From owner-freebsd-fs@FreeBSD.ORG  Tue Jul  8 22:40:28 2008
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
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 29964106567B
	for <freebsd-fs@freebsd.org>; Tue,  8 Jul 2008 22:40:28 +0000 (UTC)
	(envelope-from kris@FreeBSD.org)
Received: from weak.local (freefall.freebsd.org [IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id 682F98FC19;
	Tue,  8 Jul 2008 22:40:27 +0000 (UTC)
	(envelope-from kris@FreeBSD.org)
Message-ID: <4873ECE0.5090706@FreeBSD.org>
Date: Wed, 09 Jul 2008 00:40:32 +0200
From: Kris Kennaway <kris@FreeBSD.org>
User-Agent: Thunderbird 2.0.0.14 (Macintosh/20080421)
MIME-Version: 1.0
To: mike <mike503@gmail.com>
References: <bd9320b30807072315x105cf058tf9f952f0f5bb2a6a@mail.gmail.com>	<20080708100701.57031cda@twoflower.in.publishing.hu>	<bd9320b30807080131j5e0e02a4y3231d7bfa1738517@mail.gmail.com>	<4873C4FA.2020004@FreeBSD.org>
	<4873E068.8060305@psg.com>	<4873E0AE.6090305@psg.com>
	<bd9320b30807081531x4ba92c92lbcfcbeba059237af@mail.gmail.com>
In-Reply-To: <bd9320b30807081531x4ba92c92lbcfcbeba059237af@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-fs@freebsd.org
Subject: Re: Thinking of using ZFS/FBSD for a backup system
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 08 Jul 2008 22:40:28 -0000

mike wrote:
> On 7/8/08, Randy Bush <randy@psg.com> wrote:
> 
>> <sigh>.  first cuppa.  it's 4g
> 
> okay, so it sounds like from multiple people this could be doable and
> stable enough:
> 
> dual or quad-core current gen processor (amd64)
> 4g ram
> 4 or 6x 1tb disks
> freebsd 7.0-release
> 
> these tweaks to /boot/loader.conf:
> 
> vm.kmem_size=600M
> vm.kmem_size_max=600M
> vfs.zfs.prefetch_disable=1
> 
> right?

Might be enough kmem, if not, or if you want better performance from 
increased caching, increase as high as 1500M

Kris