[SR-Users] how to make dispatcher module use more than one tcp connections to the destinations?

Allen Zhang Allen.Zhang at imgtec.com
Thu Jul 11 23:02:02 CEST 2013


Hi Daniel,

Oh I missed the reply for some reason. Thank you very much for both replying and reminding :)
We do want to receive the replies so closing the connection isn't an option. Listening on multiple tcp ports sound like a good temporary solution, but lack of scalability?

Regards,

Allen


From: Daniel-Constantin Mierla [mailto:miconda at gmail.com]
Sent: Thursday, 11 July 2013 9:58 p.m.
To: Kamailio (SER) - Users Mailing List; Allen Zhang
Subject: Re: [SR-Users] how to make dispatcher module use more than one tcp connections to the destinations?

Hello,

have you seen the reply:

http://lists.sip-router.org/pipermail/sr-users/2013-July/078830.html

?

Cheers,
Daniel
On 7/10/13 11:04 PM, Allen Zhang wrote:
Hi list,

I have a loadbalancer before sipproxies. I call t_reley() on the dispatcher to forward requests to  destinations.
All goes well under low load.
But when load goes up to 500 requests/s, the loadbalancer still sends requests via only one tcp connection. This maxes out the tcp write queue.
Of course I can increase the 'tcp_conn_wq_max' value but it doesn't solve the root problem.
How  do I make the loadbalancer start a new tcp connection to the destination when existing one becomes too busy? (Is it possible?)

Regards,

Allen



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Daniel-Constantin Mierla - http://www.asipto.com

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