The guts are all there for this to work on the proxy side. We just need to make 
a module out of it. The question of header name and what-not can be solved by 
making it configurable. The real $1,000,000 question is what your backend is 
and how you can gather load information. This would be trivial to do with a  
Servlet filter in a J2EE app, but I am not sure about other implementations (my 
own ignorance rather than it being technically impossible).
-- 
Daniel Ruggeri


-------- Original Message --------
From: Jim Jagielski <j...@jagunet.com>
Sent: November 20, 2014 7:36:11 AM CST
To: users@httpd.apache.org
Subject: Re: [users@httpd] Load balancing with load detection on backend 
servers ?

The only real question is how the load value of the backend
systems can be known and then "told" to Apache. I had proposed
awhile ago using some sort of custom HTTP X-header to send that
info.

> On Nov 19, 2014, at 3:28 AM, ulrich.her...@t-systems.com wrote:
> 
> Hi all,
>  
> I know the load_balancing-policies bybusyness, byrequests, bytraffic and 
> heartbeat.
>  
> We have a frontend apache, that acts as forwarding proxy to 8 backend servers.
> BUT: We want do route the next request to that backend server with least load.
>  
> Is there any apache module, that can do this ?
> (We use linux and apache 2.4)
>  
> Heartbeat is not usable, because our backends do not run apache, but 
> something else.
>  
> Uli


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