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Date: Wed, 15 Sep 2010 16:12:13 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] Re: [RFC] qed: Add QEMU Enhanced Disk format
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	<20100915210123.GA5526@redhat.com>
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To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>, qemu-devel@nongnu.org

On 09/15/2010 04:01 PM, Michael S. Tsirkin wrote:
> On Mon, Sep 06, 2010 at 11:04:38AM +0100, Stefan Hajnoczi wrote:
>    
>> The format supports sparse disk images.  It does not rely on the host
>> filesystem holes feature, making it a good choice for sparse disk images
>> that need to be transferred over channels where holes are not supported.
>>      
> Are these so important? Do people really pass VM images around with
> http?

Absolutely.  Part of the problem is that there's an industry expectation 
that virtual machines are stored in images.

Even when you look at something like VMFS, which is a filesystem 
designed specifically for virtual machine images, you still use VMDKs on 
top of VMFS.

Regards,

Anthony Liguori

>    Maybe it's enough to teach scp about sparse files instead.
>
>