Systems Migration: A Complete Reference

Overview

Migrating applications and systems from one computing environment to another is as complex a process as any in the area of computer systems development. The migration process combines the most difficult aspects of new systems development with those of systems maintenance, and puts these areas into a tightly constrained environment that invariably parallels existing business operations. In addition to the obvious tasks of modifying computer code and control procedures, there are numerous other aspects to the ...
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Overview

Migrating applications and systems from one computing environment to another is as complex a process as any in the area of computer systems development. The migration process combines the most difficult aspects of new systems development with those of systems maintenance, and puts these areas into a tightly constrained environment that invariably parallels existing business operations. In addition to the obvious tasks of modifying computer code and control procedures, there are numerous other aspects to the migration process. As organizations begin to implement the major trends in today's information systems - client/server computing, open systems, enterprise computing, and others - the orderly transition from existing information systems into some new form becomes even more important. Systems Migration: A Complete Reference discusses the many aspects of the migration process. In addition to the many technical aspects of migration - databases, networks, system software, and other areas are discussed - the book places a great deal of emphasis on the analysis and planning process. Numerous checklists and questionnaires are included that can be directly used by the reader. Additionally, a sample migration plan is also included that can be easily adapted to fit the transition plans of nearly any organization. For anyone currently undergoing - or planning to undertake - a migration effort, regardless of the complexity, this information-packed book provides an indispensable reference of practical information.

This is a hands-on guide designed to take the terror out of system and software migration. The author dissects and analyzes the critical steps to planning and executing systems migration, and teaches the reader how to move through the periods of interoperability to reach the goal of full migration with minimal disruption.

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Product Details

  • ISBN-13: 9780442308537
  • Publisher: Wiley, John & Sons, Incorporated
  • Publication date: 12/1/1993
  • Series: [vnr Computer Library]
  • Edition number: 1
  • Pages: 289
  • Product dimensions: 7.70 (w) x 9.58 (h) x 1.03 (d)

Table of Contents

Preface
1 Systems Migration: Introduction and Scope 1
The Scope of Migration 5
Why Migrate Applications and Systems? 6
Why NOT to Migrate Applications and Systems 9
Migration versus Conversion 10
Migration Patterns within Organizations 11
Exactly the Same? 12
How Difficult Is This Going to Be? 12
It's Finished ... or Is It? 15
2 Analyzing Your Current Environment 17
The Migration Model 17
Migration Factors 21
Need Level Factors 21
Function Level Factors 22
Structured Analysis 23
Nonfunctional Requirements 27
Design Level Factors 28
Implementation Level 36
Performing Application Analysis 41
3 Migration Planning 43
Technical Feasibility and Selection of a Target Environment 43
Risk Reduction Strategies 50
Developing a Transition Strategy 52
Developing a Migration Plan 54
Outside Assistance During the Migration Process 57
4 Sample Migration Plan 59
Sample Migration Plan 61
5 Database and Network Migration 101
Database Migration 101
Network Migration 117
6 Migration Tools 123
Why Use Tools? 123
Categories of Tools 124
Shortcomings of Tools 126
Tool Suite Example 126
7 Advanced Technologies as Migration Targets 135
Client/Server Computing 135
Distributed Databases 138
Networks and Communications 141
Electronic Mail 143
Object-Oriented Technology 144
Open Systems 146
Enterprise Computing 149
For Additional Information 152
8 Portability: For the Next Time 155
Portability: An Overview 155
Portability Guidelines 156
Use of Services and APIs 163
Some Other Guidelines 163
9 Comprehensive Migration Questionnaires and Checklists 165
Appendix: Sample Database Migration Plan 225
Glossary 271
Index 283
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