X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id 35690D95AA for ; Sun, 25 Sep 2005 13:08:41 -0300 (ADT) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 67893-07 for ; Sun, 25 Sep 2005 16:08:35 +0000 (GMT) Received: from boutiquenumerique.com (boutiquenumerique.com [82.67.9.10]) by svr1.postgresql.org (Postfix) with ESMTP id 95654D905E for ; Sun, 25 Sep 2005 13:08:31 -0300 (ADT) Received: (qmail 27396 invoked from network); 25 Sep 2005 18:09:16 +0200 Received: from unknown (HELO localhost) (boutiquenumerique-lists@192.168.0.4) by boutiquenumerique.com with SMTP; 25 Sep 2005 18:09:16 +0200 To: "Joshua D. Drake" , "Dave Cramer" Cc: "Michael Ben-Nes" , pgsql-performance@postgresql.org Subject: Re: Advice on RAID card References: <43367937.40809@canaan.co.il> <4336C57B.6090800@commandprompt.com> Message-ID: Date: Sun, 25 Sep 2005 18:08:27 +0200 From: PFC Organization: =?iso-8859-15?Q?La_Boutique_Num=E9rique?= Content-Type: text/plain; format=flowed; delsp=yes; charset=iso-8859-15 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit In-Reply-To: <4336C57B.6090800@commandprompt.com> User-Agent: Opera M2/8.0 (Linux, build 1095) X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.006 required=5 tests=[AWL=0.006] X-Spam-Level: X-Archive-Number: 200509/334 X-Sequence-Number: 14642 > The common explanation is that CPUs are so fast now that it doesn't make > a difference. > From my experience software raid works very, very well. However I have > never put > software raid on anything that is very heavily loaded. Even for RAID5 ? it uses a bit more CPU for the parity calculations. An advantage of software raid, is that if the RAID card dies, you have to buy the same one ; whether I think that you can transfer a bunch of software RAID5 disks to another machine if the machine they're in dies...