Re: Configuring synchronous replication

From: Markus Wanner <markus(at)bluegap(dot)ch>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Simon Riggs <simon(at)2ndquadrant(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, jd(at)commandprompt(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: 2010-09-24 07:33:16
Message-ID: 4C9C543C.2070500@bluegap.ch
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On 09/23/2010 10:09 PM, Robert Haas wrote:
> I think maybe you missed Tom's point, or else you just didn't respond
> to it. If the master is wedged because it is waiting for a standby,
> then you cannot commit transactions on the master. Therefore you
> cannot update the system catalog which you must update to unwedge it.
> Failing over in that situation is potentially a huge nuisance and
> extremely undesirable.

Well, Simon is arguing that there's no need to wait for a disconnected
standby. So that's not much of an issue.

Regrads

Markus Wanner

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