How to Scale a Single Server in the Cloud

One of the things you talk about near the end of your book is how you start with a single server. You have the data base, the application, the web server, everything on the same machine. And i wonder if you could talk a little bit about how far you take that one servein and why people should consider starting with that approach. It depends a lot on your application. For instance, i vear applications that are quite simple in nature. I don't see the point of having more servers. To me, it means more work. If i can do it with one id, do it withone.