The Science and Information (SAI) Organization
The Infrastructure-as-a-Service (IaaS) cloud computing has emerged as a viable alternative to the acquisition and management of physical resources. With IaaS, users can lease storage and computation time from large datacenters. Leasing of computation time is accomplished by has complete control over the configuration of the VMs using on-demand deployments, IaaS leasing is equivalent to purchasing dedicated hardware but without the long-term commitment and cost. The on-demand nature of IaaS is critical to making such leases attractive, since it enables users to expand or shrink their resources according to their computational needs, by using external resources to complement their local resource base.