Am Sonntag 06 April 2008 20:51:05 schrieb Hannes Dorbath: > That sounds great, however I'm currently bound to Lighttpd. > > I've setup a clean test case to benchmark the issues I'm seeing. With > -e 600 -a 600 it seems I'm no longer bound to stat(), but to open() > now. > > Following is a trace of a "Hello World" PHP script (FCGI) as well as > my current configuration. > > I think I messed something with iothreads. Without GlusterFS total > throughput increases a lot with multiple HTTP clients, with GlusterFS > it decreases. I could not find any load where using iothreads > improved my situation, so there still seems to be a single point of > serialisation. > > If you have any suggestion on how to improve this configuration, I'd > really appreciative it. Hannes, if you have the time, you might wanna check the list archive for some posting of mine, which unfortunately doesn't give you a solution, but may convince you that you're not alone :-) In my experiments, I couldn't get much more than 900 requests/second pulled from my cluster (being small image files, 5-50 KB in size). but what might be of interest for your setup: I had much worse results when testing with lighttpd or nginx (only about 350 req/sec). however, with apache-1.3 or apache-2.2, I could oberserve a huge boost when enabling the io-cache, but no effect at all for lighttpd and nginx. and, as you describe, I never could measure any differences when playing with the other translators or start options. may be you could do your strace for an apache setup also? I guess this could shed some light on the reasons that apache works so much better (but still way to slow :-() than the modern competetion... Cheers, Sascha
