From owner-freebsd-questions@FreeBSD.ORG Thu Oct 20 09:40:40 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C0B5B106564A for ; Thu, 20 Oct 2011 09:40:39 +0000 (UTC) (envelope-from fajar@fajar.net) Received: from mail-iy0-f182.google.com (mail-iy0-f182.google.com [209.85.210.182]) by mx1.freebsd.org (Postfix) with ESMTP id 57B328FC16 for ; Thu, 20 Oct 2011 09:40:38 +0000 (UTC) Received: by iaky10 with SMTP id y10so3930132iak.13 for ; Thu, 20 Oct 2011 02:40:38 -0700 (PDT) MIME-Version: 1.0 Received: by 10.43.50.201 with SMTP id vf9mr12403154icb.10.1319103638596; Thu, 20 Oct 2011 02:40:38 -0700 (PDT) Received: by 10.42.241.2 with HTTP; Thu, 20 Oct 2011 02:40:38 -0700 (PDT) In-Reply-To: <20111020093309.GA83424@pcjas.obspm.fr> References: <20111019141443.GQ4592@pcjas.obspm.fr> <20111020093309.GA83424@pcjas.obspm.fr> Date: Thu, 20 Oct 2011 16:40:38 +0700 Message-ID: From: "Fajar A. Nugraha" To: Albert Shih Content-Type: text/plain; charset=ISO-8859-1 Cc: zfs-discuss@opensolaris.org, freebsd-questions@freebsd.org Subject: Re: [zfs-discuss] ZFS on Dell with FreeBSD X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Oct 2011 09:40:40 -0000 On Thu, Oct 20, 2011 at 4:33 PM, Albert Shih wrote: >> > Any advise about the RAM I need on the server (actually one MD1200 so 12x2To disk) >> >> The more the better :) > > Well, my employer is not so rich. > > It's first time I'm going to use ZFS on FreeBSD on production (I use on my > laptop but that's mean nothing), so what's in your opinion the minimum ram > I need ? Is something like 48 Go is enough ? If you don't use dedup (recommended), should be more than enough. If you use dedup, search zfs-discuss archive for some calculation method posted. For comparison purposes, you could also look at Oracle's zfs storage appliance configuration: https://shop.oracle.com/pls/ostore/f?p=dstore:product:3479784507256153::NO:RP,6:P6_LPI,P6_PROD_HIER_ID:424445158091311922637762,114303924177622138569448 -- Fajar