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

Robert Annett

qer 2019 · Packt Publishing Ltd

Rreth këtij libri elektronik

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

Rreth autorit

Robert Annett has been a developer since 1995 and worked in industries from energy management to investment banking. Much of this work has involved upgrading and migrating legacy systems with the occasional green-field project (with integration to legacy systems, of course). He has worked in the IT industry long enough to realize that ALL successful systems become legacy eventually.