I have recently begun experimenting with the KVM virtualization infrastructure. After deployment, I used virt-manager running on a management computer to build my first guest. I notice that, by default, the resulting virtual machine is in the RAW format.
From what I understand, it is possible to create virtual disks of various formats. (http://www.linux-kvm.org/page/FAQ#What_virtual_disk_formats_can_KVM_use.3F).
My questions are: 1) What format is generally considered most portable? (i.e. moving to a new virtualization platform/hypervisor)
2) Is is possibly to specify format during virtual machine creation in virt-manager, if so, how?
3) Can anyone suggest a more feature rich management tool besides virt-manager?