From owner-freebsd-fs@FreeBSD.ORG Mon Jul 11 07:41:44 2011 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id CEB39106566B for ; Mon, 11 Jul 2011 07:41:44 +0000 (UTC) (envelope-from peterjeremy@acm.org) Received: from mail15.syd.optusnet.com.au (mail15.syd.optusnet.com.au [211.29.132.196]) by mx1.freebsd.org (Postfix) with ESMTP id 452168FC18 for ; Mon, 11 Jul 2011 07:41:43 +0000 (UTC) Received: from server.vk2pj.dyndns.org (c220-239-116-103.belrs4.nsw.optusnet.com.au [220.239.116.103]) by mail15.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id p6B7ferA021049 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 11 Jul 2011 17:41:41 +1000 X-Bogosity: Ham, spamicity=0.000000 Received: from server.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by server.vk2pj.dyndns.org (8.14.4/8.14.4) with ESMTP id p6B7fdua078601 for ; Mon, 11 Jul 2011 17:41:39 +1000 (EST) (envelope-from peter@server.vk2pj.dyndns.org) Received: (from peter@localhost) by server.vk2pj.dyndns.org (8.14.4/8.14.4/Submit) id p6B7fd27078600 for freebsd-fs@freebsd.org; Mon, 11 Jul 2011 17:41:39 +1000 (EST) (envelope-from peter) Date: Mon, 11 Jul 2011 17:41:39 +1000 From: Peter Jeremy To: freebsd-fs@freebsd.org Message-ID: <20110711074139.GA77617@server.vk2pj.dyndns.org> References: <1309793921.2618.YahooMailRC@web120016.mail.ne1.yahoo.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="VbJkn9YxBvnuCH5J" Content-Disposition: inline In-Reply-To: X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.21 (2010-09-15) Subject: Re: Are thumpers still interesting in 2011 ? (raidz3 on x4500 @ 3.0gbps ...) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Jul 2011 07:41:44 -0000 --VbJkn9YxBvnuCH5J Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2011-Jul-05 14:20:39 +0200, Ivan Voras wrote: >It's a bit outdated, but here are the plans for a do-it-yourself=20 >slightly scaled down Thumper-like server: > >http://blog.backblaze.com/2009/09/01/petabytes-on-a-budget-how-to-build-ch= eap-cloud-storage/ Note that that article doesn't address acoustic and vibration issues. There's plenty of evidence that disks are very sensitive to vibration - even at low levels, it will adversely impact performance. Designing a box to provide optimal throughput with 48 disks is going to need a lot more attention to vibration isolation and damping than is shown. --=20 Peter Jeremy --VbJkn9YxBvnuCH5J Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (FreeBSD) iEYEARECAAYFAk4aqTMACgkQ/opHv/APuIfM9gCfT+ycQsfTKxThYDvMNywqK2zx V0AAnRp/Th26qAPyXe96F6yOXAeZ+Tuw =1ZNm -----END PGP SIGNATURE----- --VbJkn9YxBvnuCH5J--