POWER/JES2 detailed comparisons (continued) POWER/JES2 command equivalences

control commands 233 file control 234

network management 233 NJE operator commands 233 queue management commands 232 sending commands & messages 234 task management commands 232

preparation phases 493

OS/390 standards & naming conventions 497 Phase 0: project management & technical

leadership

project planning & orientation 494

Phase 1: application inventory

analysis & resolution of exceptions 496

collection

496

 

 

 

 

determination

496

 

 

 

supply

496

 

 

 

 

 

Phase 2: conversion specifications

analyze VSE source material

500

design MVS target output

501

determine source/target method 501

Phase 3: customization/development of conversion

tools

 

 

 

 

 

 

 

manual OS/390 conversion

502

VSE positioning

502

 

 

 

prepare the migration environment

401

preparing to use the system

 

 

logon procedures

157

 

 

 

message facilities

157

 

 

 

security

157

 

 

 

 

 

 

summary

158

 

 

 

 

 

user profiles

155

 

 

 

 

prerequisites

198

 

 

 

 

 

preventive service

414

 

 

 

print application migration

241

 

 

print files 329

 

 

 

 

 

 

Print Services Facility/MVS

235

 

 

print stream coexistence

241

 

 

PRINTDEV parameter comparison

 

238

PRINTDEV statements

238

 

 

printer

 

 

 

 

 

 

 

features

235

 

 

 

 

 

 

file definition

296

 

 

 

 

forms alignment via PSETUP

208, 217

Parm macro

241

 

 

 

 

resident fonts

 

240

 

 

 

SNA-attached

 

236

 

 

 

supported

216, 235

 

 

 

TCP/IP attached

237

 

 

 

printing

 

 

 

 

 

 

 

from TSO

241

 

 

 

 

 

log streams

393

 

 

 

 

OPERLOG

394

 

 

 

 

 

SMF records

395

 

 

 

 

softcopy books

412

 

 

 

SYSLOG

394

 

 

 

 

 

PRINTLOG utility

393

 

 

 

 

 

 

problem determination considerations

153

problem determination tools

473

 

 

 

problem management

411, 461

 

 

 

methodology

 

462

 

 

 

 

 

 

overview

461

 

 

 

 

 

 

 

tasks 462

 

 

 

 

 

 

 

 

 

problem program area addresses

275

 

 

PROCEDURE DIVISION - Input/Output

256

procedure language REXX

 

 

 

 

 

environments

 

 

 

 

 

 

 

 

TSO/E Environment 371

 

 

 

 

VM/ESA environment

370

 

 

 

VSE/ESA environment

370

 

 

 

migration issues

371

 

 

 

 

 

REXX and TSO/E

369

 

 

 

 

 

REXX and VM/ESA 369

 

 

 

 

 

REXX and VSE/ESA

369

 

 

 

 

 

REXX Exec samples

371

 

 

 

 

 

procedures

81, 407

 

 

 

 

 

 

 

procedures, nested

72

 

 

 

 

 

 

PROCESS card

 

338

 

 

 

 

 

 

 

processing a DAM File under MVS

324

 

processing a DAM File under VSE

324

 

 

processing options

330

 

 

 

 

 

processor requirements

402

 

 

 

 

product areas

182

 

 

 

 

 

 

 

product installation

186, 192, 193

 

 

 

program

 

 

 

 

 

 

 

 

 

 

conversion

33, 503

 

 

 

 

 

 

final conversion

517

 

 

 

 

 

generation

 

192

 

 

 

 

 

 

 

source code example

526

 

 

 

 

specification block (PSB)

171

 

 

 

termination

 

257

 

 

 

 

 

 

 

programmable spool interfaces

221

 

 

programming

 

191

 

 

 

 

 

 

 

programming elements

327

 

 

 

 

 

programming interfaces HLL

242

 

 

 

progressive versus mass conversion

 

 

approach differences

49

 

 

 

 

 

automated operations tools

50

 

 

 

complexity of implementation

 

 

 

mass migration as conversion method 52

mass migration as conversion tool

52

historical perspective

50

 

 

 

 

 

operations support staffing

50

 

 

 

risk management

51

 

 

 

 

 

shared application code

50

 

 

 

 

shared application files and databases

50

standardized conversion deliverables &

 

automation

 

51

 

 

 

 

 

 

 

project

 

 

 

 

 

 

 

 

 

 

management

 

37, 41, 440, 484

 

 

 

manager

46

 

 

 

 

 

 

 

 

migration cost elements

39

 

 

 

 

plan details

 

58

 

 

 

 

 

 

 

plan example

56

 

 

 

 

 

 

 

612VSE to OS/390 Migration Workbook

Page 636
Image 636
IBM OS/390 manual SMF records 395 Softcopy books 412, Syslog

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.