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

A brief history of Azure

I was actually working at Microsoft at the time of Azure’s launch. Internally, the project code name was Project Red Dog, supposedly named after a bar in Silicon Valley. It was launched in October 2008 at the Professional Developers Conference (PDC) and had General Availability (GA) to the public in February 2010. It was initially solely based on Windows and was actually called the Windows Azure platform. I still have a sticker of the original logo. In 2014, the “Windows” part was dropped from the name since it later adopted the Linux operating system as well, and it was called Microsoft Azure. As a side note, over 50% of the VMs that run in Azure are Linux as of the publishing of this book.

If you were not working or tracking Azure when it came out, you might find it very interesting that when it was first released, it was only a PaaS offering with no provision for IaaS. It was conceptually ahead of its time. The primary assets you...