[Qemu-devel] Selective snapshots

[Qemu-devel] Selective snapshots

[Ottavio Caruso]

Hello,

I have hd, hdb and hdd running in snasphot mode.

Is it possible to have only hda in snapshot and have qemu writing to
hdb and hdd as usual?

If that is not implemented are there plans to introduce this feature?

Thank you

-- 
Ottavio Caruso
http://www.pledgebank.com/boycottvista

Re: [Qemu-devel] Selective snapshots

[Laurent Vivier]

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Le vendredi 21 décembre 2007 à 15:56 +0000, Ottavio Caruso a écrit :
> Hello,
> 
> I have hd, hdb and hdd running in snasphot mode.
> 
> Is it possible to have only hda in snapshot and have qemu writing to
> hdb and hdd as usual?

I think   you can use "qemu -drive file=my_file,index=0,snapshot=on -hdb
f2 -hdd f3"


> If that is not implemented are there plans to introduce this feature?

It has not been really tested.

Laurent
-- 
----------------- Laurent.Vivier@bull.net  ------------------
  "La perfection est atteinte non quand il ne reste rien à
ajouter mais quand il ne reste rien à enlever." Saint Exupéry

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Re: [Qemu-devel] Selective snapshots

[andrzej zaborowski]

On 21/12/2007, Laurent Vivier <Laurent.Vivier@bull.net> wrote:
> Le vendredi 21 décembre 2007 à 15:56 +0000, Ottavio Caruso a écrit :
> > Hello,
> >
> > I have hd, hdb and hdd running in snasphot mode.
> >
> > Is it possible to have only hda in snapshot and have qemu writing to
> > hdb and hdd as usual?
>
> I think   you can use "qemu -drive file=my_file,index=0,snapshot=on -hdb
> f2 -hdd f3"
>
> > If that is not implemented are there plans to introduce this feature?

Yup, try this, and if it doesn't work you can always use:

qemu-img create -b /dev/hda -f qcow2 my-hda-overlay
qemu -hda my-hda-overlay -hdb /dev/hdb -hdd /dev/hdd

so I think there are no plans for a yet another way to do the same thing.
Regards