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Re: [Qemu-devel] RFE- snapshot data storage location configurable

From: andrzej zaborowski
Subject: Re: [Qemu-devel] RFE- snapshot data storage location configurable
Date: Sat, 11 Aug 2007 18:16:33 +0200

On 01/08/07, dmc <address@hidden> wrote:
> I have a pretty ugly patch against qemu 0.8 which allows the location of data
> used with the -snapshot feature to be somewhere other than /var/tmp.  I have a
> use-case where I am creating many gigabytes of changes to disk in snapshot 
> mode.
>   When 0.9 came out, I looked, but it seemed less than trivial to update my
> patch, which was a pretty ugly hack to begin with.
> I don't suppose anybody else thinks this would be a useful feature?  Or at 
> least
> someone who can rattle off the top of their heads the sorts of things I should
> keep in mind while trying to put it together myself?
> A further extension, which I would like, but is also more complex to add, 
> would
> be the ability to specify -snapshot, _per device_.

I also thought that would be useful earlier but now qcow2 overlays
provide much better flexibility and don't litter the commandline
syntax. I think the currently available choice between -snapshot (for
the simplest possible use case) and qcow2 overlays (for anything more
complex) is a perfect balance for usability and there's no need to add
more switches.

Andrzej (away until mid-September(?))

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