From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([208.118.235.92]:56048)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <stefanha@gmail.com>) id 1TbW9C-00036L-VL
	for qemu-devel@nongnu.org; Thu, 22 Nov 2012 07:44:52 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <stefanha@gmail.com>) id 1TbW98-0000iD-PS
	for qemu-devel@nongnu.org; Thu, 22 Nov 2012 07:44:50 -0500
Received: from mail-ee0-f45.google.com ([74.125.83.45]:41769)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <stefanha@gmail.com>) id 1TbW98-0000i8-HI
	for qemu-devel@nongnu.org; Thu, 22 Nov 2012 07:44:46 -0500
Received: by mail-ee0-f45.google.com with SMTP id d49so4838496eek.4
	for <qemu-devel@nongnu.org>; Thu, 22 Nov 2012 04:44:45 -0800 (PST)
Date: Thu, 22 Nov 2012 13:44:43 +0100
From: Stefan Hajnoczi <stefanha@gmail.com>
Message-ID: <20121122124443.GB17156@stefanha-thinkpad.redhat.com>
References: <1353488464-82756-1-git-send-email-dietmar@proxmox.com>
	<20121122111211.GH7598@stefanha-thinkpad.redhat.com>
	<24E144B8C0207547AD09C467A8259F755782E82B@lisa.maurer-it.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <24E144B8C0207547AD09C467A8259F755782E82B@lisa.maurer-it.com>
Subject: Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1)
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Dietmar Maurer <dietmar@proxmox.com>
Cc: "kwolf@redhat.com" <kwolf@redhat.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>

On Thu, Nov 22, 2012 at 11:26:21AM +0000, Dietmar Maurer wrote:
> > Did you look at the VMDK "Stream-Optimized Compressed" subformat?
> > 
> > http://www.vmware.com/support/developer/vddk/vmdk_50_technote.pdf?
> > src=vmdk
> > 
> > It is a stream of compressed "grains" (data).  They are out-of-order and each
> > grain comes with the virtual disk lba where the data should be visible to the
> > guest.
> > 
> 
> What kind of license is applied to that specification?

The document I linked came straight from Google Search and you don't
need to agree to anything to view it.  The document doesn't seem to
impose restrictions.  QEMU has supported the VMDK format and so have
other open source tools for a number of years.

For anything more specific you could search VMware's website and/or
check with a lawyer.

Stefan