To gain agility and competitive advantage, modernization is a business imperative that no company can afford to ignore. This includes modernizing your applications, infrastructure, technology, and even your approach to software development.
From an infrastructure perspective, modernizing from an on-premises or legacy environment to Amazon Web Services (AWS) helps you begin to harness the agility, flexibility, and scalability of the cloud. Modern software development methodologies such as DevOps go hand-in-hand with modern cloud environments, making it possible to take advantage of cloud technologies and tools to further accelerate software development and optimize the elasticity, resiliency, and performance of software running in the cloud.
However, legacy applications must be modernized as well, or they will hinder your ability to use the cloud to achieve transformative outcomes for IT and the business. Of the six approaches to application modernization (retire, repurchase, retain, rehost, replatform, and refactor), rehosting is the most common first step. That’s because rehosting offers a relatively low-risk way to begin modernizing and reaping early benefits such as lower costs, improved performance, and the ease of operation on a modern platform.
If the thought of rehosting applications seems daunting, that’s understandable. While the risks involved in rehosting are relatively low depending on the criticality of the application, there are nonetheless risks that you should work to minimize. Mitigating those risks requires proper planning, observability, data-driven decision making, and the adoption of best practices such as those in the AWS Well-Architected Framework, which was developed to help companies build secure, high-performing, resilient, and efficient infrastructure for their applications.
This white paper introduces the “why” and “how” of rehosting applications on AWS and sheds light on how to apply the five pillars of the AWS Well-Architected Framework so your rehosting effort optimizes your benefits.