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Re: Synchronous replication - patch status inquiry

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
Cc: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, David Fetter <david(at)fetter(dot)org>, Bruce Momjian <bruce(at)momjian(dot)us>, fazool mein <fazoolmein(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Synchronous replication - patch status inquiry
Date: 2010-09-02 12:03:38
Message-ID: 1283429018.1834.445.camel@ebony (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
On Thu, 2010-09-02 at 19:24 +0900, Fujii Masao wrote:
> On Wed, Sep 1, 2010 at 7:23 PM, Heikki Linnakangas
> <heikki(dot)linnakangas(at)enterprisedb(dot)com> wrote:
> > That requirement falls out from the handling of disconnected standbys. If a
> > standby is not connected, what does the master do with commits? If the
> > answer is anything else than acknowledge them to the client immediately, as
> > if the standby never existed, the master needs to know what standby servers
> > exist. Otherwise it can't know if all the standbys are connected or not.
> Thanks. I understood why the registration is required.

I don't. There is a simpler design that does not require registration.

Please explain why we need registration, with an explanation that does
not presume it as a requirement.

 Simon Riggs 
 PostgreSQL Development, 24x7 Support, Training and Services

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