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

Azure Regions

At the time of writing this, there are 60+ Azure Regions with 160+ datacenters located in 140 countries. If there is not yet an Azure Region in your country or locale, you might want to inquire with Microsoft, as there could be one coming soon. This makes Microsoft Azure one of the largest public cloud providers. Along with this, there are also Azure Sovereign Clouds, which adhere to specific laws and guidelines for specific countries.

The following screenshot shows the current deployments of Azure Regions across the world as of the publishing of this book:

Figure 5.2 – Azure Regions’ global footprint circa 2021

Figure 5.2 – Azure Regions’ global footprint circa 2021

So, you might ask: What exactly is the difference between an Azure Region and an Azure datacenter? It might be good to define some terms to provide some clarity on this topic, so let’s do that now:

  • Azure Region: An Azure Region is really just a collection of Azure datacenters that are located in a specific...