"Google Fellow Urs Hölzle describes the software and hardware infrastructure that makes searching a multi-terabyte web index for every query with an average response time of less than a quarter of a second, with near-100% uptime, possible, as well as provide an overview of the main problems facing a web search, software architecture, servers and compact rack hardware designs." - UWTV (Series Title: CSE Colloquia - 2002, The Google Linux Cluster)
My impromptu thoughts, opinions, etc ...