Intergraph has published white paper about cloud computing http://www.intergraph.com/sgi/downloads.aspx?assetid=173
This picture shows a vision of VMWare – “Computing Clouds on and off premise” exactly the flexibility to host applications anywhere. Whether some sensitive data should remain on premise or can be eventually loaded off premise should be up to decision of the enterprise not technology restrictions (or lock-down by cloud infrastructure). Enterprise can always decide whether their ‘treasure’ will be stored. I have added my small notes into grey boxes in the graph refering to available type of products.Core part of this vision is enabling technology- VMWare VMotion that enables the live migration of running virtual machines from one physical server to another with zero downtime, continuous service availability, and complete transaction integrity.Other technology involev are : VMWare Fault Tolerance: no downtime in case of hardware failure (VM continuously sync, with another VM on another HW)
and AppSpeed (for self-managing Datacenter) – automatically assigning new resources when performance goes bellow SLA. vCenter provision more instances.