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<p class="MsoNormal">Bonjour, Quentin!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Are you trying to set up 2 instances of Bucardo, one replicating from A to B and another one from B to A? (I think there may be a typo in the part where you paste your configuration, you said “server1” twice).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Please, try to set up just 1 instance of Bucardo, and try adding both databases as “source”. Then please repeat the tests and let’s see how that works.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When you create a new sync with 2 databases in 2 nodes (with a single instance of Bucardo), you will notice that a new schema (bucardo) appears on all the databases and some triggers appear on all tables.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In this schema there are some tables that bucardo uses to keep track of the “deltas” as well as some tables with per-table (in the public or the other schemas) information.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Why am I telling you this? Because this is key: You can have bidirectional replication between nodes A and B with Bucardo software installed only on node A, B, or even on a different node C!
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If Bucardo software is installed in node A and node A goes down, triggers in the tables in node B will populate the tables in the bucardo schema in node B. When node A goes back up, the Bucardo software processes (KID
and CTL) will read and process those contents and process the replication, handling conflicts should there be any (“man bucardo” and search for “conflict”).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Please, try and let us know. And @rest, please correct me if I’m wrong on anything :)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Good luck!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Kike<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Bucardo-general <bucardo-general-bounces@bucardo.org>
<b>On Behalf Of </b>Support EDI via Bucardo-general<br>
<b>Sent:</b> jueves, 24 de noviembre de 2022 11:51<br>
<b>To:</b> bucardo-general@bucardo.org<br>
<b>Subject:</b> [Bucardo-general] NUMLOG / BUCARDO - Only half of insert are done in database<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Carlito",serif">Dear Bucardo team,<br>
<br>
Few weeks ago I started working on building a postgresql cluster (in master / master mode) composed of 3 VM with Debian 11 installed.</span><o:p></o:p></p>
<ul type="disc">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1">
<span style="font-family:"Carlito",serif">1 server is running an HA proxy server (version 2.2.9). It is used to provide load balancing features</span><o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo1">
<span style="font-family:"Carlito",serif">2 Postgresql server (version 13.8) and Bucardo (version 5.6.0). Bucardo is used here to provide high availability with a master / master mode.</span><o:p></o:p></li></ul>
<p class="MsoNormal"><span style="font-family:"Carlito",serif">I have tested inserting data in each database server locally and every data is available on each server. So the master / master looks working fine.<br>
Then I have tried to insert data from a distant server through the HA Proxy server and I have noticed that only the half of the insert are available in postgresql.<br>
<br>
I have analyzed logs of the 3 softwares to find where something goes wrong and think it comes from bucardo.
</span><br>
<span style="font-family:"Carlito",serif">In this case I tried to insert 4 rows in a table named "files". In postgresql only 2 entries are available. The 2 entries are the same on both postgresql server.</span>
<o:p></o:p></p>
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<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2">
<span style="font-family:"Carlito",serif">First I checked HA proxy logs and find that it was well redirecting 50% of insert on server 1 and 50% on server 2. No error in its logs so I presume that it really works fine.</span><o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2">
<span style="font-family:"Carlito",serif">Then I checked Postgresql log. In Postgresql logs I cannot see any error and I can't see any attempt to insert the missing values. I have changed log level to ensure I'm not missing something but without success.</span><o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo2">
<span style="font-family:"Carlito",serif">At last I have checked in Bucardo and find below logs :
</span><o:p></o:p></li></ul>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Got NOTICE run_sync_oneToTwo from 292748 (Bucardo DB) (line 3113)</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Adding entry to syncrun table</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Populating the dbrun table</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Adding note to the syncrun table</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Doing final maindbh commit</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Set database "serv1" to repeatable read read write</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Set database "serv2" to repeatable read read write</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Checking truncate_trigger table on database "serv1"</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Sequence public.files_code_seq from db serv1 is the highest</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Tables with deltas on serv1: 1 Without: 0</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Delta count for serv1.public.files : 2</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Total delta count: 2</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Setting session_replication_role to replica for database serv2</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Rows to push from serv1.public.files: 2</span><br>
<b><span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Deleting from target serv2.public.files (round 1 of 1)</span></b><b><br>
</b><b><span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Rows deleted from serv2.public.files: 2</span></b><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Copying from serv1.public.files</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Rows copied to (postgres) serv2.public.files: 2</span><br>
<b><span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Totals: deletes=2 inserts=2 conflicts=0</span></b><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Rows inserted to bucardo_track for serv1.public.files : 2</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Setting session_replication_role to default for database serv2</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Issuing final commit for all databases</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) All databases committed</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Total time for sync "sync_oneToTwo" (2 rows, 1 table): 0.05 secondes</span><br>
<span style="font-family:"Courier New"">(292750) [Mon Nov 21 10:46:30 2022] KID (sync_oneToTwo) Sending NOTIFY "ctl_syncdone_sync_oneToTwo" (line 4937) skip_commit=0</span><o:p></o:p></p>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="font-family:"Carlito",serif">I'm not sure I correctly understand bucardo logs as I'm not experimented using it, but it looks like it deletes 2 raws in a server 2 and has pushed 2 raws from server 1.</span><o:p></o:p></p>
</blockquote>
<p class="MsoNormal"><span style="font-family:"Carlito",serif">My first question is, is my analysis correct or am I wrong?<br>
My second question if I'm right is how should I set up Bucardo to avoid this issue. I'm sure I'm doing something wrong but I can't find what's wrong.<br>
My second question if I'm wrong, do you have any idea of the cause of the issue?<br>
<br>
On server1, my bucardo set up is : <br>
<br>
</span><span style="font-family:"Courier New"">-- dbgroups:<br>
dbgroup: sync_oneToTwo Members: serv1:source serv2:target<br>
-- databases:<br>
Database: serv1 Status: active Conn: psql -p 5432 -U bucardo -d hubmaster -h ***.**.**.24<br>
Database: serv2 Status: active Conn: psql -p 5432 -U bucardo -d hubmaster -h ***.**.**.25<br>
-- relgroup:<br>
Relgroup: one_two DB: serv1 Members: public.files, public.files_code_seq<br>
Used in syncs: sync_oneToTwo<br>
-- syncs:<br>
Sync "sync_oneToTwo" Relgroup "one_two" DB group "sync_oneToTwo" serv1:source serv2:target [Active]<br>
-- tables:<br>
2. Table: public.files DB: serv2 PK: code (integer)<br>
1. Table: public.files DB: serv1 PK: code (integer)<br>
-- sequences:<br>
Sequence: public.files_code_seq DB: serv1<br>
Sequence: public.files_code_seq DB: serv2</span><span style="font-family:"Carlito",serif"><br>
</span><br>
<span style="font-family:"Carlito",serif">On server1, my bucardo set up is : <br>
<br>
</span><span style="font-family:"Courier New"">-- dbgroups:<br>
dbgroup: sync_oneToTwo Members: serv1:source serv2:target<br>
-- databases:<br>
Database: serv1 Status: active Conn: psql -U bucardo -d hubmaster -h ***.**.**.25<br>
Database: serv2 Status: active Conn: psql -U bucardo -d hubmaster -h ***.**.**.24<br>
-- relgroup:<br>
Relgroup: one_two DB: serv1 Members: public.files, public.files_code_seq<br>
Used in syncs: sync_oneToTwo<br>
-- syncs:<br>
Sync "sync_oneToTwo" Relgroup "one_two" DB group "sync_oneToTwo" serv1:source serv2:target [Active]<br>
-- tables:<br>
1. Table: public.files DB: serv1 PK: code (integer)<br>
2. Table: public.files DB: serv2 PK: code (integer)<br>
-- sequences:<br>
Sequence: public.files_code_seq DB: serv1<br>
Sequence: public.files_code_seq DB: serv2<br>
</span><span style="font-family:"Carlito",serif"><br>
Thanks in advance for any help provided.<br>
<br>
Best regards</span><o:p></o:p></p>
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<o:p></o:p></p>
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<strong><span style="font-size:12.0pt;font-family:"Rubik",serif;color:#1A084B">Quentin BIENFAIT
</span></strong><br>
<b><span style="font-size:8.5pt;color:#45BED7">Equipe EDI / EDI Team </span></b><o:p></o:p></p>
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<strong><span style="font-size:9.0pt;font-family:"Rubik",serif;color:#1A084B"><a href="mailto:support.edi@numlog.fr"><span style="color:#1A084B">Mail :</span><span style="color:#1A084B;text-decoration:none"> </span><span style="color:#1A084B;text-decoration:none">support.edi@numlog.fr</span></a>
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30 79 16 16 (choix 2)</span></a> </span></strong><br>
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