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
235 E Ponce de Leon Ave
Suite 106
Decatur, GA 30030
United States

Tel: +1-678-954-0670
Web: http://www.evaristesys.com/, http://www.alexbalashov.com/

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