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Date: Wed, 14 Sep 2011 16:51:37 +0100
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From: Stefan Hajnoczi <stefanha@gmail.com>
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Subject: Re: [Qemu-devel] [PATCH] Add iSCSI support for QEMU
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To: Christoph Hellwig <hch@lst.de>
Cc: Kevin Wolf <kwolf@redhat.com>, stefanha@linux.vnet.ibm.com, qemu-devel@nongnu.org, fujita.tomonori@lab.ntt.co.jp, Orit Wasserman <owasserm@redhat.com>, RonnieSahlberg <ronniesahlberg@gmail.com>

On Wed, Sep 14, 2011 at 4:40 PM, Christoph Hellwig <hch@lst.de> wrote:
> On Wed, Sep 14, 2011 at 04:35:50PM +0100, Stefan Hajnoczi wrote:
>> I think the motivation for iSCSI target support in QEMU is exactly
>> what you mentioned - providing shared storage. =A0In migration scenarios
>> it is necessary temporarily make shared storage possible with an image
>> that is on a local disk.
>
> Why do we need to use the complex iSCSI protocol for that instead of
> simply using NBD?

I think NBD would be fine, especially with a flush command.

Stefan