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On Mon, 18 May 1998, Doug Elznic wrote:
> No. Mr. Shaw's explanation was a little over simplified. There is one
> master computer and many slave computers that do lots of numbercrunching
> in parralell. I can't imagine why you would need a web server with quasi
> supercomputer performance. Anyway what are you going to do if the master
> computer fails?
> BTW
> There are ways in order to gain redundancy for what you are trying to do.
> One simple way would be to use roundrobin dns.
Not to nit-pick (Ok I admit it I am) roundrobin DNS provides no level of
redundancy. Say you have 2 IP's in your RR DNS. That means that if one
system goes down, 50% of the requests fail. Maybe that's good enough for
some, but not me thank you very much. :-) What you need is something with
intelligence. Currently there's a number of options:
Cisco Local Director
RND Networks WSD
Big/IP
Resonate Dispatch
and others that slip my mind. Each has their advantages/disadvantages of
course. But they all do basically the same thing-
- - Load Balance across servers/server farms
- - Provide server failover (takes servers "out of the mix" if/when they go
down)
- -----
Aaron Turner | Either which way, one half dozen or another.
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