On Fri, 26 Oct 2007, J. Shirley wrote:
Another piece of advice: Don't look at requests per second as the idea of
webserver scalability -- sure, you want to have efficient code, but that is
just efficient code measurement; not scalability. Look at it this way: How
many webservers do I need to add to my cluster to double traffic. If there
answer is more than two, start looking at bottlenecks. If it is two, and
you are still near peak usage, look at bottlenecks. If you add two, and
everything is running smooth then you are probably in good shape.
This doesn't make any sense if you look at the math.
If I currently handle 1M hits/day with 20 web servers, I hardly can expect
to handle traffic of 2M hits/day with 22 web servers, can I?
Did you mean "double" instead of "two"? That'd make more sense.
-dave
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