From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx2.redhat.com (mx2.redhat.com [10.255.15.25]) by int-mx2.corp.redhat.com (8.13.1/8.13.1) with ESMTP id l1NHWSJ7022095 for ; Fri, 23 Feb 2007 12:32:28 -0500 Received: from mail.linbit.com (nudl.linbit.com [212.69.162.21]) by mx2.redhat.com (8.13.1/8.13.1) with ESMTP id l1NHWODL000935 for ; Fri, 23 Feb 2007 12:32:24 -0500 Received: from soda (unknown [86.59.100.100]) by mail.linbit.com (LINBIT Mail Daemon) with ESMTP id 1B9A92E084DA for ; Fri, 23 Feb 2007 18:32:18 +0100 (CET) Date: Fri, 23 Feb 2007 18:32:20 +0100 From: Lars Ellenberg Subject: Re: [linux-lvm] moving logical volumes to another system *remotely* - how? Message-ID: <20070223173220.GD9124@soda.linbit> References: <45DED477.8040809@wpkg.org> <20070223124452.GB22388@homer.panici.net> <45DF0F5B.6000506@wpkg.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <45DF0F5B.6000506@wpkg.org> Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-lvm@redhat.com / 2007-02-23 16:59:23 +0100 \ Tomasz Chmielewski: > paddy@panici.net schrieb: > >On Fri, Feb 23, 2007 at 12:48:07PM +0100, Tomasz Chmielewski wrote: > >>I have a server which stores several LVM-2 logical volumes. > >> > >>As this system is pretty loaded, I'd like to move some of the logical > >>volumes to another machine. It has to be done remotely, so I can't do it > >>as described in the LVM HOWTO (where one basically adds/replaces disks in one machine). > >> > >>My common sense tells me that I should: > >> > >>1. Unmount/not use the logical volumes on the source server > >>2. Make volumes of the same size on the target server > >>3. Copy it somehow over network > >> > >> > >>I'm not sure of 2 (make volumes of exactly the same size) > >check your PE size, otherwise does what it says on the tin. > > Hmm, how? I just want to move some (not all) logical volumes. > > I guess fdisk is a good idea? > > # fdisk -l /dev/LVM2/ocsi1 > > Disk /dev/LVM2/ocsi1: 3221 MB, 3221225472 bytes > > > 3221225472 / 1024 = 3145728 > > > lvcreate -L3145728k -n ocsi1 LVM2 > > Hmm, hopefully, it's the right size? how about: lvs --units k > >>and 3 (how to copy it all over network, if possible, using SSH only). > >netcat and dd over forwarded port > > Thanks for the idea. dd if=/dev/$vg/$lv bs=32M | buffer -S 10m -s 512k | gzip -1 | ssh -T $target -- \ "gunzip | buffer -s 512k | dd bs=32M of=/dev/$t_vg/$t_lv" -- : Lars Ellenberg Tel +43-1-8178292-55 : : LINBIT Information Technologies GmbH Fax +43-1-8178292-82 : : Vivenotgasse 48, A-1120 Vienna/Europe http://www.linbit.com :