Book Image

Amazon Web Services: Migrating your .NET Enterprise Application

By : Rob Linton
Book Image

Amazon Web Services: Migrating your .NET Enterprise Application

By: Rob Linton

Overview of this book

Amazon Web Services is an Infrastructure as a Service (IaaS) platform in the Cloud, which businesses can take advantage of as their needs demand. The Amazon Cloud provides the enterprise with the flexibility to choose whichever solution is required to solve specific problems, ultimately reducing costs by only paying for what you use. While enterprises understand moving their applications among infrastructure they own and manage, the differences in Amazon's infrastructure bring up specific business, legal, technical, and regulatory issues to get to grips with. This step-by-step guide to moving your Enterprise .NET application to Amazon covers not only the concept, technical design, and strategy, but also enlightens readers about the business strategy and in-depth implementation details involved in moving an application to Amazon. You'll discover how to map your requirements against the Amazon Cloud, as well as secure and enhance your application with AWS. This book helps readers achieve their goal of migrating a .NET Enterprise Application to the AWS cloud. It guides you through the process one step at a time with a sample enterprise application migration. After comparing the existing application with the newly migrated version, it then moves on to explain how to make the hosted application better. It covers how to leverage some of the scalability and redundancy built into the Cloud, and along the way you'll learn about all of the major AWS products like EC2, S3, and EBS.
Table of Contents (19 chapters)
Amazon Web Services: Migrating your .NET Enterprise Application
About the Author
About the Reviewers


Autoscaling is a feature of AWS that allows extra EC2 instances to be added to your infrastructure automatically during periods of high load, and then allows the same instances to be decommissioned automatically when the load has passed. While this seems great in principle, in practice, this is harder to achieve than the hype suggests.

One of the biggest hurdles to overcome that enable Autoscaling to be practical is that most enterprise applications are not built around the principles of scaling horizontally. Let's take a look at our sample enterprise application Waaah:

As seen in the previous diagram, while both the web servers and the application servers can scale horizontally, the database servers are limited to one instance. Using Microsoft SQL Server, we can provide redundancy and failover as in the case of the architecture previously mentioned, but we cannot add extra SQL Server instances and expect the load to be evenly balanced between them.

For example, if the load on...