Researchers from Microsoft and the University of California at San Diego (UCSD) have come up with divergent ways to address shortcomings of data center architectures, particularly management and configuration burdens, and to promote the efficient use of virtual machines. The two groups presented their findings at the SIGCOMM 2009 conference, and each had its own flavor. The Microsoft team sought high performance for all traffic regardless of demand, while the UCSD team focused on allowing the free migration of VMs, minimal configuration when adding new hosts to the network and quickly addressing failures. Microsoft's researchers also addressed VM migration and Layer 2-like addressing but using a method that calls for installing an agent on every endpoint, which contrasts with the UCSD group's plan to tweak switch software and leave the endpoints alone.
More info: Computer World