From owner-freebsd-questions@FreeBSD.ORG  Thu Jun 12 18:14:18 2008
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
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 578321065672
	for <freebsd-questions@freebsd.org>;
	Thu, 12 Jun 2008 18:14:18 +0000 (UTC)
	(envelope-from forrie@forrie.com)
Received: from forrie.com (demon.dce.harvard.edu [140.247.198.85])
	by mx1.freebsd.org (Postfix) with ESMTP id 1FCDF8FC17
	for <freebsd-questions@freebsd.org>;
	Thu, 12 Jun 2008 18:14:17 +0000 (UTC)
	(envelope-from forrie@forrie.com)
X-Envelope-From: forrie@forrie.com
X-Envelope-To: <freebsd-questions@freebsd.org>
X-Originating-IP: 140.247.198.51
Received: from dhcp-103-0-47.de-dhcp.harvard.edu (dce-gw.harvard.edu
	[140.247.198.51]) (authenticated as=forrie@forrie.com bits=0)
	by forrie.com (envelope-from forrie@forrie.com) (8.14.3/8.14.2) with
	ESMTP id m5CHopc5061531
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO)
	for <freebsd-questions@freebsd.org>;
	Thu, 12 Jun 2008 13:50:56 -0400 (EDT)
Message-ID: <485161FB.2090806@forrie.com>
Date: Thu, 12 Jun 2008 13:50:51 -0400
From: Forrest Aldrich <forrie@forrie.com>
User-Agent: Thunderbird 2.0.0.15pre (Macintosh/20080612)
MIME-Version: 1.0
To: freebsd-questions@freebsd.org
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Virus-Scanned: ClamAV 0.93/7451/Thu Jun 12 09:28:58 2008 on mail.forrie.com
X-Virus-Status: Clean
Subject: ZFS mount points
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 12 Jun 2008 18:14:18 -0000

What precautions could I take to prevent users from writing to a portion 
of a ZFS mount point that might fill up the underlying filesystem that 
wouldn't impede writes to that ZFS mount point.  For example:

/foo/bar/volume

If some program accidentally started writing to /foo/bar, as far as I 
understand, it would end up filling / and not the zpool. 

I could re-do this so that /zpool1 was /foo to mitigate this - though 
I've already established production mounts pointing to /foo/bar/volume 
(which is actually zpool1/volume).  Would changing zpool1 to /dce create 
havoc, since I'm NFS exporting /foo/bar/volume.


Thanks.