From owner-freebsd-fs@FreeBSD.ORG Fri Dec 3 19:51:05 2010 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 4525C1065670 for ; Fri, 3 Dec 2010 19:51:05 +0000 (UTC) (envelope-from peter@pean.org) Received: from smtprelay-b11.telenor.se (smtprelay-b11.telenor.se [62.127.194.20]) by mx1.freebsd.org (Postfix) with ESMTP id F32798FC1D for ; Fri, 3 Dec 2010 19:51:04 +0000 (UTC) Received: from ipb2.telenor.se (ipb2.telenor.se [195.54.127.165]) by smtprelay-b11.telenor.se (Postfix) with ESMTP id B1ADECDCE for ; Fri, 3 Dec 2010 20:51:03 +0100 (CET) X-SENDER-IP: [85.225.7.221] X-LISTENER: [smtp.bredband.net] X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AlETALfY+ExV4QfdPGdsb2JhbAAHoz4BAQEBNcNshUgEims X-IronPort-AV: E=Sophos;i="4.59,294,1288566000"; d="scan'208";a="155411070" Received: from c-dd07e155.166-7-64736c14.cust.bredbandsbolaget.se (HELO [172.25.0.40]) ([85.225.7.221]) by ipb2.telenor.se with ESMTP; 03 Dec 2010 20:51:03 +0100 Mime-Version: 1.0 (Apple Message framework v1082) Content-Type: text/plain; charset=iso-8859-1 From: =?iso-8859-1?Q?Peter_Ankerst=E5l?= In-Reply-To: <4CF949B0.5060405@obsysa.net> Date: Fri, 3 Dec 2010 20:51:02 +0100 Content-Transfer-Encoding: quoted-printable Message-Id: References: <4CF017C8-9D3C-483D-B508-5BF70E32AA14@pean.org> <4CF949B0.5060405@obsysa.net> To: Bartosz Stec X-Mailer: Apple Mail (2.1082) Cc: freebsd-fs@freebsd.org Subject: Re: zfs snapshots. 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: Fri, 03 Dec 2010 19:51:05 -0000 > On 2010-12-03 20:40, Peter Ankerst=E5l wrote: >> Is there a way to take a snapshot without using space from the parent = filesystem? >>=20 >> -- >> Peter Ankerst=E5l >> peter@pean.org >> http://www.pean.org/ >>=20 > AFAIK snapshot doesn't take any space as long as filesystem hasn't = changed from the time when snapshot was taken. > For instance - If you take snapshot on filesystem and after that, 10MB = file is deleted, snapshot is using only 10MB space from (because it's = only difference between snapshot and actual filesystem). >=20 > -- > Bartosz Stec >=20 Yes, this is correct. But it still uses up 10MB from the parent = filesystem. This is a problem if you use both snapshots and quotas. (and = use alot of snapshots)=