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Hello,

For the first point, yes, you need the free space disk necessary to 
snapshot on the compute node. The process of snapshotting is in fact a 
qemu-img creation, you can easily see the process details on the compute 
node when you trigger a snapshot.

However for the second point I don't remember right now where it's 
placed before being transfered, you'll find out easily with the qemu-img 
parameters.

Hope it helps,

Le 23/04/2015 22:00, Ross Lillie a écrit :
> Hi!
>
> I'm just trying to clarify my understanding of the image snapshot 
> creation process.
>
> When snapshotting a running instance, the compute node must have 
> sufficient disk space for the image to be created prior to uploading 
> to Glance. Is this correct?
>
> Also, by default, during the snapshot creation on the compute node, 
> where is the snapshot image being written? /tmp? /var/nova/instances?
>
> Thanks for your help!
>
> Regards,
> Ross
>
>
> -- 
> Ross Lillie
> Application Software & Architecture Group
>
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> <https://www.google.com/calendar/embed?src=ross.lillie%40motorolasolutions.com&ctz=America/Chicago>
>
>
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