"In [this] series of articles we are going to talk about
mod_perl performance issues. We will try to look at as many aspects
of the mod_perl driven service as possible. Hardware, software,
Perl coding and finally the mod_perl specific aspects...."
"If you are building a fan site and you want to amaze your
friends with a mod_perl guest book, any old 486 machine could do
it. If you are in a serious business, it is very important to build
a scalable server. If your service is successful and becomes
popular, the traffic could double every few days, and you should be
ready to add more resources to keep up with the demand. While we
can define the webserver scalability more precisely, the important
thing is to make sure that you can add more power to your
webserver(s) without investing much additional money in software
development (you will need a little software effort to connect your
servers, if you add more of them). This means that you should
choose hardware and OSs that can talk to other machines and become
a part of a cluster."
"On the other hand if you prepare for a lot of traffic and buy a
monster to do the work for you, what happens if your service
doesn't prove to be as successful as you thought it would be? Then
you've spent too much money, and meanwhile faster processors and
other hardware components have been released, so you lose."
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