RE: [cobalt-users] DNS Naming resolution - Raq Newbie

["John Cordeiro" <jcordeiro@xxxxxxxx>]

THANK YOU JEFF!!!!!!!!!!!!!!!!!!!!!!!!

-----Original Message-----
From: cobalt-users-admin@xxxxxxxxxxxxxxx
[mailto:cobalt-users-admin@xxxxxxxxxxxxxxx]On Behalf Of Jeff Lasman
Sent: Thursday, May 04, 2000 1:35 AM
To: cobalt-users@xxxxxxxxxxxxxxx
Subject: Re: [cobalt-users] DNS Naming resolution - Raq Newbie


John Cordeiro wrote:

> One more question What is a sub delegate Domain and how can I name a
cluster
> of servers www. so they respond to the www request as opposed to machine
> name. It doesn't matter if the host name changes then. Right?

Easy to set up "round-robin" DNS.

Using Bind 4.9 and later, just set up multiple A records, for example
(this example from O'Reilly's DNS and Bind, page 259):

foo.bar.baz.   60 in a 192.1.1.1
foo.bar.baz.   60 in a 192.1.1.2
foo.bar.baz.   60 in a 192.1.1.3

They also recommend reducing the records' time-to-live (as shown in the
example, but in a way you can't do on the RaQ, and in fact you can't do
on any RaQ at all, using the gui, except for the RaQ3).

Note these words, from page 260:

"Note that this is really load sharing, not load balancing, since the
name server gives out the addresses in a completely deterministic way,
without regard to the actual load or capacity of the servers servicing
the requests."

This is NOT load balancing.  If you're interested in load balancing,
start by taking a few courses in how routers work.

> How do you have yours setup?

I don't do load sharing or load balancing.  Did something give you
impression I did?

> Imp trying to have multiple name like mail www and pop on the same raq for
> user ease. The ideal setup would be to have the raq respond to www for
http,
> ftp for ftp, mail for smtp and pop for pop3 mail also news for nntp. Any
> suggestions?

Easy.  Give each one an A record with the same IP#.

Jeff
--
Jeff Lasman <jblists@xxxxxxxxxxxxx>
nobaloney.net
P. O. Box 52672
Riverside, CA  92517
voice: (909) 787-8589  *  fax: (909) 782-0205

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