Re: [cobalt-users] two Raq with different DNS

["Rodolfo J. Paiz" <rpaiz@xxxxxxxxxxxxxx>]

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