"Chris Shiflett" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> How do you define scalability? What factors do you consider when you
declare
> whether a particular technology is scalable? Do you think PHP is scalable?
Does
> Yahoo?

Well, from I think that your approach is interesting, especially with 3
graphs with kinds of scalability. Anyway, I am not sure one can draw such
graphs for just technologies like java or php. Maybe for some specific app
it can be done. Even then one should be quite causios not to compare apples
and oranges, and also to measure scalability in really important matters.

Also there is one trivial kind of scalability that is often found: when some
solution does not scale at all. You can put as much servers, processors,
ram, you are still stuck. Notorious and overused example is "delivering the
baby" problem. You can engage as many women as you wish, it still takes a 9
months. Since people have often been caught in the situation with
technologies where no adding of resources can make difference, they are
content that there is at least some possibility to scale, so that they say
"this technology can scale" to differentiate it from complete dead ends.

rush
p.s. I really enjoyed your book :)
--
http://www.templatetamer.com/

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