From mboxrd@z Thu Jan 1 00:00:00 1970 From: Soren Hansen Subject: Re: KVM backup and snapshots Date: Thu, 7 Aug 2008 17:15:23 +0200 Message-ID: <20080807151523.GA10783@ralph.linux2go.dk> References: <90eb1dc70808070733ie9542d1t4de0f9ad0cc14df@mail.gmail.com> <90eb1dc70808070757q7c31793bjeb305c8fb662ca6e@mail.gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="u3/rZRmxL6MmkK24" To: kvm@vger.kernel.org Return-path: Received: from atlas.linux2go.dk ([88.198.22.52]:41785 "EHLO atlas.linux2go.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752032AbYHGPPZ (ORCPT ); Thu, 7 Aug 2008 11:15:25 -0400 Received: from localhost (0107ds1-abv.0.fullrate.dk [90.185.52.147]) by atlas.linux2go.dk (Postfix) with ESMTP id AB2A240A931 for ; Thu, 7 Aug 2008 17:15:24 +0200 (CEST) Content-Disposition: inline In-Reply-To: <90eb1dc70808070757q7c31793bjeb305c8fb662ca6e@mail.gmail.com> Sender: kvm-owner@vger.kernel.org List-ID: --u3/rZRmxL6MmkK24 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 07, 2008 at 09:57:17AM -0500, Javier Guerra wrote: >> I thought about using 1 lvm volume, but splitting that into slices >> somehow, which can then be used as kvm disks - maybe by implementing >> a very simple filesystem (block mapper). The problem with this >> approach is that adding/deleting a new disk would mean to grow/shrink >> an lvm partition, which is slow. > you could run LVM in the VM. be careful about block scanning tools on > Dom0, could mistake the LVM structure inside a LV for the 'outer' one. > (reiserfsck has this problem with image files) Yes, I noticed that this is not common knowledge. Besides, it's something that can't hurt being repeated every so often: * Don't ever, ever store images of reiser file systems on reiserfs!! * Theodore T'so explained it rather well: http://linuxmafia.com/faq/Filesystems/reiserfs.html --=20 Soren Hansen |=20 Virtualisation specialist | Ubuntu Server Team Canonical Ltd. | http://www.ubuntu.com/ --u3/rZRmxL6MmkK24 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iJwEAQECAAYFAkibEYsACgkQo+Mz6+DAzGzItAP8Dkc2iTbLVlapAQtR1aHo731g /J/du83RpARQTqlxgqL57kE5FlqkBpH5NmWNMutvh+HxuzrdytUNJQ1ikNuQSznD 93ubGQo1rs0Fg/cC7bmSt86aW6mNo6CnqYADyBdUKFKeRtGNDMFWGFlHqKXspfoa U/nj/k7AYqjreamSsbc= =surE -----END PGP SIGNATURE----- --u3/rZRmxL6MmkK24--