Hello Sergiu,

Interesting. I suspected something like this in the past as well but never looked into the randomness features in uac.

Let’s wait a bit if somebody else might comment on it, otherwise please open an issue about it on our tracker.

Cheers,

Henning

Henning Westerholt – https://skalatan.de/blog/

From: Sergiu Pojoga <pojogas@gmail.com>
Sent: Wednesday, November 3, 2021 4:41 AM
To: Henning Westerholt <hw@gilawa.com>
Cc: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
Subject: Re: [SR-Users] UAC reg_random_delay

Hi Henning,

That's my understanding as well, but in reality seems like it all happens simultaneously, without some kind of delay.

Here's what I have:

· modparam("uac", "reg_random_delay", 20)

· 10 uac records

· expires=300

· reg_delay=0

kamcmd uac.reg_dump | egrep delay
reg_delay: 13
reg_delay: 7
reg_delay: 3
reg_delay: 2
reg_delay: 8
reg_delay: 1
reg_delay: 2
reg_delay: 14
reg_delay: 17
reg_delay: 18

Following restart of Kamailio:

· 1st x10 REGISTERs are all sent out the same millisecond.

· Contacts saved, received 200 OK with Expires: 300

· after 280 seconds, another x10 REGISTERs are all sent out the same millisecond

· and so on

Thanks.

On Tue, Nov 2, 2021 at 2:59 PM Henning Westerholt <hw@gilawa.com> wrote:

Hello,

this are two different concepts:

· reg_random_delay is a global parameter to randomize the registration delay for the records

· reg_delay is a parameter for the individual contacts

So it seems to randomize the reg_delay value due to the set reg_random_delay for records with reg_delay = 0.

Could you maybe also observe a second registration after the initial registration, if it stills send out all requests the same time?

Cheers,

Henning

--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com

From: sr-users <sr-users-bounces@lists.kamailio.org> On Behalf Of Sergiu Pojoga
Sent: Monday, November 1, 2021 4:20 PM
To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
Subject: [SR-Users] UAC reg_random_delay

Hi there,

May I know what exactly is supposed to be "delayed" in the UAC registration?

modparam("uac", "reg_random_delay", 20)

I have records stored in DB with reg_delay=0. When doing uac.reg_dump, I do see the value of reg_delay being random for various records.

However, after restarting Kamailio, the registrations are all sent out simultaneously, there doesn't seem to be a "delay", whatever the purpose is supposed to be.

Can someone clarify please?

Kamailio 5.5.0

Thanks. Regards,

--Sergiu