Busy caches on Linux ???

We currently run a single site cache on a DEC Alpha box, handling just
over 500K TCP requests a day. I'm now considering upgrading it to a
multi-cache setup in the interests of fault-tolerance, and wondered
whether Intel hardware running Linux would be up to the job ? Although
I plan to replace one cache with two, I feel I should plan for at least a
doubling of the number of connections, so I'd want each of the Linux
caches to be capable of handling 500K requests a day. If you are already
running a Linux squid cache of similar (or larger!) size to this, I'd be
very grateful for any information on what sort of hardware you are using

Thanks in advance,
Andrew

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