[FIXED] What does wikipedia use to scale?

Issue

Being the 5th most visited site in the world, and serving millions of pages to tens of millions of users daily, does wikipedia use anything else in the back-end to scale to those numbers?

Or is it just really good code?

Is it also true that they have just over a hundred (or a few) hundred servers?

Solution

This is a little outdated (2006): Wikipedia: cheap & explosive scaling with LAMP (PDF)

Answered By - miku