MSDN Magazine - April 2008 - (Page 64)

Richard Campbell and Kent Alstad Performance Scaling Strategies For ASP.NET Applications s ASP.NET performance advisors, we are typically brought into a project when it’s already in trouble. In many cases, the call doesn’t come until after the application has been put into production. What worked great for the developers isn’t working well for users. The complaint: the site is too slow. Manage ment wants to know why this wasn’t discovered in testing. Devel opment can’t reproduce the problem. At least one person is saying that ASP.NET can’t scale. Sound familiar? Some of the busiest Web sites in the world run on ASP.NET. My Space is a great example; in fact, it was migrated to ASP.NET after running on a number of different platforms. The fact is, perfor mance problems can creep into your app as it scales up, and when they do, you need to determine what the actual problem is and find the best strategies to address it. The biggest challenge you’ll face is creating a set of measurements that cover the performance of your application from end to end. Unless you’re looking at the whole problem, you won’t know where to focus your energy. minor modifications it can be used to measure Web application performance. The modified equation is shown in Figure 2 and each element is explained in Figure 3. Now that you have the formula, the challenge lies in measuring each element. The ending value, response time, is relatively easy to measure; there are a number of tools that will time exactly how long the entire process takes. Payload can be measured using various tools (websiteoptimization.com/ This article uses the following technologies: ASP.NET This article discusses: Scaling ASP.NET applications and databases Optimizing code ✥ Efficient caching ✥ Affinity and load balancing ✥ ✥ The Performance Equation In September 2006, Peter Sevcik and Rebecca Wetzel of NetFore cast published a paper called “Field Guide to Application Deliv ery Systems.” The paper focused on improving wide area network (WAN) application performance and included the equation in Figure 1. The equation looks at WAN performance, but with a few 64 msdnmagazine Kent Alstad is the CTO of Strangeloop Networks (strangeloopnetworks.com) and the principal or contributing author on all of Strangeloop’s pending patents. Before helping to create Strangeloop, he built and consulted on many high-performance, high-scaling ASP.NET applications. Richard Campbell is a Microsoft Regional Director, MVP in ASP.NET, and the co-host of .NET Rocks, the Internet Audio Talkshow for .NET Developers (dotnetrocks.com). He has spent years consulting with companies on the performance and scaling of ASP.NET and is also one of the co-founders of Strangeloop Networks. http://websiteoptimization.com/ http://strangeloopnetworks.com http://dotnetrocks.com

Table of Contents Feed for the Digital Edition of MSDN Magazine - April 2008

MSDN Magazine - April 2008 Contents Toolbox CLR Inside Out Basic Instincts Cutting Edge Foundations Test Run Service Station Windows with C++ Going Places { End Bracket }

MSDN Magazine - April 2008

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