On Wed, 2009-04-29 at 15:05 +0200, "Götz Rieger" wrote:
> I'm doing a load test now using The Grinder with four load test clients. The 
> problem I'm facing is an extremely uneven distribution of ActiveConn on the 
> real servers:

OK...

> [r...@lvst1 ~]# ipvsadm -L -n                                          
> IP Virtual Server version 1.2.1 (size=4096)                            
> Prot LocalAddress:Port Scheduler Flags                                 
>   -> RemoteAddress:Port           Forward Weight ActiveConn InActConn  
> TCP  194.xxx.xxx.xxx:80 rr                                              
>   -> 192.168.xxx.xxx:80            Masq    1      137        421        
>   -> 192.168.xxx.xxx:80            Masq    1      203        509        
>   -> 192.168.xxx.xxx:80            Masq    1      0          630
> 
> Prot LocalAddress:Port Scheduler Flags     
>   -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
> TCP  194.xxx.xxx.xxx:80 rr                                            
>   -> 192.168.xxx.xxx:80            Masq    1      232        424       
>   -> 192.168.xxx.xxx:80            Masq    1      5          418       
>   -> 192.168.xxx.xxx:80            Masq    1      3          419

A larger number of ActiveConns indicates a machine which is slower to
respond (that is, these connections have not reached TIME_WAIT or
FIN_WAIT), or a machine which has KeepAlive switched on in Apache.

Of more significance to you during testing would be:

ipvsadm -L -n --stats
ipvsadm -L -n --rate

If you use the "watch" utility you can watch these in real time:

watch -n1 -- "ipvsadm -L -n --stats; echo; echo; ipvsadm -L -n --rate"

BTW I presume you meant "lc" scheduler rather than "ll"?

Graeme


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