From owner-freebsd-fs@FreeBSD.ORG Mon Jul 7 17:46:20 2008 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 2AF091065683 for ; Mon, 7 Jul 2008 17:46:20 +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 766318FC1D; Mon, 7 Jul 2008 17:46:19 +0000 (UTC) (envelope-from kris@FreeBSD.org) Message-ID: <4872566C.6000206@FreeBSD.org> Date: Mon, 07 Jul 2008 19:46:20 +0200 From: Kris Kennaway User-Agent: Thunderbird 2.0.0.14 (Macintosh/20080421) MIME-Version: 1.0 To: hartzell@alerce.com References: <18546.20476.590665.29995@almost.alerce.com> In-Reply-To: <18546.20476.590665.29995@almost.alerce.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-fs@freebsd.org Subject: Re: using zfs and unionfs together, does zfs need to be extended? 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, 07 Jul 2008 17:46:20 -0000 George Hartzell wrote: > I'd like to be able to set up a large-ish number of very similar > jails, with a minimum of fuss and take advantage of zfs' cool > features. I'd like to use unionfs to do this, but zfs' lack of > whiteout support seems to make it impossible. [jump to the bottom if > you want to skip the setup and get to the questions] > > It seems like the most popular way to set up jails these days uses > read-only nullfs mounts of a base system and symbolic links into a > read-write nullfs mount for each jail's specific stuff (etc, > /usr/local, etc...). The "ZFS way" is to just clone your jail filesystem into each jail instance. Kris