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


There are existing patterns for converting UNIX variants to Azure. The main decision you will need to make is what type of target architecture you want on Azure. This will often be determined by how you want to maintain the application moving forward. If you want to keep this pretty much the same in the Azure version, then an emulation option (if available) or recompilation to VMs might be the right way to go. If you want to have a more cloud-native solution, then using PaaS services should be investigated as an option. Finally, if you are moving an ISV application from UNIX to Azure, you need to move forward with the vendor-recommended solution.

We’ve looked at moving from various types of legacy environments in the first four chapters, including this one on UNIX. We will now look at Azure services that enterprise applications can use in the next two chapters.