RE: web server optimization question

[jari p. <jar...@ho...>]

Robert,

I  did some experimenting and can share the results so far:
=20
- with ligthttpd and minimal server tuning, I got around 3300 CAPS with 100=
0 virtual clients.
    (load-curl  0.41 re-compiled with optimization) compared to 1200 with A=
pache.
 =20
Then the good news:
 My client in this test was is dual-core P4 2.8Ghz, 1GB RAM, Fedora 5
 and with -t 2 option there was almost linear scaling leading about 6000 CA=
PS!
 Very impressive,  thanks  for  pointing  this  out.
  =20
  - I then switched to nginx, and  now got  8000 CAPS  with -t 2 and 1000 v=
irtual clients.
   (no change in client configuration )

But there was  also a change in server behavior, lighttpd does NOT use pers=
istent connections
and closes each TCP connection (TCP FIN server ->client ).
This is actually the kind of behavior, I wanted to see:
NO persistence, thus  creating load on DUT that needs to track TCP session =
creation and closing.
   =20
Nginx  with default settings has persistence,  (and not sure if there is di=
rective to make it not to do so),
so this seems to explain the higher CAPS number.

I also experimented a little with the number of virtual clients, but I got =
about the same results with 256 clients,
and performance started to degrade around 1500 clients.

- Finally, I tried configuration  where client closes the connection,=20
but with this  I got  much lower CAPS with both lighttpd and nginx.


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