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Re: [Qemu-devel] [RFC PATCH 0/2] Migration: support working on file:url


From: Dr. David Alan Gilbert
Subject: Re: [Qemu-devel] [RFC PATCH 0/2] Migration: support working on file:url
Date: Thu, 21 Jul 2016 18:41:23 +0100
User-agent: Mutt/1.6.2 (2016-07-01)

* Daniel P. Berrange (address@hidden) wrote:
> On Thu, Jul 21, 2016 at 01:05:58PM +0800, zhanghailiang wrote:
> > It is more simple to use file:url to migrate VM into file.
> > Besides, it will be used in memory snapshot.
> 
> NB, you can already migrate into a file
> 
>    "exec:/bin/cat > /path/to/file"
> 
> and likewise
> 
>   qemu -incoming "exec:/bin/cat /path/to/file"
> 
> This avoids the problem with POSIX I/O on plain files not actually
> supporting O_NONBLOCK in any sensible manner, which your file:
> suggestion suffers from.

Hmm that's a shame; I liked this idea as a nice simplification of the
exec: stuff.

Dave

> Regards,
> Daniel
> -- 
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--
Dr. David Alan Gilbert / address@hidden / Manchester, UK



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