From: | Andrew Sullivan <ajs(at)crankycanuck(dot)ca> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: why vacuum |
Date: | 2005-10-27 10:21:20 |
Message-ID: | 20051027102120.GA26612@phlogiston.dyndns.org |
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Thread: | |
Lists: | pgsql-sql |
On Thu, Oct 27, 2005 at 10:22:41AM +0200, Mario Splivalo wrote:
> offers no replication at all, you need to use slony (wich is also a poor
> replacement for a wannabe replication), or some other commercial
> products. What about 2PC? What about linking the databases from
Slony is in fact a community-supported system; so I don't know why
you think that amounts to "no replication at all". And since this is
a community-supported system, it'd be nice if you said why it's a
"poor replacement for wannabe replication". What's wrong with it?
> Btw, I 'ported' the merge replication from MSSQL to postgres. It
> basicaly adds triggers to every table that is 'published' for
> replication. There is a separate table to store and calculate the change
> differences from several servers (so you could do update on any of the
> servers and change will be propagated to the others). I'm missing 2PC
> badly here, I wrote some stupid python 'thingie' wich should act as 2PC
> serializer, but that's slow as hell. And triggers slow down postgres
> quite a bit.
This is interesting. Care to package it up for others, or write a
proof-of-concept outline for the lists or General Bits or something
like that? This is a different sort of replication people are asking
for. Note that you get 2PC in the next Postgres release.
A
--
Andrew Sullivan | ajs(at)crankycanuck(dot)ca
When my information changes, I alter my conclusions. What do you do sir?
--attr. John Maynard Keynes
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