There is no "silver bullet" in the cloud. No single product or packaged bundle can deliver all the virtualization you need to make the cloud real or all the control you need to make it effective. Heterogeneous, evolving and typically complex, the cloud requires a measured approach to its implementation and an integrated approach to its many components. A technology such as the hypervisor that creates compute virtualization is, in fact, only one of a cloud's many building blocks. When designing a cloud, organizations should consider the needs of the applications and workloads beyond compute virtualization such as networking and storage-and then evaluate the integration and control requirements across cloud and non-cloud business services.