[one-users] qcow2: empty datablock image creation with preallocation

[Jaime Melis]

Hi Lorenzo,

not out of the box. You will need to manually modify the DS drivers. You
will need to modify:
https://github.com/OpenNebula/one/blob/release-4.4/src/datastore_mad/remotes/fs/mkfs

And replace the 'dd' command with your own.

I would probably do something like: https://gist.github.com/jmelis/7768171
(I haven't tested it, so it probably has bugs. You also need to write the
actual command)

Let me know if you need any further advice.

Cheers,
Jaime


On Mon, Dec 2, 2013 at 6:29 PM, Lorenzo Faleschini <
lorenzo.faleschini at nordestsystems.com> wrote:

> Hi
>
> is it possible to create in sunstone (or via CLI) an empty-datablock qcow2
> with preallocation (-o preallocation=metadata).
>
> I need it to avoid the auto-grow overhead.
>
> for now I create the prealloc qcow2 image then I import it in one.
>
> is it posible to avoid this step?
> any suggestions or alternatives?
>
> thanks
>
> Lorenzo
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> Users at lists.opennebula.org
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>



-- 
Jaime Melis
C12G Labs - Flexible Enterprise Cloud Made Simple
http://www.c12g.com | jmelis at c12g.com

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