question about multiple CNAMEs?

[Ralf Weber]

Moin!

On 26.06.2007, at 03:02, Edward Lewis wrote:
> There was a time in the history of DNS that got a little permissive
> in the way the protocol was implemented.  At the time it was cool to
> see DNS as a low cost load balancer and let a CNAME redirect a query
> to one of many alternate names.  The DNS isn't good at a lot of
> things, including load balancing, it's only good for a strict lookup.
> Lookup a name, a CNAME might redirect you to one other name (and so
> on for a bit), and you get the one answer.  Load balancing is a much
> harder job than round robin answers.
While I agree that CNAMEs are evil ;-), or just links as you explained
correctly, DNS can be and is used for load balancing (of course not
with CNAMES). AFAIK a lot of load balancing solution that cover more
than one physical location use DNS as a mechanism to divert load to
different locations. You can also use DNS as a cheap load balancer
if you have stuff in different locations, but to just handle a bunch
of boxes in one location there are better solutions than DNS.

So long
-Ralf
---
Ralf Weber
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