From owner-freebsd-fs@FreeBSD.ORG Wed Jan 14 17:00:11 2015 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id B0682794 for ; Wed, 14 Jan 2015 17:00:11 +0000 (UTC) Received: from kirk-ext.obspm.fr (kirk-ext.obspm.fr [145.238.193.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.obspm.fr", Issuer "TERENA SSL CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4DFAFC16 for ; Wed, 14 Jan 2015 17:00:10 +0000 (UTC) Received: from pcjas.obspm.fr (pcjas.obspm.fr [145.238.184.233]) (authenticated bits=0) by kirk-ext.obspm.fr (8.14.4/8.14.4/DIO Observatoire de Paris - 15/04/10) with ESMTP id t0EH07LV020290 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 14 Jan 2015 18:00:08 +0100 Date: Wed, 14 Jan 2015 18:00:51 +0100 From: Albert Shih To: linda@kateley.com Subject: Re: How many ram... Message-ID: <20150114170051.GB97640@pcjas.obspm.fr> References: <20150113105240.GA33162@pcjas.obspm.fr> <54B528AC.9090901@kateley.com> <20150114163849.GA97640@pcjas.obspm.fr> <54B69E4A.9010402@kateley.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <54B69E4A.9010402@kateley.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.3.9 (kirk-ext.obspm.fr [145.238.193.20]); Wed, 14 Jan 2015 18:00:08 +0100 (CET) X-Virus-Scanned: clamav-milter 0.98.5 at kirk-ext.obspm.fr X-Virus-Status: Clean Cc: freebsd-fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Jan 2015 17:00:11 -0000 Le 14/01/2015 à 10:50:18-0600, Linda Kateley a écrit > I will say one more thing.. I also have a customer who uses zfs for > security camera storage. The cameras deliver 100's of k bytes per > minute... But they save the data for a very very very long time. That > kind of system would need very little ram(maybe 8GB) but lots and lots > of disk. Thanks you very much. May I ask you something (feel free to not answer of course ). I saw on your > >> 32GB ram. http://kateleyco.com/?p=815 you have install I quote «hey will have 252 4TB drives in 6 45-drive chassis with multiple controllers» do you have any idea how many pool they have ? how many disk they put in one raid ? how many raid they put in one pool ? Actually I've one server a very big pool (I known some tell me it's too big) with 72 disks in 6 raidz2. Thanks. Regards. JAS -- Albert SHIH DIO bâtiment 15 Observatoire de Paris 5 Place Jules Janssen 92195 Meudon Cedex France Téléphone : +33 1 45 07 76 26/+33 6 86 69 95 71 xmpp: jas@obspm.fr Heure local/Local time: mer 14 jan 2015 17:54:33 CET