Horton

Re: Synchronous replication - patch status inquiry

Simon Riggs <simon@2ndquadrant.com>

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From: Simon Riggs <simon@2ndQuadrant.com>
To: Fujii Masao <masao.fujii@gmail.com>
Cc: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>, Robert Haas <robertmhaas@gmail.com>, David Fetter <david@fetter.org>, Bruce Momjian <bruce@momjian.us>, fazool mein <fazoolmein@gmail.com>, pgsql-hackers@postgresql.org
Date: 2010-09-02T12:03:38Z
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.linnakangas@enterprisedb.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           www.2ndQuadrant.com
 PostgreSQL Development, 24x7 Support, Training and Services