[Users] Migrate KVM to Ovirt

Hello Guys, I have a infrastructure of 2 Ubuntu servers that hosts kvm guest. I want to implement Ovirt, I'm wondering what is the best way to migrate the existing KVM Guest from my Ubuntu server to Ovirt. Can i rsync the .img and the xml to Ovirt ? virt-v2v ? I want a mention that I have a VM of 800GB would it be to large for Ovirt or to convert ? Regards,