This session explores some of the issues architects face when designing cloud applications for real world, line of business situations. Drawing on experiences moving MYOB’s flagship AccountRight application to Azure, we’ll drill into some specific issues encountered, including: how best practices can sometimes constrain your options, how performance issues manifest themselves in complex multi-layered cloud applications and what you should do about it, and various gotchas for teams new to the cloud. We’ll also spend some time on suggested approaches for scalability testing, and how you can constrain costs during the development lifecycle. Finally, we’ll finish with a discussion of what we’d do differently next time! MYOB is one of Australia’s largest ISVs, supporting over 1 million businesses in Australia and New Zealand. Doug Bower is the performance and UI architect for the Huxley Project, converting our .Net 4.0 desktop application to be cloud enabled. Doug has over 15 years experience in the software development industry. Bradley Smith is the performance lead developer for the Huxley Project, and has over 5 years of .NET experience, writing and tuning applications in client-server scenarios including ASP.NET and Azure.