Received: from maia.hub.org (maia-3.hub.org [200.46.204.243]) by mail.postgresql.org (Postfix) with ESMTP id 3EE446338A5 for ; Wed, 28 Apr 2010 15:27:35 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.243]) (amavisd-maia, port 10024) with ESMTP id 75079-08 for ; Wed, 28 Apr 2010 18:27:27 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail-pv0-f174.google.com (mail-pv0-f174.google.com [74.125.83.174]) by mail.postgresql.org (Postfix) with ESMTP id 4588A632D8D for ; Wed, 28 Apr 2010 15:27:28 -0300 (ADT) Received: by pvg2 with SMTP id 2so401756pvg.19 for ; Wed, 28 Apr 2010 11:27:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=clFT2LhsltyxPBnmmwvMeuOxL86WKU4s7fp9ywqkeLs=; b=k1C9pXItn0THMmcDH8EDLn4cfZ55bd/kfDl9ukwpET0JfX8dSO5ydGkrmca7OWS11T llQAquXgpWic/rYifsWMxbq17g5DtJ/fHwTcwoH/zkx/BoznLYuVwSr06/cq/RZRzgdF 2iEkLPsaANqOojqt/v8In7fpOjuxFliibYp/k= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=rYkIhlCA9oGEYz1lv6VyI6f5eOUejxTPEvCsDyNz8CLTdjAYmdnpGqH/bOC3vx48O7 1D8L7DW5YgsjUX51c8pqEZigQeRurlcasqMGIHMrTXpIKgz72FXfBji4CbnVGENqMQQ0 ysWkTdLuDRQ+p3BHAZmLZksLr/9n5EwGpdMjc= MIME-Version: 1.0 Received: by 10.141.3.14 with SMTP id f14mr4161271rvi.98.1272479246818; Wed, 28 Apr 2010 11:27:26 -0700 (PDT) Received: by 10.140.143.7 with HTTP; Wed, 28 Apr 2010 11:27:26 -0700 (PDT) Date: Wed, 28 Apr 2010 11:27:26 -0700 Message-ID: Subject: more 10K disks or less 15K disks From: Anj Adu To: pgsql-admin@postgresql.org Content-Type: text/plain; charset=ISO-8859-1 X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0.811 tagged_above=-10 required=5 tests=BAYES_50=0.8, FREEMAIL_FROM=0.001, T_TO_NO_BRKTS_FREEMAIL=0.01 X-Spam-Level: X-Archive-Number: 201004/337 X-Sequence-Number: 34431 I am faced with a hardware choice for a postgres data warehouse (extremely high volume inserts..over 200 million records a day) with a total storage of either 12 x 600G disks (15K) (the new Dell Poweredge C server) or 24 x 600G (10K disks) ALL direct attached storage. I am leaning toward the 24 disks as I expect the higher number of disks to provide overall better performance under high loads Does anyone have any experience with a mixed 10K / 15K DAS storage that you can share. Thank you Sriram