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Hi Daniel,</div>
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Thanks for the reply, I will use the server_id method that should work for changes required.</div>
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Many thanks!</div>
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Jon</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Daniel-Constantin Mierla <miconda@gmail.com><br>
<b>Sent:</b> 19 February 2020 12:28<br>
<b>To:</b> Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>; Jonathan Hunter <hunterj91@hotmail.com>; Kamailio (SER) - Users Mailing List <sr-users@lists.sip-router.org><br>
<b>Subject:</b> Re: [SR-Users] Active-Active Registrar setup with users behind NAT persistence in event of server failure</font>
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<p style="margin-top: 0px; margin-bottom: 0px;">Hello,</p>
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<p style="margin-top: 0px; margin-bottom: 0px;">I didn't spent time on understanding the exact issue, but from database point of view, do you want to avoid having two different tables for specific reasons, like external applications accessing it?</p>
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<p style="margin-top: 0px; margin-bottom: 0px;">Have you looked at setting the server_id, maybe that can help to have the records grouped by each server.</p>
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<p style="margin-top: 0px; margin-bottom: 0px;">Cheers,<br>
Daniel<br>
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<div class="x_moz-cite-prefix">On 19.02.20 09:40, Jonathan Hunter wrote:<br>
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<span>Hi Guys,<br>
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<div>I have a quick question wondered if anyone could provide some suggestions please?!<br>
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<div>We have a setup of two registrars in EC2 (kamailio 4.4 running on debian VMs) which act in an active/active fashion with a number of devices<br>
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<div>behind NAT where we use the DMQ dmq_t_replicate function to send the registration details between each server and append the PATH parameter<br>
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<div>so the registrar the device registered with is always associated with the client device.<br>
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<div>This all works fine, the only issue is persistency should we have a failure of one of the registrars, be it process or server and recovering the correct<br>
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<div>PATH detail so the end device can still be reached.<br>
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<div>I have tried this with separate databases with each registrar, which works when using cache and db but I ideally want the same database for the two servers and not<br>
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<div>change the architecture at this time unless it is a necessary.<br>
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<div>I have also tested with dmq_usrloc but this again provides the usrlocation details of the notification servers in the group(not path), again which I understand but I wondered<br>
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<div>if there is anything else I could try or its just a question of in the event of a failure half the registrations will be effected until it recovers and they<br>
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<div>re-register again if I dont want to have separate databases (location tables) or I add more network elements into the flow, such as HA pair or load balancer but just want to<br>
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<div>make sure I have exhausted all options or consider the risk before I look to do this. </div>
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<div>Many thanks!<br>
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<span>Jon</span><br>
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