One of the most interesting talks these weeks, and a rare insight into one of the most active pages on the web: Marco Cecconi of StackOverflow speaks about the general server architecture, why they don’t unit-test (!), how they release (5 times a day) and shows some awesome server load screenshots. It’s fascinating that they run one of the most trafficked pages (that also uses long-polling “real-time” messaging !) on just 25 servers, most of them on 10% load all the time. “We could run it on just 5 servers if needed”. Awesome. Nice statements regarding caching and using existing code, too. I really like the Get-Things-Done attitude and the simple, but productive view on workflow (use multiple monitors, don’t be the nerd sitting in front of a laptop). The code is not perfect (lots of static methods), they don’t even test, only have a hand full of developers (!) and nearly no downtime. Ah yes, and they run one of the most successful sites in the history of the internet. “Languages are just tools”. “You’ll be successful anyways, or fail anyways [it does not depend on the language].” I really like that guy. And by the way, they mainly …