question about dns query distribution

[Barry Margolin]

In article <mailman.1259.1360341660.11945.bind-users at lists.isc.org>,
 "Barry S. Finkel" <bsfinkel at att.net> wrote:

> > HI Lawrence,
> >
> > We have recursive / caching name server for our Broadband internet
> > services. And we have 60-40 traffic ratio. I mean 60 % queries comes
> > on primary and 40% on secondary.
> >
> > Why primary does not getting 100% ?
> >
> > Is there any way to do it ? or what is the reason behind it that both
> > servers' having queries ?
> >
> > BR
> > Ben
> 
> In DNS there is no concept of a "primary" and "secondary" name server.
> All of the name servers listed in the NS records for a zone are equal,
> and any can be used to handle a DNS query (assuming, of course, that
> each server has the zone properly configured).  BIND will use the server
> that has the shortest response time, but I do not know what other DNS
> implementations do.

His question is about a caching NS, not the authoritative servers listed 
in NS records. So the distribution is dependent on how client resolvers 
behave, not how other BIND servers operate.

-- 
Barry Margolin
Arlington, MA