Received: from localhost (unknown [200.46.204.183]) by postgresql.org (Postfix) with ESMTP id 9BE68650DBC for ; Mon, 30 Jun 2008 12:59:38 -0300 (ADT) Received: from postgresql.org ([200.46.204.86]) by localhost (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024) with ESMTP id 13963-03 for ; Mon, 30 Jun 2008 12:59:34 -0300 (ADT) X-Greylist: delayed 00:18:29.504146 by SQLgrey-1.7.6 Received: from mailsrv1.zmi.at (mailsrv1.zmi.at [212.69.162.198]) by postgresql.org (Postfix) with ESMTP id 407A9650CF5 for ; Mon, 30 Jun 2008 12:59:35 -0300 (ADT) Received: from mailsrv.i.zmi.at (h081217054243.dyn.cm.kabsi.at [81.217.54.243]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mailsrv.i.zmi.at", Issuer "mailsrv.i.zmi.at" (not verified)) by mailsrv1.zmi.at (Postfix) with ESMTP id D55B1D1B for ; Mon, 30 Jun 2008 17:41:12 +0200 (CEST) Received: from saturn.i.zmi.at (saturn.i.zmi.at [10.0.0.2]) by mailsrv.i.zmi.at (Postfix) with ESMTP id 3577B13953 for ; Mon, 30 Jun 2008 17:21:34 +0200 (CEST) From: Michael Monnerie Organization: it-management http://it-management.at To: pgsql-admin@postgresql.org Subject: Re: Recommended RAID for Postgres Date: Mon, 30 Jun 2008 17:40:54 +0200 User-Agent: KMail/1.9.6 (enterprise 20070904.708012) References: <46F5921DF52F6E40860287B30CADADC79463A3@EROS.nexus-ag.com> <20080630125231.GB24497@easy2.in-chemnitz.de> <46F5921DF52F6E40860287B30CADADC79463C4@EROS.nexus-ag.com> In-Reply-To: <46F5921DF52F6E40860287B30CADADC79463C4@EROS.nexus-ag.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart6336834.1MMNKJoSpP"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200806301740.55080@zmi.at> X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0.011 tagged_above=0 required=5 tests=AWL=0.011 X-Spam-Level: X-Archive-Number: 200806/249 X-Sequence-Number: 29587 --nextPart6336834.1MMNKJoSpP Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Montag, 30. Juni 2008 Thomas Br=E4utigam wrote: > Why avoid RAID5? RAID5 has very poor WRITE performance compared to RAID10, while READ is=20 nearly the same speed. If you do not have a "branded" server like HP or IBM, I can recommend=20 the Areca RAID controllers http://www.areca.com.tw/ their driver is=20 included in Linux kernel, and they are pretty damn fast. Change the=20 onboard RAM to 2GB, with the SAS 16 or 24 port controller this is the=20 way to have fun. On their website is also benchmarks about different RAID levels, so you=20 can compare them. mfg zmi =2D-=20 // Michael Monnerie, Ing.BSc ----- http://it-management.at // Tel: 0660 / 415 65 31 .network.your.ideas. // PGP Key: "curl -s http://zmi.at/zmi.asc | gpg --import" // Fingerprint: AC19 F9D5 36ED CD8A EF38 500E CE14 91F7 1C12 09B4 // Keyserver: www.keyserver.net Key-ID: 1C1209B4 --nextPart6336834.1MMNKJoSpP Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4-svn0 (GNU/Linux) iD8DBQBIaP6HzhSR9xwSCbQRAuxJAKDmpWlJ4bxodLtk1vuNHY6KVhMC9QCeIqK2 3lDlr5ojn/JW7doMb7UeIv0= =qA+U -----END PGP SIGNATURE----- --nextPart6336834.1MMNKJoSpP--