[ILUG] Class C Addresses

[Colm Buckley]

On Wed 07 Nov 2001 17:14, Kate wrote:

> Imagine how simple load balancing would be, if you had ten
> webservers in a load balanced set, each with a unique ip, all round
> robin DNS'd to the same hostname.

That's not load-balancing, that's load distribution.  You have no
guarantee that the servers will receive even approximately-equal
loads, and no account can be taken of servers with differing capacity,
or of varying "busyness".  The BigIP load-balancer (for example; I've
not seen antefacto's in action) can take account of lots of factors in
deciding which server is "it" for a particular request, including a
user-specified weighting, SNMP results from the server, average
throughput, etc...

DNS round-robining is frequently very *unequal*, because you'll get
some big users hanging onto the same IP address, and loading one
server disproportionately.

Working for a company which produces a load-balancing *product*, I'm a
little surprised you're not familiar with this...

           Colm

-- 
Colm Buckley : Systems Architect @ NewWorld Commerce
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