DNS cluster

Brad Knowles brad at stop.mail-abuse.org
Fri Jul 8 08:16:19 UTC 2005


At 9:02 AM +0100 2005-07-08, Stelios A. wrote:

>>   When somebody tries to access a domain, which of the dns will response
>>   first?
>
>>   Depends on which one the client queries first.
>
>  Fair enough but how do I know which dns they will query first?

	You don't.  Maybe they queried you in the past, and they have 
some memory of which machine they think is faster.  Maybe they will 
query the records in the order that they're handed out from the 
delegating parent zone.  Maybe the servers in the delegating parent 
zone do (or do not do) round-robin.

	There are too many variables.  It's impossible to tell which 
server they will query first.

>                                                                  Is this
>  something that has to do with the country of the DNS?

	Nope.

>  The ns1 will be in UK and the ns2 in Netherlands.

	Getting network diversity is good, as is geographic diversity. 
But that's probably not going to have a lot to do with load-balancing 
between the machines.

-- 
Brad Knowles, <brad at stop.mail-abuse.org>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
     Assembly to the Governor, November 11, 1755

   SAGE member since 1995.  See <http://www.sage.org/> for more info.



More information about the bind-users mailing list