We thank Tom Adelmeyer, Andrew Anderson, Mark Brown, Clement Cole, Aaron Holzer, Ken Rule, and Jeff Smits for their technical contribution and review comments. Thanks to the paper's advisory sponsors: Naresh Sehgal, Paul Barr, Rich Uhlig, and Fernando Martins. A special thanks to the performance engineering team including Nan Bo, Vivi Huang, Steven Thomsen, Steve Yang, Mark Brown, Aamir Yunus, Ashok Emani, Anthony P. Bertapelli, and Priyalal Kulasinghe for evaluating many consolidation and virtualization test methodologies.