Received: from localhost (unknown [200.46.204.183]) by mail.postgresql.org (Postfix) with ESMTP id E5062633A6D for ; Thu, 26 Feb 2009 01:11:44 -0400 (AST) Received: from mail.postgresql.org ([200.46.204.86]) by localhost (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024) with ESMTP id 35189-03 for ; Thu, 26 Feb 2009 01:11:40 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from mail2.Synechron.com (mail2.synechron.com [220.225.40.41]) by mail.postgresql.org (Postfix) with ESMTP id F357E633428 for ; Thu, 26 Feb 2009 01:11:38 -0400 (AST) Received: from [10.31.15.20] [10.31.15.20] by mail2.Synechron.com with ESMTP (SMTPD-9.10) id A4A2220284; Thu, 26 Feb 2009 10:42:02 +0530 Message-ID: <49A62481.3080204@synechron.com> Date: Thu, 26 Feb 2009 10:41:29 +0530 From: Ashish Karalkar User-Agent: Thunderbird 2.0.0.19 (Windows/20081209) MIME-Version: 1.0 To: Avi Blackmore CC: pgsql-admin@postgresql.org Subject: Re: Replicating between different Slony versions? References: <96E0A3B9-4860-4151-BEE2-1B5983D3434F@satshot.com> In-Reply-To: <96E0A3B9-4860-4151-BEE2-1B5983D3434F@satshot.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=4.33 tagged_above=0 required=5 tests=DNS_FROM_OPENWHOIS=2.431, FS_REPLICA=1.179, SARE_SPEC_REPLICA=0.72 X-Spam-Level: **** X-Archive-Number: 200902/223 X-Sequence-Number: 31444 Avi Blackmore wrote: > Hi folks, > > I'm working on migrating our database cluster from PostgreSQL 8.1 to > 8.3. I'm following the "dump and restore, then use Slony to > replicate" procedure, to minimize downtime. The problem is, the new > 2.0 version of Slony-I does not support anything prior to 8.3, so I > have to install different versions of Slony-I. > > My question is, is this even feasible? Or would I be better off > installing Slony-I 1.x on my 8.3 cluster, and then upgrading it after > the migration? > > I ask first because I am extremely skittish about experimenting with a > production database cluster. :-) > > Thanks, > -- > Avi Blackmore > Head Programmer/System Administrator > Agri ImaGIS Technologies, Inc. > > > > > Yes, You should go for Slony-I 1.x, Two different version of slony on master and slave will not work. With Regards --Ashish