Re: Load balancing with load detection on backend servers ?

[Daniel Ruggeri <druggeri@xxxxxxxxxxx>]

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

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From: Jim Jagielski <jim@xxxxxxxxxxx>
Sent: November 20, 2014 7:36:11 AM CST
To: users@xxxxxxxxxxxxxxxx
Subject: Re: 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.Herbst@xxxxxxxxxxxxx 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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