From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (ext-mx03.extmail.prod.ext.phx2.redhat.com [10.5.110.7]) by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o6CLPbcj029153 for ; Mon, 12 Jul 2010 17:25:37 -0400 Received: from mail-wy0-f174.google.com (mail-wy0-f174.google.com [74.125.82.174]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o6CLPRTF021273 for ; Mon, 12 Jul 2010 17:25:28 -0400 Received: by wyf23 with SMTP id 23so4346407wyf.33 for ; Mon, 12 Jul 2010 14:25:26 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20100710155031.GA26290@agk-dp.fab.redhat.com> References: <1278722281.8612.37@raydesk1.bettercgi.com> <20100710155031.GA26290@agk-dp.fab.redhat.com> Date: Mon, 12 Jul 2010 17:25:26 -0400 Message-ID: From: Michael Closson Content-Type: multipart/alternative; boundary=00504502d0b92a874f048b376420 Subject: Re: [linux-lvm] efficiently copying snapshot data. 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: To: LVM general discussion and development --00504502d0b92a874f048b376420 Content-Type: text/plain; charset=ISO-8859-1 OK but can the two snapshots exist on different physical machines? On Sat, Jul 10, 2010 at 11:50 AM, Alasdair G Kergon wrote: > On Fri, Jul 09, 2010 at 09:01:02PM -0400, Stuart D. Gathman wrote: > > Copy to a regular LV on the target system, and then do some dmsetup > > and metadata magic to turn the LV (which is a copy of a COW table) into a > > snapshot of the master LV with the COW already populated. > > > I don't think such a utility exists. > > lvconvert -s does this, regardless of what the man page might lead you > to believe! > > Alasdair > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ > --00504502d0b92a874f048b376420 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable OK but can the two snapshots exist on different physical machines?

<= div class=3D"gmail_quote">On Sat, Jul 10, 2010 at 11:50 AM, Alasdair G Kerg= on <agk@redhat.com> wrote:
On Fri, Jul 09, 2010 at 0= 9:01:02PM -0400, Stuart D. Gathman wrote:
> Copy to a regular LV on the target system, and then do some dmsetup > and metadata magic to turn the LV (which is a copy of a COW table) int= o a
> snapshot of the master LV with the COW already populated.

> I don't think such a utility exists.

lvconvert -s =A0does this, regardless of what the man page might lead= you
to believe!

Alasdair

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