Re: Core team statement on replication in PostgreSQL

From: David Fetter <david(at)fetter(dot)org>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: Peter Eisentraut <peter_e(at)gmx(dot)net>, pgsql-hackers(at)postgresql(dot)org, Bruce Momjian <bruce(at)momjian(dot)us>, Marko Kreen <markokr(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Subject: Re: Core team statement on replication in PostgreSQL
Date: 2008-05-29 21:02:08
Message-ID: 20080529210208.GD31478@fetter.org
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On Thu, May 29, 2008 at 01:55:42PM -0700, Josh Berkus wrote:
> David,
>
>>> I think the consensus in the core team was that having synchronous
>>> log shipping in 8.4 would already be a worthwhile feature by itself.
>>
>> If that was in fact the consensus of the core team,
>
> It is.
>
>> and what I've been seeing from several core members in this thread
>> makes that idea unclear, it's out of step with the stated goal of
>> the feature. Having some kind of half-way,
>> doesn't-actually-quite-work-out-of-the-box "replication" will make
>> things worse and not better.
>
> So, you've got a better implementation up your sleeve?

Nope.

> I really don't get where you're coming from on this. Frankly, your
> e-mails seem gauged to be merely disruptive without any intent of
> constructive input.

I'm sorry they've come across that way. That was not my intent.

> If you're opposed to working on replication in the core, then just
> say so. If you think that there's an easier way to develop M-S
> replication in the core than using WAL, then please present your
> solution.

I think having master-slave replication in the core using WAL is a
*great* thing to do, doable, a good path to go on, etc., and I think
it's worth holding up 8.4 until we have at least one actual
out-of-the-box version of same.

People have hinted that we might be able to get both a synchronous one
and an asynchronous one based on WAL, which would be even better. :)

Cheers,
David.
--
David Fetter <david(at)fetter(dot)org> http://fetter.org/
Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter
Skype: davidfetter XMPP: david(dot)fetter(at)gmail(dot)com

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