[SR-Users] UAC reg_random_delay

[Henning Westerholt]

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/
Kamailio services – https://gilawa.com<https://gilawa.com/>

From: Sergiu Pojoga <pojogas at gmail.com>
Sent: Wednesday, November 3, 2021 4:41 AM
To: Henning Westerholt <hw at gilawa.com>
Cc: Kamailio (SER) - Users Mailing List <sr-users at 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 at gilawa.com<mailto:hw at 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<https://gilawa.com/>

From: sr-users <sr-users-bounces at lists.kamailio.org<mailto:sr-users-bounces at lists.kamailio.org>> On Behalf Of Sergiu Pojoga
Sent: Monday, November 1, 2021 4:20 PM
To: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org<mailto:sr-users at 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
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