Since there is no fundamental distinction between both models, it makes sense to allow ""hybrid"" models which contain both grid and cloud components.

This milestone will be used to umbrella all steps towards that goal; including, but not limited to:

• Homogenization/Abstraction of grid and cloud machines and components
• Generalization of simulation motor and policies to allow both grid and cloud components in the same simulations

Some questions that still need to be answered about this unification:

• How will masters choose between virtual machines and physical resources for the execution of tasks?
• Will some machines be forbidden from being selected as a VM host?