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Re: [HACKERS] [PATCH] Provide 8-byte transaction IDs to user level

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Darcy Buskermolen <darcyb(at)commandprompt(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-patches(at)postgresql(dot)org,Bruce Momjian <bruce(at)momjian(dot)us>, Marko Kreen <markokr(at)gmail(dot)com>,pgsql-hackers(at)postgresql(dot)org, Jan Wieck <JanWieck(at)yahoo(dot)com>
Subject: Re: [HACKERS] [PATCH] Provide 8-byte transaction IDs to user level
Date: 2006-07-26 21:35:42
Message-ID: 20060726213542.GC10799@surnet.cl (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-patches
Darcy Buskermolen wrote:
> On Wednesday 26 July 2006 14:03, Tom Lane wrote:
> > Darcy Buskermolen <darcyb(at)commandprompt(dot)com> writes:
> > >> The question though is if we did that, would Slony actually use it?
> > >
> > > If it made sence to do it, then yes we would do it. The problem ends up
> > > being Slony is designed to work across a multitude of versions of PG, and
> > > unless this was backported to at least 7.4, it would take a while (ie
> > > when we stopped supporting versions older than it was ported into) 
> > > before we would make use of it.
> >
> > [ shrug... ]  That's not happening; for one thing the change requires a
> > layout change in pg_control and we have no mechanism to do that without
> > initdb.
> 
> I'll take a bit more of a look through the patch and see if it is a real boot 
> to use it on those platforms that support it, and that we have a suitable way 
> around it on those that don't.   But at this point I wouldn't hold my breath 
> on that

The alternative seems to be that the Slony-I team doesn't feel they have
a need for it, nobody else pushes hard enough for the feature to be in
core, and thus Slony-I and all the rest stays broken forever.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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