Received: from localhost (uranus.hub.org [200.46.204.60]) by postgresql.org (Postfix) with ESMTP id 8925B9F94EA for ; Wed, 15 Nov 2006 15:45:53 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.60]) (amavisd-new, port 10024) with ESMTP id 61293-07 for ; Wed, 15 Nov 2006 15:45:53 -0400 (AST) X-Greylist: domain auto-whitelisted by SQLgrey- Received: from mail.gmx.net (mail.gmx.de [213.165.64.20]) by postgresql.org (Postfix) with SMTP id 9C3379F946B for ; Wed, 15 Nov 2006 15:45:52 -0400 (AST) Received: (qmail invoked by alias); 15 Nov 2006 19:45:51 -0000 Received: from dslb-084-063-027-024.pools.arcor-ip.net (EHLO colt.pezone.net) [84.63.27.24] by mail.gmx.net (mp018) with SMTP; 15 Nov 2006 20:45:51 +0100 X-Authenticated: #495269 From: Peter Eisentraut To: pgsql-docs@postgresql.org Subject: Re: [HACKERS] Replication documentation addition Date: Wed, 15 Nov 2006 20:45:48 +0100 User-Agent: KMail/1.9.5 Cc: Bruce Momjian , Jeff Frost , Chris Browne References: <200611142243.kAEMhZf02180@momjian.us> In-Reply-To: <200611142243.kAEMhZf02180@momjian.us> MIME-Version: 1.0 Content-Type: text/plain; charset="ansi_x3.4-1968" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200611152045.49186.peter_e@gmx.net> X-Y-GMX-Trusted: 0 X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200611/27 X-Sequence-Number: 3861 Bruce Momjian wrote: > Hmmm. Interesting. Does anyone else have details or an opinion on > this? The fact that there is something sitting above the servers > seems to be the defining issue of calling it query broadcast. Well, clustering is just a general term for putting several things, say, computers, together to a common cause. If you cluster a database system, you need some way to distribute the incoming requests across the machines, which you can either do on the network layer or on the application layer. Sequoia does the latter. But I don't see any "broadcasting" in there as a defining quality. -- Peter Eisentraut http://developer.postgresql.org/~petere/