Date Added: Jul 2009
Cloud computing seems to have as many definitions as there are clouds in the sky, however its impact on today's data centers is undeniable. Public clouds allow fast moving companies to outsource compute and storage on a pay-as-you-go basis, but it is private clouds that one would like to discuss in this paper. Simply stated, private clouds describe an architecture in which the servers and networks in the data center can rapidly respond to changing demands, by quickly scaling compute capacity and connecting that server capacity where it is needed. The technology underlying this fluidity is server virtualization, which by now has been established as a reliable and essential core technology for most data centers.