[ovirt-users] Shared vs Local Storage for Datacenters

Hi Guys, I'm wondering at the moment what the actual difference is between Shared and Local Storage Datacenters. As far as I can see a Local DC supports NFS as well which makes it a more flexible DC in storage if you ask me, so why do both still exist ? Is it possible in a decent way to change a running Shared Storage DC to a Local one and Keep the NFS shares and add some local mounts for specific hosts ? I hope someone can clearify! Cheers, Matt