Re: [COMMITTERS] pgsql: Remove replicaiton FAQ item.

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Mischa Sandberg <mischa(dot)sandberg(at)telus(dot)net>
Cc: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, Jeff Davis <jdavis-pgsql(at)empires(dot)org>, "Marc G(dot) Fournier" <scrappy(at)postgresql(dot)org>, Robert Treat <xzilla(at)users(dot)sourceforge(dot)net>, PostgreSQL-documentation <pgsql-docs(at)postgresql(dot)org>
Subject: Re: [COMMITTERS] pgsql: Remove replicaiton FAQ item.
Date: 2005-04-24 23:24:36
Message-ID: 200504242324.j3ONOaO26057@candle.pha.pa.us
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Mischa Sandberg wrote:
> Quoting Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>:
>
> > Joshua D. Drake wrote:
> > > Jeff Davis wrote:
> > > > Should the text include a mention of synchronous vs.
> > asynchronous? Or
> > > > does master-master imply synchronous?
> > >
> > > It shouldn't. It is possible to have synchronous replication
> > without it
> > > being master<->master.
> >
> > We could mention async vs sync but at the FAQ stage I think the
> > multi-master/master-slave disinction is enough. Let's see what
> > questions
> > we get.
>
> About all you can say is, it is not possible to implement synchronous
> master-master replication, because of conflict resolution of
> simultaneous transactions.

You mean asynchronous master-master? There are some implementations
(Sybase?, pgreplicator) that do this and have conflict resolution.

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