Red Hat Enterprise Virtualization Manager (RHEV-M) Scalability and Maximums

What is the maximum number of physical hosts that can be managed by a single RHEV-M instance? 200 is what I have for max hosts per cluster. What is the scalability limit if I have multiple clusters?
What is the maximum number of virtual machines that can be managed by a single RHEV-M instance?
Are there any differences in the scalability limits in a Self Hosted Environment vs. a non-Self Hosted Environment?