Re: [PATCH 10/16] Introduce the concept that wal has a 'origin' node

On Wednesday, June 20, 2012 03:19:55 PM Robert Haas wrote:
> On Wed, Jun 20, 2012 at 5:47 AM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> > The idea that logical rep is some kind of useful end goal in itself is
> > slightly misleading. If the thought is to block multi-master
> > completely on that basis, that would be a shame. Logical rep is the
> > mechanism for implementing multi-master.
>
> If you're saying that single-master logical replication isn't useful,
> I disagree. Of course, having both single-master and multi-master
> replication together is even more useful. But I think getting even
> single-master logical replication working well in a single release
> cycle is going to be a job and a half. Thinking that we're going to
> get MMR in one release is not realistic. The only way to make it
> realistic is to put MMR ahead of every other goal that people have for
> logical replication, including robustness and stability. It's
> entirely premature to be designing features for MMR when we don't even
> have the design for SMR nailed down yet. And that's even assuming we
> EVER want MMR in core, which has not even really been argued, let
> alone agreed.
I agree it has not been agreed uppon, but I certainly would consider
submitting a prototype implementing it an argument for doing it ;)

Andres
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Andres Freund http://www.2ndQuadrant.com/
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