Re: Best Programming language for Network programming (complex server application)

toby schrieb:

Ok, one more try...

Why would we "make a new benchmark", are you under the impression that
there is a general lack of HTTP benchmarks? The canonical monster one is:

http://www.spec.org/web2005/

Well, that goes as far as 25,000 users. Is there a benchmarked system
besides yaws that painlessly goes to 90,000 and beyond?

Oh sut up. Even the benchmark page states this simulates a DDOS attack, not active users. Even estimating that every user on a web server will only use 1KB/s (average) this would mean 90MB/s. Even in case of a GB connection (in which case there would probably be server redundance,e.g. round robin) this "benchmark" could only prove a bug or security flaw in Apache. Post it to Apache or mitre as you wish.
On the other hand your benchmark actually details a far more serious flaw in Jaws itself.
Why, tell me why, does Apache start out at 400KB/s on NFS while Apache/local and Jaws/NFS do 800KB/s?
Oh, i got the answer.
800KB/s (given the stated 20KB packet size) require 40 packets/s, or, in other words, 25 ms mean time. Given the fact that i assume tcp handshake has been done (and HTTP/1.1 keep-alive is being used) i estimate only two packets are necesarry, so a "ping Time" or network latency of 12.5 ms can be expected.
Now, if a web server checks (as it should) the mtime of a file over nfs the same latency can be assumed (2 packets as well).
So, without knowing erlang or jaws, it guess its reasonable to assume that jaws doesnt check for modifications of the files served.
Need to send it a HUP or restart it when you change a file in the server directory, great, thanks, i think i´ll skip that one.
.

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