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)
Part 1: Legacy Estate Options
Chapter 2: Strategies for Modernizing IBM and Unisys Mainframes
Part 2: Architecture Options
Part 3: Azure Deployment and Future Considerations

Azure Functions

Azure Functions allows you to deploy code that executes when certain events happen. That might sound kind of lame and generic, but when you consider that we live in an Internet of Things (IoT) world now, it might make more sense. The ability to respond to and process events as they happen leads to a more real-time IT world where the need for batch processes does not necessarily go away but is greatly diminished. Azure Functions is a deployment option that can be leveraged for this paradigm shift. Think of Azure Functions as compute on-demand.

This is somewhat of a specific and boutique workload in that it can only be used for certain workloads and usually in a re-architecturing and reengineering effort, but nonetheless is a viable deployment option when you are modernizing mainframe workloads.


Now that you have an idea of what Azure Functions is, let’s look at the benefits and things you will need to consider if you choose to select it for your...