X-Original-To: pgsql-performance-postgresql.org@postgresql.org Received: from localhost (wm.hub.org [200.46.204.128]) by postgresql.org (Postfix) with ESMTP id E6B669FB1D3 for ; Tue, 8 Aug 2006 19:28:20 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.128]) (amavisd-new, port 10024) with ESMTP id 56418-03 for ; Tue, 8 Aug 2006 22:28:16 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey- Received: from lists.commandprompt.com (host-130.commandprompt.net [207.173.203.130]) by postgresql.org (Postfix) with ESMTP id B45499FA2EA for ; Tue, 8 Aug 2006 19:28:16 -0300 (ADT) Received: from [192.168.1.50] (or-67-76-146-141.sta.embarqhsd.net [67.76.146.141]) (authenticated bits=0) by lists.commandprompt.com (8.13.7/8.13.6) with ESMTP id k78MSHjO018842 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 8 Aug 2006 15:28:18 -0700 Message-ID: <44D90FFE.7010807@commandprompt.com> Date: Tue, 08 Aug 2006 15:28:14 -0700 From: "Joshua D. Drake" Organization: Command Prompt, Inc. User-Agent: Thunderbird 1.5.0.5 (X11/20060728) MIME-Version: 1.0 To: "Thomas F. O'Connell" CC: Kenji Morishige , pgsql-performance@postgresql.org Subject: Re: most bang for buck with ~ $20,000 References: <20060808204354.GN29379@juniper.net> <44D906E1.7010405@commandprompt.com> <9EE66C7F-0B04-4472-9EBD-CD567AC9EA1D@sitening.com> In-Reply-To: <9EE66C7F-0B04-4472-9EBD-CD567AC9EA1D@sitening.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV version 0.88.3, clamav-milter version 0.88.3 on projects.commandprompt.com X-Virus-Status: Clean X-Greylist: Sender succeded SMTP AUTH authentication, not delayed by milter-greylist-1.6 (lists.commandprompt.com [192.168.2.159]); Tue, 08 Aug 2006 15:28:18 -0700 (PDT) X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0.135 tagged_above=0 required=5 tests=FORGED_RCVD_HELO X-Spam-Level: X-Archive-Number: 200608/117 X-Sequence-Number: 20302 Thomas F. O'Connell wrote: > > On Aug 8, 2006, at 4:49 PM, Joshua D. Drake wrote: > >>> I am considering a setup such as this: >>> - At least dual cpu (possibly with 2 cores each) >>> - 4GB of RAM >>> - 2 disk RAID 1 array for root disk >>> - 4 disk RAID 1+0 array for PGDATA >>> - 2 disk RAID 1 array for pg_xlog >>> Does anyone know a vendor that might be able provide such setup? > > Wouldn't it be preferable to put WAL on a multi-disk RAID 10 if you had > the opportunity? This gives you the redundancy of RAID 1 but approaches > the performance of RAID 0, especially as you add disks to the array. In > benchmarking, I've seen consistent success with this approach. WALL is written in order so RAID 1 is usually fine. We also don't need journaling for WAL so the speed is even faster. Joshua D. Drake > > -- > Thomas F. O'Connell > Sitening, LLC > > http://www.sitening.com/ > 3004B Poston Avenue > Nashville, TN 37203-1314 > 615-469-5150 x802 > 615-469-5151 (fax) > > ---------------------------(end of broadcast)--------------------------- > TIP 4: Have you searched our list archives? > > http://archives.postgresql.org > -- === The PostgreSQL Company: Command Prompt, Inc. === Sales/Support: +1.503.667.4564 || 24x7/Emergency: +1.800.492.2240 Providing the most comprehensive PostgreSQL solutions since 1997 http://www.commandprompt.com/