From: "Rodolfo J. Paiz" <rpaiz@xxxxxxxxxxxxxx>
Reply-To: cobalt-users@xxxxxxxxxxxxxxx
To: cobalt-users@xxxxxxxxxxxxxxx
Subject: Re: [cobalt-users] two Raq with different DNS
Date: Thu, 21 Jun 2001 11:05:27 -0500
At 6/13/01 10:36 AM +0100, you wrote:
Hi,
I have two Raq's at different data centres and was wondering if I can add
some redundancy into a few of the sites hosted if I change
the dns of the domain to
ns.box.one
ns2.box.two
You *should* do primary DNS on one box and secondary on the other. This is
the right way, as it ensures that the name is still found even is the site
is down. Getting "page temporarily not available" from a browser (dns up,
web down) is infinitely better than "host does not exist" (dns down, who
cares what else is up).
would this mean that if the first box went down that the second box would
stats to serve the web pages or is there another method ?
Not at all. DNS is one service. Mail is another. Web is another. FTP is
another. They are all independently configured and set up. All, however,
rely on DNS to work properly.
Web services will not gain redundancy if you do DNS on the separate boxes.
Search for:
* redundancy
* fault-tolerance
* failover
* clustering
or am I trying to do something which is imposable ??
Not impossible. But nowhere near as easy as you thought at first. :)
--
Rodolfo J. Paiz
rpaiz@xxxxxxxxxxxxxx
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