Re: libpq changes for synchronous replication

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: libpq changes for synchronous replication
Date: 2010-11-19 15:25:13
Message-ID: 29581.1290180313@sss.pgh.pa.us
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Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> On Thu, Nov 18, 2010 at 7:43 AM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
>> The patch is touching protocol.sgml as follows. Isn't this enough?

> How about some updates to the "Message Flow" section, especially the
> section on "COPY Operations"?

Yeah. You're adding a new fundamental state to the protocol; it's not
enough to bury that in the description of a message format. I don't
think a whole lot of new verbiage is needed, but the COPY section needs
to point out that this is a different state that allows both send and
receive, and explain what the conditions are for getting into and out of
that state.

regards, tom lane

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