In between avoiding any real specifics in an interview with GiggaOm’s Stacey Higginbotham Zuckerberg eludes to Facebook running on “tens of thousands” and approaching “hundreds of thousands” of hosts. According to comscore facebook supports up to 65 Billion, yes that is billion with a B, page views a month, or more then 2 Billion a day. Relatively speaking that is a huge number of hosts to support the site. He does talk about how they use memcached extensively but it sounds to me like some general re-architecture is in order. Or is this a VMWARE salesman’s dream?