Working with Legacy Systems: A practical guide to looking after and maintaining the systems we inherit (English Edition)

Understand the crux of legacy systems—their architecture, analysis, and security constraints

Key Features

Understand what legacy systems are and strategies for their maintenance

Explore basic and advanced architectures of legacy systems

Discover how to analyze and secure legacy systems

Book Description

The IT industry is constantly evolving with the introduction of new technologies. While it is important to keep up with advancements, maintaining legacy systems is equally necessary to ensure that the infrastructure of your organization functions to the best of its ability. Sound knowledge of techniques that can be used for maintaining legacy systems can help you avoid common pitfalls.

The book begins with a quick overview of what a real legacy system looks like, how it works, and common issues that may be faced when trying to maintaining it. You'll then explore the architecture of a legacy system in detail and understand each of its components. As you progress, you'll discover a variety of techniques for analyzing a legacy system and how to apply them. Once you get to grips with the security constraints associated with legacy systems, you'll explore ways to secure them. Finally, you'll be able to easily make changes in legacy systems to enhance their performance.

By the end of this book, you'll have developed the skills and confidence to work with legacy systems and efficiently maintain them.

What you will learn

Perform static and dynamic analyses of legacy systems

Implement best practices to secure your legacy systems

Use techniques such as data cleansing and process cleansing to stabilize your system

Apply structural changes in your legacy system to make it highly available

Identify and resolve common issues with legacy systems

Understand a variety of tests that can help you secure and maintain legacy systems

Who this book is for

If you're new to working with legacy systems and want to understand how they work and how to maintain them, this book is for you. Table of Contents

Definition, Issues, and Strategy

Investigation and System Review

Making Changes

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