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=
=20
     and with -t 2 option there was almost linear scaling leading about 600=
0 CAPS!
      Very impressive,  thanks  for  pointing  this  out.
   =20
     - I then switched to nginx, and  was able to reach  8000 CAPS  with -t=
 2 and 1000 virtual clients.
   (no change in client configuration )

  But there is 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 sess=
ion creation and closing.
    =20
   Nginx  with default settings has persistence,
    (and not sure if there is directive 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,=20
   but I got about the same results with 256 clients,
    and performance started to degrade around 1500 clients.
   =20
       - Finally, I tried configuration  where client closing the connectio=
n, but with this=20
     I got  much lower CAPS with both lighttpd and nginx.

-jari=20




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