Re: [Fwd: multiple A records]

[Sanjeev Gupta <ghane@xxxxxxxxxxxxxxxxx>]

Short Answer: No

Long Answer: Not measurably.  Remember, people are not doing a DNS lookup
on your domain for the heck of it.  A DNS lookup typically fits in 1 UDP
packet.  Persumably, he is going to then connect to the web server, and
pull a few kB off it.  The DNS traffic disappear in the background noise
(you probably have just as much ARP traffic on your LAN, without you
knowing it).

Similarly, there is little CPU utilisation if you are serving a zone from
a static file.

Really.

On Wed, 6 Jun 2001, sanjay singh wrote:

> but, don't you think keeping TTL close to 0 will increase the network
> traffic on my DNS.
> 
> ~sanjay
> 
> Raju Mathur wrote:
> 
> > >>>>> "sanjay" == sanjay singh <linux@xxxxxxxxxxxxx> writes:
> >
> >     sanjay> Hi
> >
> >     sanjay> If we have multiple A records pointing to different IP (in
> >     sanjay> DNS) for a particular domain like
> >
> >     sanjay> www A 192.168.0.1 A 192.168.0.2 A 192.168.0.3
> >
> >     sanjay> it will work in round robin.. right. My question is
> >     sanjay> suppose one of the 3 machines is not working then how it
> >     sanjay> will replicate to next one?
> >
> > It won't.  You need some scripting which checks whether the machine is
> > up or not and puts it's IP in the DNS if it is.  Also set your TTL to
> > as close to 0 as possible, though it's possible that some bad
> > nameservers will cache the IP's anyway.
> >
> > Regards,
> >
> > -- Raju
> > --
> > Raju Mathur          raju@xxxxxxxxxxxxx           http://kandalaya.org/
> >
> > ------------------------------------------------
> > The mailing list archives are available at
> > http://lists.linux-india.org/cgi-bin/wilma/linux-delhi
> 

--
Sanjeev "ghane" Gupta                    Mob: +65 98551208
dotXtra Pte Ltd                          Fax: +65 5470260
Singapore                                email: ghane@xxxxxxxxxxx
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