Cortex-Ms, Dadsm Dasd | IBM OS/390 instruction

conversion phases (continued) unit testing (continued)

timing between on-line & batch testing 512 conversion process

assumptions 486 introduction 482 prerequisites 484 recommendations

24x7 installations 485 manuals 484

migrate SNA network 485 project management 484 secure OS/390 skills 484 tools & automation 484 two phase approach 486

references 483 conversion services

Automated Migration Services (AMS) 519 IBM global services 519

conversion tools 30 Computer Associates

CA-Convertor 525 CA-DUO 525

CORTEX-MS 43, 52, 486, 490

IBM COBOL and CICS CCCA product positioning 523 technical description 523

IBM OPTI-AUDIT for VSE product details 521 product highlights 521

SISRO - CORTEX-Migration System

(CORTEX-MS) 524

The Source Recovery Company

COBOL recovery example 526

program source code example 526

Reconcile/SRC 526

Recovery/SRC 526

Rename/SRC 526

VersionMatch/SRC 526

VSE/ESA facilities 520 converting

development material 516

DOS/VS COBOL CICS programs 252 from COBOL for VSE/ESA 259 from DOS/VS COBOL 252

from VS COBOL II 258 ICCF libraries 163 PL/I programs 345

REPORT WRITER statements 253

VS COBOL II CICS programs 259

correcting invalid syntax 76 CORTEX-MS 43, 486, 490 cosmetic definition 568 cost considerations 38 COUNT FLOW 337 courses

available 535 instructors 537

courses (continued) locations 537 schedules 536 when needed 536

creating emergency backup system 410 creating ISPF applications 440

critical operations procedures 411

cross-region sharing - single CPU environment 126 cross-system coupling facility 189

cross-system sharing 129 CSD considerations 143 custom classes 536 customer migration example

background 529 duration

phase one 531 phase two 531

environment hardware 529 inventory 530 resources 530 software 529

customer migration rationale business consolidation 4 capacity constraints

n-way processor support 9 task quantity 9

virtual storage 5 image 9 mergers/acquisitions 5 traditional reasons for migrating 4

customization and programming 190 customize MVS BCP 415 customize OS/390 system 413

DADSM 99

DASD

and tape volume serials 408 concurrent access 16 cross-system sharing 129 differences 108

FBA 108, 120

indexed VTOC considerations (OS/390) 109 OS/390 sharing definitions 129 requirements 402, 508

sequential file definition 304 shared 404, 425

shared between VSE & OS/390 (vs. cloned DASD) 433

shared vs. cloned 432

sharing between OS/390 test systems 432 sharing between VSE & OS/390 433 sharing considerations 130

similarities 108

volume interchangeability 108 volume serials 408

VTOC processing 108

Index 597

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 Cortex-Ms, Courses locations 537 schedules 536 when needed, Dadsm Dasd

Models: OS/390