Load balancing algorithm

[pratik]

Hi,

Our app has quite a few slow running processes, which forced us to use HAProxy for fair load balancing in front of Apache/Mongrel. I think LiteSpeed will be a great choice to replace our current setup. Could anyone tell me how litespeed does load balancing between multiple spawned chil processed ?

Thanks.

 

[mistwang]

LiteSpeed always try to use the minimum number of processes and assign request to the most recently used process.

 

[pratik]

So what happens if the most recently used process is still serving previous request ( which is a very slow request ) ? Will the new request block ? Or does LS keep information about every processes's state ( i.e. free/busy etc. ) ?

Thanks.

 

[mistwang]

Yes, LiteSpeed uses persistent connection between web server and external app process, so LS keep tracking state of connection.

 

[pratik]

Ah perfect!

Thanks a lot.