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

Migrating HP-UX

This section may seem to somewhat repeat what was discussed in the previous section on Solaris. That’s because both HP-UX and Solaris were developed as a variant of System V UNIX. HP-UX, however, was developed by Hewlett-Packard (HP). As with Solaris, the first versions of HP-UX were powered by RISC cups. This was known as the PA-RISC version. Later versions of HP-UX were powered by Intel Itanium CPUs.

HP-UX had many implementations in the mid-to-late 1990s, which are still in use today. The HP-UX is now developed by Hewlett-Packard Enterprise (HPE).

HP-UX was widely used for the following:

  • Web servers
  • Relational database
  • Enterprise application

HP-UX was considered one of the most performant and highly available variants of UNIX and was deployed in commercial independent software vendor (ISV) offerings.

PA-RISC versus Itanium

PA-RISC was discontinued. But there are still customers that use this version. The Itanium version is...