Robert Kaye - OSCON Day 0: Scalable Internet Architectures:

"One of my favorite presentations from last year was Theo Schlossnagel's presentation on Whack-a-mole, so when I saw him giving a full tutorial on scalability this year, I had to go and check it out. And this year I wasn't disappointed either -- Theo presented a solid tutorial that exuded his practical experience in this field. Of course its impossible to summarize four hours of a tutorial in a blog entry, so I'll try to summarize Theo's three simple rules that he applied repeatedly in his presentation:

1. Know the system you're trying to scale. 2. Complexity has costs. 3. Use the right tool for the job."