Horton

Re: Standalone synchronous master

Josh Berkus <josh@agliodbs.com>

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From: Josh Berkus <josh@agliodbs.com>
To: Stephen Frost <sfrost@snowman.net>
Cc: Andres Freund <andres@2ndquadrant.com>, "Joshua D. Drake" <jd@commandprompt.com>, Tom Lane <tgl@sss.pgh.pa.us>, Kevin Grittner <kgrittn@ymail.com>, Bruce Momjian <bruce@momjian.us>, Heikki Linnakangas <hlinnakangas@vmware.com>, Simon Riggs <simon@2ndQuadrant.com>, Rajeev rastogi <rajeev.rastogi@huawei.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2014-01-08T23:24:34Z
Lists: pgsql-hackers 
On 01/08/2014 03:18 PM, Stephen Frost wrote:
> Do you really feel that a WARNING and increasing the docs to point
> out that three systems are necessary, particularly under the 'high
> availability' documentation and options, is a bad idea?  I fail to see
> how that does anything but clarify the use-case for our users.

I think the warning is dumb, and that the suggested documentation change
is insufficient.  If we're going to clarify things, then we need to have
a full-on several-page doc showing several examples of different sync
rep configurations and explaining their tradeoffs (including the
different sync modes and per-transaction sync).  Anything short of that
is just going to muddy the waters further.

Mind you, someone needs to take a machete to the HA section of the docs
anyway.

-- 
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com