Received: from maia.hub.org (maia-2.hub.org [200.46.204.251]) by mail.postgresql.org (Postfix) with ESMTP id E0AD2634702 for ; Wed, 28 Apr 2010 15:28:52 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.251]) (amavisd-maia, port 10024) with ESMTP id 82684-03 for ; Wed, 28 Apr 2010 18:28:45 +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 769C1634698 for ; Wed, 28 Apr 2010 15:28:45 -0300 (ADT) Received: by pvg2 with SMTP id 2so403075pvg.19 for ; Wed, 28 Apr 2010 11:28:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=se86lv7q0ArfyYTvRPEJC6GhjC33Pt5TlyN0L9fRCBg=; b=Z1RZkd94MfoVSgWVPMWzX0AnpGxit9uWvcLBvxAIwMHAs/X271E9KD9Fuk6rg2wTeW r4PGcr2+WlvmQpyN1g2E/zHhpH3N291GrOdcv2hC+LbckZ4EP9QgK+ruSXUcB7w6AXwM NNihM15q8Nqx5ct08/0aJup/aMjhU5H7Q4eb0= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; b=V8HWxGIJaBFFGA+NzWJjXT/YR+3gi5p9Smt1N5bwWEbDRP/wjzt5AkV/OXMjdMSjLk casLlMskNHNEpJV0SCIYknzOGT4DdF/7TGva5+DuGI8XNxJY51G/PWMkKs5BOrFHO2JW YKbTdUjJDtcKaiIc0qK0RB3f3R64oMGOljEd0= MIME-Version: 1.0 Received: by 10.140.255.11 with SMTP id c11mr8409437rvi.137.1272479324162; Wed, 28 Apr 2010 11:28:44 -0700 (PDT) Received: by 10.140.143.7 with HTTP; Wed, 28 Apr 2010 11:28:44 -0700 (PDT) In-Reply-To: References: Date: Wed, 28 Apr 2010 11:28:44 -0700 Message-ID: Subject: Re: more 10K disks or less 15K disks From: Anj Adu To: pgsql-admin@postgresql.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-1.889 tagged_above=-10 required=5 tests=BAYES_00=-1.9, FREEMAIL_FROM=0.001, T_TO_NO_BRKTS_FREEMAIL=0.01 X-Spam-Level: X-Archive-Number: 201004/338 X-Sequence-Number: 34432 I forgot to add that the 24 10K disks are 2.5 inch and the 12 15K disks are 3.5 inch On Wed, Apr 28, 2010 at 11:27 AM, Anj Adu wrote: > I am faced with a =A0hardware 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) =A0(the new Dell Poweredge C server) > > or > > 24 x 600G =A0(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 >