One big cluster: How CloudFlare launched 10 data centers in 30 days

from http://arstechnica.com:

>> As a result, the company's "data centers" are usually at most a few racks of hardware, installed at co-location facilities that are major network exchange points. Prince said that most of his company's data centers are set up at Equinix IBX co-location facilities in the US, including CloudFlare's primary facility in San Jose—a facility also used by Google and other major cloud players as an on-ramp to the Internet.