Google OS
Readings
Sanjay Ghemawat et al., "The Google File System" (2003)
Fay Chang et al., "Bigtable: A Distributed Storage System for Structured Data" (2006)
Mike Burrows, "The Chubby lock service for loosely-coupled distributed systems" (2006)
Open Source
Much of the infrastructure of Google is being replicated through the Hadoop project.