[SR-Users] DMQ Usrloc/Dialog - Experiences

[Carsten Bock]

Hi Julien,

thanks for your reply - I really appreciate your feedback and your
presentations at KamailioWorld, I hope to see you again in person soon.

Can you share some details on how many records you synchronize using DMQ
and if you ever experienced any loss of records while synchronization using
DMQ? The issue is, that on IMS the registration is typically set to 600000
seconds (1 week), as we have other mechanisms to get notified if a user is
dropping out of the network (we get notifications from the LTE network
itself) and a loss of registration data would result in a user not being
reachable for a long period of time.

Thanks,
Carsten
--
Carsten Bock I CTO & Founder

ng-voice GmbH

Trostbrücke 1 I 20457 Hamburg I Germany
T +49 179 2021244 I www.ng-voice.com

Registry Office at Local Court Hamburg, HRB 120189
Managing Directors: Dr. David Bachmann, Carsten Bock


Am Mo., 29. Nov. 2021 um 18:09 Uhr schrieb Julien Chavanton <
jchavanton at gmail.com>:

> Hi Carsten, from my experience Usrloc + DMQ works very well, rare
> replication race conditions are insignificant since the state is quite
> volatile anyway.
>
> However you can only have that many nodes, great for clustering.
>
> On Mon, Nov 29, 2021 at 6:47 AM Carsten Bock <carsten at ng-voice.com> wrote:
>
>> Hi,
>>
>> I wanted to quickly ask the group about experiences with DMQ and
>> Usrloc/Dialog.
>>
>> I don't expect any issues when choosing such an approach, especially
>> since we would have re-transmits for a message (fr_timer = 30 seconds) if
>> we did not receive any answers or scenarios alike. So I assume, having
>> short "outages" (less than 30 seconds) for the communication is just fine.
>>
>> So far I used DMQ in a non-IMS setup for synchronizing usrloc with ~15k
>> Subscribers and it worked really well.
>>
>> One concern brought up (not by me) was, that synchronizing usrloc with
>> DMQ might not be reliable at scale. I would also love to understand how to
>> treat situations when the communication is lost for a longer period of time
>> (e.g. if the communication between nodes is lost for 5 minutes?).
>>
>> Can anyone share some real-life experiences?
>>
>> Thanks,
>> Carsten
>>
>>
>>
>>
>> --
>> Carsten Bock I CTO & Founder
>>
>> ng-voice GmbH
>>
>> Trostbrücke 1 I 20457 Hamburg I Germany
>> T +49 179 2021244 I www.ng-voice.com
>>
>> Registry Office at Local Court Hamburg, HRB 120189
>> Managing Directors: Dr. David Bachmann, Carsten Bock
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