Re: WIP partial replication patch

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От Andres Freund
Тема Re: WIP partial replication patch
Дата
Msg-id 20100813194227.GA2856@anarazel.de
обсуждение исходный текст
Ответ на Re: WIP partial replication patch  (Boszormenyi Zoltan <zb@cybertec.at>)
Ответы Re: WIP partial replication patch  (Boszormenyi Zoltan <zb@cybertec.at>)
Список pgsql-hackers
On Fri, Aug 13, 2010 at 09:36:00PM +0200, Boszormenyi Zoltan wrote:
> Tom Lane írta:
> > Boszormenyi Zoltan <zb@cybertec.at> writes:
> >
> >> attached is a WIP patch that will eventually implement
> >> partial replication, with the following syntax:
> > This fundamentally cannot work, as it relies on system catalogs to be
> > valid during recovery.
> Just like Hot Standby, no? What is the difference here?
> Sorry for being ignorant.
In HS you can only connect after youve found a restartpoint - only
after that you know that you have reached a consistent point for the
system.

I think this is fixable by keeping more wal on the standby's but I
need to think more about it.

Andres


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