Received: from localhost (maia-4.hub.org [200.46.204.183]) by postgresql.org (Postfix) with ESMTP id D8BA29FBFA1 for ; Wed, 11 Jul 2007 12:36:31 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024) with ESMTP id 87276-07 for ; Wed, 11 Jul 2007 12:36:27 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.5 Received: from main2.mycybernet.net (main2.mycybernet.net [209.222.63.140]) by postgresql.org (Postfix) with ESMTP id D4FAE9FB3F7 for ; Wed, 11 Jul 2007 12:36:28 -0300 (ADT) Received: from 227-54-222-209.mycybernet.net ([209.222.54.227] helo=phlogiston.dydns.org) by main2.mycybernet.net with esmtp (Exim 4.62) (envelope-from ) id 1I8eEs-00023i-7R for pgsql-performance@postgresql.org; Wed, 11 Jul 2007 11:36:26 -0400 Received: by phlogiston.dydns.org (Postfix, from userid 1000) id D872E4050; Wed, 11 Jul 2007 11:36:20 -0400 (EDT) Date: Wed, 11 Jul 2007 11:36:20 -0400 From: Andrew Sullivan To: pgsql-performance@postgresql.org Subject: Re: WALL on controller without battery? Message-ID: <20070711153620.GP1241@phlogiston.dyndns.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.9i X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200707/91 X-Sequence-Number: 25775 On Wed, Jul 11, 2007 at 10:48:04AM -0400, Francisco Reyes wrote: > The question is, would I be better off putting WAL on the second, OS, > controller or in the 8 port controller? Specially since the 2 port will not > have battery (3ware does not have 2 ports with battery). Put the WAL where the battery is. Even if it's slower (and I don't know whether it will be), I assume that having the right data more slowly is better than maybe not having the data at all, quickly. A -- Andrew Sullivan | ajs@crankycanuck.ca The plural of anecdote is not data. --Roger Brinner