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List:       linux-virtual-server
Subject:    Re: http reqs. to 4 real servers does not scale
From:       "Stephan Hendl" <Stephan.Hendl () lds ! brandenburg ! de>
Date:       2007-02-26 15:10:11
Message-ID: 45E30662.4F9C.0016.0 () lds ! brandenburg ! de
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> > > Graeme Fowler <graeme@graemef.net> schrieb am 26.02.2007 um 15:55 in Nachricht
<45E2F4C5.80909@graemef.net>:
> Hi
> 
> On 26/02/2007 13:31, Stephan Hendl wrote:
> > > Are you using persistence?
> > 
> > the default lvs parameters only
> 
> There aren't any LVS defaults with regards to virtual/realserver 
> settings. I suppose this would be a good time to ask for the output from 
> "ipvsadm -L -n".
> 
[root ~]# ipvsadm -L -n
IP Virtual Server version 1.2.0 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  <VIP>:80 wlc
  -> 192.168.232.212:80           Masq    5      0          0
  -> 192.168.232.211:80           Masq    2      0          0
  -> 192.168.232.214:80           Masq    10     0          0
  -> 192.168.232.213:80           Masq    10     0          0

> > > What tool are you using to run the test?
> > http_load (http://www.acme.com/jef/)
> > 
> > root# ./http_load -parallel 200 -seconds 60 ../ism_baseline.txt
> 
> OK, so you're simulating 200 simultaneous connections.
> 
> > > Do you get any errors in your Apache logs (assuming Apache server)?
> > no error messages at all
> 
> But then you say...

sorry, after the first question I tested a bit more with two servers instead of one \
in order to see how the system works with more than one test-client

> 
> > no, with two server at the same time I got the apache error:
> > 
> > [Mon Feb 26 12:47:27 2007] [error] server reached MaxClients setting, 
> consider raising the MaxClients setting
> 
> Not entirely surprising. Apache defaults (if I recall) to a MaxClients 
> setting of either 100 or 200, which you are going to exceed with your test.
> 
> Make MaxClients something like 500 and run the tests again. It looks 
> like your problems aren't LVS related, but application tuning is needed 
> instead.
> 

I'll try it.

> Graeme
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