Book Image

Modernizing Legacy Applications to Microsoft Azure

By : Steve Read, Larry Mead
Book Image

Modernizing Legacy Applications to Microsoft Azure

By: Steve Read, Larry Mead

Overview of this book

Organizations have varying circumstances, objectives, and prerequisites when contemplating a hyper-scale cloud solution transformation to a platform such as Azure. Modernizing Legacy Applications to Microsoft Azure uncovers potential scenarios and provides choices, methodologies, techniques, and prospective possibilities for transitioning from legacy applications to the Microsoft Azure environment. You’ll start by understanding the legacy systems and the main concerns regarding migration. Then, you’ll investigate why distributed architectures are compelling and the various components of the Azure platform needed during migration. After that, you’ll explore the approaches to modernizing legacy applications and the Rs of modernizing (i.e., rehost, refactor, rearchitect, and retire). You’ll also learn about integration approaches and potential pitfalls. By the end of this book, you’ll be well equipped to modernize your legacy workloads while being aware of pitfalls and best practices.
Table of Contents (18 chapters)
1
Part 1: Legacy Estate Options
3
Chapter 2: Strategies for Modernizing IBM and Unisys Mainframes
6
Part 2: Architecture Options
10
Part 3: Azure Deployment and Future Considerations

Redesigning for Azure – completely changing the application

There might also be compelling reasons to completely redesign the application to native Azure when moving off a legacy system. The following are a number of potential reasons:

  • The system does not provide the business functionality needed on the current legacy platform. In this case, it would not make sense to move the system as is to Azure.
  • The current legacy system has a lot of technical debt, meaning that even if the current functionality meets business requirements, your company does not have the trained staff to support or modify the system.
  • You want to take advantage of cloud-native features, such as Spark compute clusters, artificial intelligence, or on-demand scaling.

The key things you need to consider before undertaking a project that does a complete redesign include the following:

  • Understand the business functionality: what you want to keep, what you want to drop, and what you...