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


AIX was released by IBM in 1986 and stands for Advanced Interactive eXecutive. It was their proprietary offering of UNIX that was based on the UNIX System V. Over the years, they ported it to a variety of platforms including the early RISC-based RS/6000, their System 370 Mainframes, PS-2 Personal Computers (remember them?), and more recently, the platform you will more than likely find it on, the Power Platform, which is also what the IBM i Series (AS/400) runs on. This often creates confusion when considering your approach to migration because there are two distinct operating systems that IBM offers on the same hardware platform, and the considerations for migrating the applications that run on them are very different. Let’s take a deeper look at AIX and the special considerations it requires for migration to the distributed x86 platform.

AIX overview

If you are familiar with UNIX (or Linux), especially BSD UNIX, AIX will seem very familiar. Except for a few considerations...