Many thanks for your information Dafna. Quick Start Guide doesn't explain nothing about this and I have follewed it to create the two VM, Fedora 17 and Windows 7, that I'm using to create Templates and when I have arrived to this part I have found this problem. Now I know what is the procedure

Juanjo.

On Thu, Feb 21, 2013 at 2:25 PM, Dafna Ron <dron@redhat.com> wrote:
Hi Juan,

I see what the issue is and it's actually by design.
The template you created has a Preallocated image.
in NFS, to make a preallocated image we actually write to the disk to
make it preallocated.

as you can see, I created a vm with preallocated disk in NFS and if I
run DU during the creation of the image you can see the size go up:

2.4G    .
[root@orion f1a6a2e7-38f1-4a7c-8f3b-efbca664d7aa]# du -h
2.5G    .
[root@orion f1a6a2e7-38f1-4a7c-8f3b-efbca664d7aa]# du -h
2.6G    .
[root@orion f1a6a2e7-38f1-4a7c-8f3b-efbca664d7aa]#


so in NFS storage, if your template is preallocated you cannot create a
thin provision copy vm (distinguishing between the actual data and
previously zeroed will be complicated).
you can create a snapshot of that image which will be thin provision but
it will be linked to the template.
or you can create a thin provision template and than create a thin
provision vm or preallocated vm.

Dafna



On 02/21/2013 01:56 PM, Juan Jose wrote:
> Hello Dafna,
>
> I hope that this two screenshots provides this information.
>
> On Thu, Feb 21, 2013 at 11:38 AM, Dafna Ron <dron@redhat.com
> <mailto:dron@redhat.com>> wrote:
>
>     Can you please tell me what disk type you have on the template and
>     send
>     a screen shot of the Resource Allocation tab to the
>     users@ovirt.org <mailto:users@ovirt.org> list?
>
>
>     On 02/21/2013 09:43 AM, Juan Jose wrote:
>     > Hello Dafna,
>     >
>     > Yes, I have already selected the Clone radio button as the Start
>     Guide
>     > shows and the Thin Provision doesn't appears.
>     >
>     >
>     > On Wed, Feb 20, 2013 at 5:50 PM, Dafna Ron <dron@redhat.com
>     <mailto:dron@redhat.com>
>     > <mailto:dron@redhat.com <mailto:dron@redhat.com>>> wrote:
>     >
>     >     ok. so you have 1 NFS data domain which has a template on it
>     and when
>     >     you are trying to create a new vm you only have preallocated
>     disk
>     >     type.
>     >
>     >     when you open the new vm dialogue, after you select the
>     template,
>     >     in the
>     >     Resource allocation tab you need to select the clone radio
>     button (its
>     >     near the Template Provisioning).
>     >     once you do that, the allocation policy scroll will become
>     active and
>     >     you will be able to select thin or preallocated.
>     >
>     >     let me know if after you select the clone you still only have
>     >     preallocated.
>     >
>     >
>     >
>     >     On 02/20/2013 06:09 PM, Juan Jose wrote:
>     >     > Hello Dafna,
>     >     >
>     >     > Are you want to say one NFS domain?, I have one for VM
>     aand one
>     >     isos.
>     >     >
>     >     >
>     >     > On Wed, Feb 20, 2013 at 4:46 PM, Dafna Ron
>     <dron@redhat.com <mailto:dron@redhat.com>
>     >     <mailto:dron@redhat.com <mailto:dron@redhat.com>>
>     >     > <mailto:dron@redhat.com <mailto:dron@redhat.com>
>     <mailto:dron@redhat.com <mailto:dron@redhat.com>>>> wrote:
>     >     >
>     >     >     do you have more than one domain?
>     >     >
>     >     >
>     >     >     On 02/20/2013 05:38 PM, Juan Jose wrote:
>     >     >     > Hello everybody,
>     >     >     >
>     >     >     > I'm following the Quick Start Guide to clone a
>     machine from a
>     >     >     Template
>     >     >     > that it's already created. As thi guide says it's
>     necessary to
>     >     >     select
>     >     >     > in Allocation tab from Resource Allocation, Thin
>     >     Provision. When
>     >     >     I try
>     >     >     > to do this and down the select field it doesn't
>     appear this
>     >     >     option, I
>     >     >     > only can see Preallocated. I have oVirt engine 3.1. Can
>     >     somebody
>     >     >     give
>     >     >     > some light why I haven't this option in my webadmin?
>     >     >     >
>     >     >     > Many thanks in avanced,
>     >     >     >
>     >     >     > Juanjo.
>     >     >     >
>     >     >     >
>     >     >     > _______________________________________________
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>     >     >     > Users@ovirt.org <mailto:Users@ovirt.org>
>     <mailto:Users@ovirt.org <mailto:Users@ovirt.org>>
>     >     <mailto:Users@ovirt.org <mailto:Users@ovirt.org>
>     <mailto:Users@ovirt.org <mailto:Users@ovirt.org>>>
>     >     >     > http://lists.ovirt.org/mailman/listinfo/users
>     >     >
>     >     >
>     >     >     --
>     >     >     Dafna Ron
>     >     >     _______________________________________________
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>     >     >     Users@ovirt.org <mailto:Users@ovirt.org>
>     <mailto:Users@ovirt.org <mailto:Users@ovirt.org>>
>     >     <mailto:Users@ovirt.org <mailto:Users@ovirt.org>
>     <mailto:Users@ovirt.org <mailto:Users@ovirt.org>>>
>     >     >     http://lists.ovirt.org/mailman/listinfo/users
>     >     >
>     >     >
>     >
>     >
>     >     --
>     >     Dafna Ron
>     >
>     >
>
>
>     --
>     Dafna Ron
>
>


--
Dafna Ron