[Qemu-devel] savevm and loadvm function

[Qemu-devel] savevm and loadvm function

[Lee]

Hello List,

I am wondering about the backend operation of the 'savevm' and 'loadvm'
monitor commands.


I am familiar with the VMware Snapshot concept, which saves both the
current memory and disk states.

Does qemu save memory and disk states, or just memory states?

The reason I ask is I would like to save the state of my qemu machine,
install some test software, and then revert back to that saved state (for
both memory and disk).

Is this possible?



-- 
Lee
linuxtwidler@gmail.com

Re: [Qemu-devel] savevm and loadvm function

[Jim C. Brown]

On Tue, Feb 01, 2005 at 01:33:22PM -0600, Lee wrote:
> 
> Hello List,
> 
> Does qemu save memory and disk states, or just memory states?

Only memory.

> 
> The reason I ask is I would like to save the state of my qemu machine,
> install some test software, and then revert back to that saved state (for
> both memory and disk).
> 
> Is this possible?
> 

Yes, you just need to combine save/loadvm with the -snapshot option (which lets
you write changed to the disk in a separate file). Then if you wanna revert back,
you just remove the snapshot and load up the saved vm (assuming you do not commit
the snapshot back to the original disk).

> 
> 
> -- 
> Lee
> linuxtwidler@gmail.com
> 
> 
> 
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> 

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