DNS (round robin) loadbalance and redundancy

[tw]

Hi all,

Is it possible to use DNS/Bind for more than just round robin load
balance and let it detect if one over the servers is down?

Thanks,

Eddy

[David Botham]

bind-use...@isc.org wrote on 06/03/2004 03:19:16 PM:
> Hi all,
>
> Is it possible to use DNS/Bind for more than just round robin load

Round robin is not load balancing.

> balance and let it detect if one over the servers is down?

There neiter the DNS protocol(s) nor BIND have this functinality. I
recommend something like Netscaler or F5...

hth,

Dave...

>
> Thanks,
>
> Eddy
>
>

[Jean-Christophe Smith]

Check out http://www.tenereillo.com/GSLBPageOfShame.htm

and

http://www.isc.org/index.pl?/sw/bind/docs/bind-load-bal.php

It goes into detail about some of the issues with using DNS as a
mechanism for load balancing and fail-over. There are solutions both GNU
and expensive(F5 3DNS & Radware WSD, etc) for doing it, but they may not
work as you would imagine. Some are based off BIND

Jean-Christophe Smith
VitalStream

-----Original Message-----
From: bind-use...@isc.org [mailto:bind-use...@isc.org] On
Behalf Of tw
Sent: Thursday, June 03, 2004 12:19 PM
To: comp-protoc...@isc.org
Subject: DNS (round robin) loadbalance and redundancy

Hi all,

Is it possible to use DNS/Bind for more than just round robin load=20

balance and let it detect if one over the servers is down?

Thanks,

Eddy

[Barry Margolin]

In article <c9nv10$2t32$1...@sf1.isc.org>, tw <so...@not.here> wrote:

> Hi all,
>
> Is it possible to use DNS/Bind for more than just round robin load
> balance and let it detect if one over the servers is down?

BIND doesn't have anything like that built into it. You could use
separate server monitoring software that can be configured to run a
script when it notices a server failure, and that script could update
the DNS using nsupdate.

--
Barry Margolin, bar...@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***