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

From: dmc
Subject: Re: [Qemu-devel] RFE- snapshot data storage location configurable
Date: Sat, 11 Aug 2007 13:41:14 -0500
User-agent: Thunderbird (X11/20070719)

andrzej zaborowski wrote:
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.


Those little tidbits in the documentation ( -b flag for qemu-img create ) had completely gone under my radar. That definitely gets me everything I want.



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