[ovirt-users] VM Deployment By Template

[Punit Dambiwal]

Hi Sven,

It's Ok...but still the drawback is if i have 100GB template and use clone
instead of thin....now if i want to create 10 VM with this template...it
will copy 1TB data...and the provisioning will take long time ??

Is there any other work around to make this copy partial or the ovirt just
copy the actual used data at the time VM deployment instead of the whole
virtual disk....

Otherwise it's very hard to use Ovirt as public cloud...because if every
time it copy the whole template...and simultaneous more then 10 process
running for the VM deployment all the process will stuck..

Another way i got is create the VM with 1GB virtual template and expand the
disk size after deployment...but the problem here is disk will expand...but
it will not done any changes in the existing partition table..that means
after expand disk you need to manual login in to server and make the
changes with the help of fdisk and lvm commands...

Seems Ovirt is not proposed for the public cloud ??

Thanks,
Punit




On Wed, Aug 27, 2014 at 3:38 PM, Sven Kieske <S.Kieske at mittwald.de> wrote:

> Hi,
>
> just to correct this, this is wrong:
>
> Am 27.08.2014 04:20, schrieb Darren Hart:
> > When you create your VM based on the template check in advanced options
> > – Resource allocation and see if the option there for template
> provisioning
> > is set to clone or to thin provision. Clone in your case I believe
> would create
> > a 40GB image file based on the template whereas thin provision will
> create
> > you a thin provisioned disk just using the same actual
> > data amount as the thin provisioned template.
>
> If you have a "thin" template and create a new vm using the option:
> "clone" what ovirt does is copy the thin template to a new disk.
> when you use "thin" ovirt does not create a new disk for the vm, instead
> the new vm shares the thin disk with the template (same file!)
> and creates another file just for the differences between template
> and vm, which accumulate over time.
>
> notice that you can not delete a template which has thin provisioned
> vms depending on it unless you delete all those vms.
>
> HTH
>
> --
> Mit freundlichen Grüßen / Regards
>
> Sven Kieske
>
> Systemadministrator
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