By DaveLevy on Feb 28, 2006
Joost Pronk Van Hoogeveen, Solaris Virtualisation Product Manager presented. He had one rather excellent slide, showing Sun's technologies as a spectrum, from Dynamic System Domains, though a Hypervisor solution, to Containers and then the Resource Manager.
While this misses the aggregation dimension of virtualisation (and I know he understands this), placing these technologies as a spectrum and making the deployment decision accountable to the applications' non functional qualities is very powerfull. It allows better evaluation of technology choice and hopefully deprecates the "I'm only using one virtualisation technology" view and encourages people to use requirements driven design. It may also enable a richer solution design capability to solve the hetrogeneity question; data centre managers need to implement a "Real Time Infrastructure" delivering multiple APIs i.e. windows, J2EE, Oracle, Solaris & Linux etc. If performing architecture on the virtualisation question forces the explicit statement of an applications non-functional qualities, then a service will have been performed.
Joost kindly sent me this reference, which is a Sun Inner Circle article called "The Many Faces of Viurtualization", from which I have taken the picture. (I've put the link up; I think it'll be an interesting read).