[SR-Users] Kamailio weighted dispatch problems

[Henning Westerholt]

Hi Jasen,

I see. if you can confirm that you call it correctly in the ds_select function call - then please open a bug report about it in our github issue tracker.

Cheers,

Henning

Am 16.10.19 um 17:51 schrieb Jasen Hall:
Thanks for the reply, Henning.

I have tried an embarrassing variety of weights thinking I was misinterpreting the instructions. I've tried weight divisions of: 1/3, 10/30, 90/9, 90/10,100/0, 90/30, and more; all with the hopes of generating any variance in a straight split of the traffic. In every case I get an almost equal split of calls dispatched.

On Wed, Oct 16, 2019 at 3:15 AM Henning Westerholt <hw at skalatan.de<mailto:hw at skalatan.de>> wrote:
Hello Jasen,

just a quick guess – but have you already tried with a larger value suggested from the documentation?

>1 sip:10.0.0.1:5060<http://10.0.0.1:5060> weight=75
>1 sip:10.0.0.2:5060<http://10.0.0.2:5060> weight=25

Cheers,

Henning

--
Henning Westerholt - https://skalatan.de/blog/
Kamailio services - https://skalatan.de/services

From: sr-users <sr-users-bounces at lists.kamailio.org<mailto:sr-users-bounces at lists.kamailio.org>> On Behalf Of Jasen Hall
Sent: Tuesday, October 15, 2019 6:56 PM
To: sr-users at lists.kamailio.org<mailto:sr-users at lists.kamailio.org>
Subject: [SR-Users] Kamailio weighted dispatch problems

I am trying to change our request dispatching from round-robin to a weight-based method (ds_select_dst() algorithm 9 vs. algorithm 4) and am having a hard time getting an asymmetrical dispatch pattern enabled. In testing, I'm dispatching to two Ringswitch servers and trying to send three times the traffic to one instance.

My destinations list file previously set both endpoints in the same group and simply provided the SIP URI for each. My new list file adds the attribute `weight` to each endpoint and looks like this:

>1 sip:10.0.0.1:5060<http://10.0.0.1:5060> weight=3
>1 sip:10.0.0.2:5060<http://10.0.0.2:5060> weight=1

However, when I throw a couple thousand calls at Kamailio, I always end up with an almost perfect split of calls to both ringswitches. Regardless of the weights I choose, I never see variation in the dispatched load.

Does anyone have experience with this issue and have some guidance?

Thanks in advance.

--
Jasen Hall | Invoca
Site Reliability Engineer

www.invoca.com<http://www.invoca.com>

[See                              the list]<https://invoca.sigstr.net/uc/5cba111d3527a200469b9afd>


--
Jasen Hall | Invoca
Site Reliability Engineer

www.invoca.com<http://www.invoca.com>

[See the list]<https://invoca.sigstr.net/uc/5cba111d3527a200469b9afd>

--
Kamailio Merchandising - https://skalatan.de/merchandising/
Kamailio services - https://skalatan.de/services
Henning Westerholt - https://skalatan.de/blog/
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