Picture if you will, a collaborative site that runs on two servers, is managed by four people, and has attracted a third of its target demographic within six months of launch. A site that has had 800,000 posts submitted by its users in its short lifetime and has 16 million pageviews/month - and growing.
And take a look at the 8th building block:
Performance: Ensuring answers are provided super fast was imperative. As a result, Stack Overflow is built on a Microsoft stack. "This entire site is serving 16 million pages a month and we're doing it off of two servers which are almost completely unloaded," said Spolsky. One server is a Web server, the other is running Microsoft SQL Server 2008 and both are 8 core Xeon's. While many may assume using an open source stack would be more efficient, Spolsky explained that while SQL Server licenses cost $5000 per box, the Microsoft stack is paying for itself in terms of reduced hardware.
Thanks to Spolsky and Atwood for given us this incredible network. Thanks for Cab_ux for bringing this link to my attention.