[Samba] AD file server

[ray klassen]

OK i'm intrigued. I've been watching the various beta pages on the wiki for Samba 4 since it went beta and I still don't quite get something 

"Samba 4.0 beta ships with two distinct file servers.  We now use the 
file server from the Samba 3.x series 'smbd' for all file serving by
default. 
Samba 4.0 also ships with the 'NTVFS' file server.  This file 
server is what was used in all previous alpha releases of Samba 4.0, and is
tuned to match the requirements of an AD domain controller. "


Does this mean that if you want to use a samba 4.0 host as a domain controller you must use the NTVFS file server? And therefore if you have a Samba 3.x domain controller that is also functioning as a file server, it's advisable to migrate the domain controller functionality to another machine as part of the upgrade?

(Thanks for all the hard work)