From owner-freebsd-fs@FreeBSD.ORG Fri Dec 3 21:19:07 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 9E0B9106566B for ; Fri, 3 Dec 2010 21:19:07 +0000 (UTC) (envelope-from brooks@lor.one-eyed-alien.net) Received: from lor.one-eyed-alien.net (lor.one-eyed-alien.net [69.66.77.232]) by mx1.freebsd.org (Postfix) with ESMTP id 542918FC2D for ; Fri, 3 Dec 2010 21:19:07 +0000 (UTC) Received: from lor.one-eyed-alien.net (localhost [127.0.0.1]) by lor.one-eyed-alien.net (8.14.3/8.14.3) with ESMTP id oB3L0kNW009649; Fri, 3 Dec 2010 15:00:46 -0600 (CST) (envelope-from brooks@lor.one-eyed-alien.net) Received: (from brooks@localhost) by lor.one-eyed-alien.net (8.14.3/8.14.3/Submit) id oB3L0j2c009648; Fri, 3 Dec 2010 15:00:45 -0600 (CST) (envelope-from brooks) Date: Fri, 3 Dec 2010 15:00:45 -0600 From: Brooks Davis To: Peter Ankerst?l Message-ID: <20101203210045.GB7429@lor.one-eyed-alien.net> References: <4CF017C8-9D3C-483D-B508-5BF70E32AA14@pean.org> <4CF949B0.5060405@obsysa.net> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="IrhDeMKUP4DT/M7F" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (lor.one-eyed-alien.net [127.0.0.1]); Fri, 03 Dec 2010 15:00:47 -0600 (CST) Cc: freebsd-fs@freebsd.org, Bartosz Stec 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 21:19:07 -0000 --IrhDeMKUP4DT/M7F Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Dec 03, 2010 at 08:51:02PM +0100, Peter Ankerst?l wrote: >=20 >=20 > > On 2010-12-03 20:40, Peter Ankerst?l wrote: > >> Is there a way to take a snapshot without using space from the parent = filesystem? > >>=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). > > 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) You many be able to use the refquota attribute instead of quota unless you're trying to place quotas on filesystem hiearchies. -- Brooks --IrhDeMKUP4DT/M7F Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iD8DBQFM+Vp9XY6L6fI4GtQRAheCAJ9qYdVMCpFlVCtMWmsutavK6749RwCfZfaS Rd8ldPXj+uL8wBm5Xf+sP2k= =4fLO -----END PGP SIGNATURE----- --IrhDeMKUP4DT/M7F--