Received: from localhost (unknown [200.46.204.183]) by postgresql.org (Postfix) with ESMTP id 3028664FD35 for ; Fri, 22 Aug 2008 12:17:19 -0300 (ADT) Received: from postgresql.org ([200.46.204.86]) by localhost (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024) with ESMTP id 52951-02 for ; Fri, 22 Aug 2008 12:17:14 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from lists.commandprompt.com (host-159.commandprompt.net [207.173.203.159]) by postgresql.org (Postfix) with ESMTP id 2DDA564FCCF for ; Fri, 22 Aug 2008 12:17:13 -0300 (ADT) Received: from commandprompt.com (CPE001b63afe888-CM001adea9c5a6.cpe.net.cable.rogers.com [99.236.211.160]) (authenticated bits=0) by lists.commandprompt.com (8.13.8/8.13.8) with ESMTP id m7MFK9Hu032431 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 22 Aug 2008 08:20:12 -0700 Date: Fri, 22 Aug 2008 11:17:09 -0400 From: Andrew Sullivan To: pgsql-admin@postgresql.org Subject: Re: Pg/CyberCluster test results Message-ID: <20080822151708.GE4131@commandprompt.com> Mail-Followup-To: Andrew Sullivan , pgsql-admin@postgresql.org References: <767392.31997.qm@web37902.mail.mud.yahoo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <767392.31997.qm@web37902.mail.mud.yahoo.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0 (lists.commandprompt.com [207.173.203.159]); Fri, 22 Aug 2008 08:20:13 -0700 (PDT) X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0 tagged_above=0 required=5 tests=none X-Spam-Level: X-Archive-Number: 200808/123 X-Sequence-Number: 29968 On Fri, Aug 22, 2008 at 06:33:50AM -0700, CG wrote: > cluster, and I'm finidng that it is REALLY easy for the two > back-ends to get out of sync with each other. When I investigated that product, I came to the conclusion that it's in the family of replication by query-dispatch. Everything in that family has this problem, and it's a fundamental limitation of the approach. A -- Andrew Sullivan ajs@commandprompt.com +1 503 667 4564 x104 http://www.commandprompt.com/