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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