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@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@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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