FTP Bencharoos,

I don't know if everybody has already seen this or not, but the
following article on benchmarking various OS's is somewhat interesting
in the good description of the various server software architectures:

http://www.sysadminmag.com/articles/2001/0107/0107a/0107a.htm

I thought the following graphic was particularly telling:

http://www.sysadminmag.com/articles/2001/0107/0107a/0107a_f3.htm

It claims the asynchonous model can handle about 35% more load than the
multithreaded model. Note that "asynchronous" in this context means
"select/poll", not POSIX asynchronous IO - which we would expect to be
more effecient under extremely heavy load (more than 1000 simultaneous
connections).

Shane