It depends, of course. You've given us almost
no idea of the scale of your operation. You could
be looking for a nice midrange desktop-grade system
with extra RAM, no monitor, a cheaper video card,
an extra disk drive, and an external UPS, or you could
be looking for a roomful of PowerEdge racks, and
we can't tell the difference from what you've said.
You've also given us very little idea about the
type of server you need. For serving static web content,
you would mostly be concerned about disk space and
bandwidth; CPU would be an almost total non-issue.
OTOH, if these web servers need to run server-side
dynamic stuff, which most do these days, then there
are additional considerations. Since you asked on
Perlmonks, I assume you'll be wanting to do a lot
of Perl stuff on them, so that makes CPU somewhat
relevant, and RAM becomes very important. RAM is
even *more* important if there's a relational
database involved (though it may be preferable,
depending on your circumstances, to put the database
on its own dedicated server and let the web server(s)
talk to it over the network).
As far as price/performance ratio: once you get
past a certain point, the ecconomies of scale are
such that the cheapest way to get 2y performance
is to use 2z servers, rather than one server with
2x performance. Of course, that requires some
kind of load-balancing or round-robin DNS or
something, which for a small network is more
overhead than you want to mess with.
In summary, it depends very much on the details of
your setup. If you need someone to hold your hand
and walk you through evaluating that and making
a decision, you may need to get a local consultant.
You'll want someone who can go on-site with you and
sit down and look at your situation on paper, as
well as your facilities and infrastructure. But
of course, that costs money, and it's probably
cheaper to buy twice the hardware than you need,
to be sure you've got enough, rather than hire a
consultant to figure out exactly how much you need.
But again, it depends on your situation, and the
scale of your operation.
"In adjectives, with the addition of inflectional endings, a changeable long vowel (Qamets or Tsere) in an open, propretonic syllable will reduce to Vocal Shewa. This type of change occurs when the open, pretonic syllable of the masculine singular adjective becomes propretonic with the addition of inflectional endings."
— Pratico & Van Pelt, BBHG, p68
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