Received: from localhost (maia-3.hub.org [200.46.204.184]) by postgresql.org (Postfix) with ESMTP id AF94C9FBE70 for ; Wed, 11 Jul 2007 12:33:53 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.184]) (amavisd-maia, port 10024) with ESMTP id 15399-08 for ; Wed, 11 Jul 2007 12:33:43 -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 F03A09FBF80 for ; Wed, 11 Jul 2007 12:33:45 -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 1I8eCF-0001V7-AV for pgsql-performance@postgresql.org; Wed, 11 Jul 2007 11:33:43 -0400 Received: by phlogiston.dydns.org (Postfix, from userid 1000) id EFBB34050; Wed, 11 Jul 2007 11:33:37 -0400 (EDT) Date: Wed, 11 Jul 2007 11:33:37 -0400 From: Andrew Sullivan To: pgsql-performance@postgresql.org Subject: Re: best use of an EMC SAN Message-ID: <20070711153337.GO1241@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: 200707/89 X-Sequence-Number: 25773 On Wed, Jul 11, 2007 at 09:03:27AM -0400, Dave Cramer wrote: > Problem with dedicating the spindles to each array is that we end up > wasting space. Are the SAN's smart enough to do a better job if I > create one large metalun and cut it up ? In my experience, this largely depends on your SAN and its hard- and firm-ware, as well as its ability to interact with the OS. I think the best answer is "sometimes yes". A -- Andrew Sullivan | ajs@crankycanuck.ca However important originality may be in some fields, restraint and adherence to procedure emerge as the more significant virtues in a great many others. --Alain de Botton