Received: from maia.hub.org (maia-5.hub.org [200.46.204.29]) by mail.postgresql.org (Postfix) with ESMTP id A14A91337BC8 for ; Fri, 28 Jan 2011 09:24:21 -0400 (AST) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.29]) (amavisd-maia, port 10024) with ESMTP id 95504-04 for ; Fri, 28 Jan 2011 13:24:22 +0000 (UTC) Received: from amadensor.com (amadensor.com [200.46.208.228]) by mail.postgresql.org (Postfix) with ESMTP id 3DE021337B84 for ; Fri, 28 Jan 2011 09:24:21 -0400 (AST) Received: from maia.hub.org (maia-5.hub.org [200.46.204.29]) by amadensor.com (Postfix) with ESMTP id 7F82918A6866 for ; Fri, 28 Jan 2011 13:24:20 +0000 (UTC) Received: from amadensor.com ([200.46.208.228]) by maia.hub.org (mx1.hub.org [200.46.204.29]) (amavisd-maia, port 10024) with ESMTP id 95258-04 for ; Fri, 28 Jan 2011 13:24:15 +0000 (UTC) Received: from [192.168.2.101] (unknown [76.76.81.70]) by amadensor.com (Postfix) with ESMTPA id 5652E18A47E3 for ; Fri, 28 Jan 2011 13:24:12 +0000 (UTC) Message-ID: <4D42C37B.80002@amadensor.com> Date: Fri, 28 Jan 2011 06:24:11 -0700 From: Grant Johnson User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.13) Gecko/20101208 Thunderbird/3.1.7 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: How to best use 32 15k.7 300GB drives? References: <4D41F92F.9030006@missouri.edu> <201101271611.18465@hal.medialogik.com> In-Reply-To: <201101271611.18465@hal.medialogik.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-2.9 tagged_above=-10 required=5 tests=ALL_TRUSTED=-1, BAYES_00=-1.9 X-Spam-Level: X-Archive-Number: 201101/312 X-Sequence-Number: 42099 > Putting the WAL on a second controller does help, if you're write-heavy. > > I tried separating indexes and data once on one server and didn't > really notice that it helped much. Managing the space was problematic. > I would suggest putting those together on a single RAID-10 of all the > 300GB drives (minus a spare). It will probably outperform separate > arrays most of the time, and be much easier to manage. > > -- > > I like to use RAID 1, and let LVM do the striping. That way I can add more drives later too.