Batch TCP/IP 195 unit testing, Psf/Mvs

batch (continued) TCP/IP 195 unit testing 512

BCP customization 415

B D A M 98

benefits customer migration 532 bibliographies

COBOL 251

diagnostic reference 478 Language Environment 353 MQSeries 206

PSF/MVS 244

PSF/VSE 244 REXX 372

bibliography 557 BLKSIZE definition 293 BLL cells 252

book synopsis 3 broadcast data set 157 BSC remotes definition 228 BTAM 137, 193

product installation 193 usage 193

building the initial OS/390 test system 430 maintenance environment 431

test logical partition 431

user libraries and SMP/E zones 431 business consolidation 4

bypass label processing facility in OS/390 106

C for VSE/ESA 353

C/370 355

CA-Convertor 525 CA-DUO 525 callable services 365

calling COBOL subprograms 331 CALLing DUMP 346

CANCEL macro 281 capacity constraints 5 card file definition 294 carry-over 79

CAT on DLBL 83 catalog 81, 112, 335

compatibility 117 conversion 118 forward recovery 111 IKQVCHK check 125 management 114 master 114

OS VOL 110

OS/390 110 recovery 476

shared volume ownership 120 sharing 432

structures 120 user 115 VSAM 110

CBPDO 407

CCB macro 327

CCCA 522

CCCA positioning 523

CCCA technical description 523 CCYY format definition 567 CDDELETE macro 278 CDLOAD macro 278 CEETDLI 366

century byte definition 568 century definition 568 CGI programs 196

change management 411, 460 methodology 461 overview 460

tasks 460

changes between VSE and OS/390 automation 25

console operator interface 25 JCL processing 25 management disciplines 25 philosophical changes 24 security 24

channel-attached printers 236 CHECK macro 307

checking VSAM KSDS files 477 checkpoint JES2 210 Checkpoint-Restart in PL/I 342

PLICANC 343

PLICKPT 342

PLIREST 342

CHKP calls 172

CHKPT macro 282

CICS

adapter 201

application programming 150 CCCA 522

CICS/VSE & TS coexistence 153 COBOL and CICS 366

Command Level Conversion Aid (CCCA) 522 COMMAREA 152

considerations - MQSeries 201 CSD & RDO considerations 143 DL/I 154

domains 138

DOS/VS COBOL programs 252 essential supplemental migration support

material 134 exits 147

general compatibility comments 135 general system considerations 136 internal security 137 introduction 133

log manager 145

Macro Resource Definition Table changes 140 menu service 151

MQSeries considerations 201 MRDT changes 140

594VSE to OS/390 Migration Workbook

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.

IBM OS/390 manual Batch TCP/IP 195 unit testing, Psf/Mvs, Plicanc Plickpt Plirest

Models: OS/390