How Tumblr went from wee to webscale

gigaom.com — Tumblr hits 500 million page views a day, deals with 40,000 requests per second and sends more than a terabyte of data into its Hadoop cluster. Here's how it went from nothing to a startup that needed to serve 15 billion page views a month. Feb 14, 2012 View in Crawl 4

How Tumblr went from wee to webscale