Re : Very asynchrnous replication system

Ben,

As far as I can see MusicBrainz only does one way replication (which I already achieved).
Two ways replication (without re-sending the information you have just received) is a bit more complex.

I could not find much info on the MusicBrainz project anyway.

Thanks,
L(at)u
The Computing Froggy

----- Message d'origine ----
De : Ben <bench(at)silentmedia(dot)com>
À : Laurent ROCHE <laurent_roche(at)yahoo(dot)com>
Cc : pgsql-general(at)postgresql(dot)org
Envoyé le : Samedi, 6 Octobre 2007, 2h49mn 59s
Objet : Re: [GENERAL] Very asynchrnous replication system

The MusicBrainz project replicates in a way that sounds like it could fit your needs. It depends on a lot of perl, but if that's not a showstopper, then maybe adapting their replication scheme would work for you.
On Oct 5, 2007, at 5:25 PM, Laurent ROCHE wrote:

Hello,

I must replicate (or synchronise) data between disconnected postgreSQL databases ... hence a replication "very asynchronous"!

Application description
This an application to manage sales forces with a central application (and postgreSQL server) where everybody in the office can connect (this a web application: Tomcat with Spring 2+ Struts 2 + iBatis + PostgreSQL).
But there are also "little itinerant applications": the sales rep have the application on their laptop and a PosgreSQL server with a copy of the data (they are interested in ) from the main server database.
From time to time, the sales reps connect to the internet and request a data synchronisation: they send their modification and receive the headquarters modification.
(no problem about data overlap: the data owner is clearly identified by the application framework)

My problem:
Does such an existing system (the replication one) exist ?
I search the web I did not find anything !
I have started to do something (with triggers, log table and table export - using DDL-Utils) ... but looking at the spreadth of the task layed out in front of me, I am thinking that I will be better off using or adapting an existing replication system

Have fun,
L(at)u
The Computing Froggy

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