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You could even upload those VMs to a public cloud and run the virtual machines (with your business-critical apps) at a service provider with no changes to the guest OS, applications or data.
The ability to run virtualized VMs in a public cloud has been packaged and named disaster recovery as a service (DRaaS). With services like those available from Hosting.com and Doyenz.com, VMs from vSphere are replicated to the cloud on an ongoing basis; if there’s a disaster, the standby VMs can be powered on to restore business-critical applications to service. End users can access those VMs via the Web, a VPN or they can connect to another company site via a site-to-site VPN.
This was first published in October 2012