| From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Thom Brown <thom(at)linux(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Dave Page <dpage(at)pgadmin(dot)org>, Peter Eisentraut <peter_e(at)gmx(dot)net>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Configuring synchronous replication |
| Date: | 2010-09-22 17:39:41 |
| Message-ID: | 1285177181.25937.15.camel@jd-desktop.unknown.charter.com |
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| Thread: | |
| Lists: | pgsql-committers pgsql-hackers |
On Wed, 2010-09-22 at 13:26 -0400, Tom Lane wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> > On Wed, Sep 22, 2010 at 1:09 PM, Joshua D. Drake <jd(at)commandprompt(dot)com> wrote:
> >> On Wed, 2010-09-22 at 13:00 -0400, Robert Haas wrote:
> >>> But it CAN'T be a system catalog, because, among other problems, that
> >>> rules out cascading slaves, which are a feature a lot of people
> >>> probably want to eventually have.
> >>
> >> I guarantee you there is a way around the cascade slave problem.
>
> > And that would be...?
>
> Indeed. If it's a catalog then it has to be exactly the same on the
> master and every slave; which is probably a constraint we don't want
> for numerous reasons, not only cascade arrangements.
Unless I am missing something the catalog only needs information for its
specific cluster. E.g; My Master is, I am master for.
Joshua D. Drake
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