A good user experience depends on predictable performance within the data-center network.
DENNIS ABTS, BOB FELDERMAN, GOOGLE
The magic of the cloud is that it is always on and always available from anywhere. Users have come to expect that services are there when they need them. A data center (or warehouse-scale computer) is the nexus from which all the services flow. It is often housed in a nondescript warehouse-sized building bearing no indication of what lies inside. Amidst the whirring fans and refrigerator-sized computer racks is a tapestry of electrical cables and fiber optics weaving everything together—the data-center network. This article provides a “guided tour” through the principles and central ideas surrounding the network at the heart of a data center — the modern-day loom that weaves the digital fabric of the Internet.
Enterprise Grid Computing - Paul Strong - http://queue.acm.org/detail.cfm?id=1080877
Cooling the Data Center - Andy Woods - http://queue.acm.org/detail.cfm?id=1737963
Improving Performance on the Internet - Tom Leighton - http://queue.acm.org/detail.cfm?id=1466449