if i run two names servers for my domain, should the 2nd one be a
duplicate /etc/namedb of the first? or should the 2nd one act as a
slave to the first? i've been doing it with 2 systems having the same
files in /etc/namedb. changes from the first also go to the 2nd
manually.

what is the recommended way of doing this?

__________________________________________________
Do You Yahoo!?
Get email at your own domain with Yahoo! Mail. 
http://personal.mail.yahoo.com/