[Samba] samba4 AD + Bind9 HA

[Marcos Ariel Negrini]

Hello:
I am setting up a lab are samba4 AD + bind9. For now it works without 
problems. My idea is to join other Samba4 and I have doubts about Bind, 
I understand that each AD Samba4 that joins the domain will have its own 
bind_dlz. My question is, each bind will be independent and will take 
the information from its local Ad through dlz (and the dns 
synchronization will be in charge of samba)? or should I have a bind 
master and the others slave? as far as I understand the first option is 
the correct one, but please correct me if I'm wrong?
Regards

Marcos Negrini