Is it ok to run applications / processes in the root OS?
You should avoid running any Role / Feature or custom service in the root. If you have services you want to run put them in a guest VM. Running roles in the root can have a negative impact on the guest VM’s. This is due to how the Hypervisor scheduler handles the root virtual processors. Note: Outside pure performance deploying applications in the root has licensing implications as in a virtualized environment the so called virtual use rights only allow to run virtualization itself (and its associated management like management agents etc) in the physical environment.
