159 environment 371 extended MCS consoles 445 functions 445

ISPF and SDSF 437 logon procedures 157 message facilities 157 naming conventions 549 program execution 161 security 157 summary 158

system access 159 user profiles 155

TTIMER macro 288

two phase approach 42, 486

Index 617

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Image 641
IBM OS/390 manual Index

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.