Key points are not available for this paper at this time.
Cloud computing promises great efficiencies by multiplexing resources among disparate customers. For example, Amazon's Elastic Compute Cloud (EC2), Microsoft Azure, Google's Compute Engine, and Rack-space Hosting all offer Infrastructure as a Service (IaaS) solutions that pack multiple customer virtual machines (VMs) onto the same physical server.
Varadarajan et al. (Mon,) studied this question.