[SR-Users] Can following scenario be implemented using Kamilio

[Alex Balashov]

On 03/03/2015 12:08 PM, Jayanth Acharya wrote:

> I am new to Kamilio (and SIP in general), but a quick research tells
> that I've to configure Kamilio to run in the transaction stateful mode,
> which in turn brings down it's performance. Is that correct ?

No, not really. :-)  This is true, strictly speaking, in a purely 
formal, computational sense, because maintaining state does entail more 
overhead. However, the advice to limit use of transaction-stateful mode 
for performance reasons really harks back to a different time in the 
evolution of computing hardware. With modern CPUs this difference is not 
significant, and Kamailio's internal architecture is still very 
performance-oriented.

Moreover, I would say 90%+ of useful uses of Kamailio, such as this one, 
require transaction state. There's not much that can be done just by 
routing SIP messages ad hoc, based on their content alone. I think the 
only real use-case for stateless relay these days is a fire-and-forget 
load balancer.

Opinions on this do vary, but regardless, you should not have any 
compunctions about using TM. If you look around on the web for example 
configs to do anything, virtually all of them use TM -- for a reason.

-- Alex

-- 
Alex Balashov - Principal
Evariste Systems LLC
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