[ovirt-users] Few questions for seasoned oVirt experts

Hello Everyone, I'm new to oVirt so I was hoping I could pick the brains of those that may have been around the product longer than myself. To start, I am leveraging oVirt 4.2, so all questions will be centered around them. 1. I am looking to utilize the ovirt engine for managing potentially thousands of datacenters, has anyone experienced large scale deployments or many-multi datacenter installations all managed under the same engine? FWIW: There will only be 1-2 servers per datacenter, with one cluster and 5-10 vNic assignments per cluster. 2. Has anyone dealt with the auto registration/approval process with oVirt engine? I'm finding various documentation from different generations of oVirt, but haven't felt comfortable with what i've found since my instance doesn't seem to have features that i'm reading about. My goal is to ship servers to a site with a basic image and when it boots up it reaches out to our ovirt engine, in turn I can automate a validation of pending approval requests based on host criteria, i'm just struggling to figure out if the automatic registration is even a thing in the latest version. thank you in advance, I appreciate any feedback on the matter. -Brad