[SR-Users] Load Balancing

[Alex Balashov]

On 12/28/2011 07:21 AM, Ronald Kiel wrote:

> I understand Kamailio has the Dispatcher-module for load-balancing.
>  OpenSIPS has both a Dispatcher-module and a LB-module, which seems
> to offer improved functionality. Is there also something like the
> LB-module in Kamailio?

No, there's nothing in Kamailio that implements what the LB module 
does, exactly.  However, I wouldn't call the LB module 'improved' 
functionality;  it extends a particular subset of 'dispatcher' in a 
specific way, nothing more.

Furthermore, with Kamailio it is relatively trivial to come up with 
your own load-aware routing process in route script.  I think that's 
one reason it doesn't get wrapped in a module.  If you want to 
periodically poll some outside source for load information, define a 
periodic 'rtimer' process that can go out and do that:

    http://www.kamailio.org/docs/modules/3.2.x/modules_k/rtimer.html

Store the results in 'htable' or some other data structure, and then 
check it when routing calls.  And that's all there is to it.  :-)  Now 
you can implement skills-based routing or anything else esoteric, 
because the algorithm is 100% yours to override.

-- Alex

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