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

The different types of integration

What we mean by types of integration in this section is the types of systems that would possibly need to integrate with a newly transformed system from a legacy platform to Azure. These include the following:

  • Other legacy platforms in a customer’s estate, such as mainframes, UNIX, Linux, and Windows
  • Other systems running Azure
  • Systems running in other clouds
  • Integration with third-party enterprise systems such as Enterprise Resource Planning (ERP)

So far, we have looked at integration from the point of view of data and applications. Next, we will look at integration between Azure and on-premises systems.

Integration with the existing legacy estate

Let’s start with mainframes. Just like with any other platform, mainframes have data, applications, and utilities. Let’s look at the options for dealing with each of these.

Data

Mainframes have several types of data sources that can integrate with...