[Users] Thin Provisioning

Dafna Ron dron at redhat.com
Sun Feb 24 10:16:54 UTC 2013


that's good input, I will look at the guide.
thanks

On 02/21/2013 06:00 PM, Juan Jose wrote:
> 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 at redhat.com
> <mailto:dron at 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 at orion f1a6a2e7-38f1-4a7c-8f3b-efbca664d7aa]# du -h
>     2.5G    .
>     [root at orion f1a6a2e7-38f1-4a7c-8f3b-efbca664d7aa]# du -h
>     2.6G    .
>     [root at 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 at redhat.com
>     <mailto:dron at redhat.com>
>     > <mailto:dron at redhat.com <mailto:dron at 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 at ovirt.org <mailto:users at ovirt.org>
>     <mailto:users at ovirt.org <mailto:users at 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 at redhat.com <mailto:dron at redhat.com>
>     >     <mailto:dron at redhat.com <mailto:dron at redhat.com>>
>     >     > <mailto:dron at redhat.com <mailto:dron at redhat.com>
>     <mailto:dron at redhat.com <mailto:dron at 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 at redhat.com <mailto:dron at redhat.com>
>     <mailto:dron at redhat.com <mailto:dron at redhat.com>>
>     >     >     <mailto:dron at redhat.com <mailto:dron at redhat.com>
>     <mailto:dron at redhat.com <mailto:dron at redhat.com>>>
>     >     >     > <mailto:dron at redhat.com <mailto:dron at redhat.com>
>     <mailto:dron at redhat.com <mailto:dron at redhat.com>>
>     >     <mailto:dron at redhat.com <mailto:dron at redhat.com>
>     <mailto:dron at redhat.com <mailto:dron at 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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>     >     >     >
>     >     >     >
>     >     >     >     --
>     >     >     >     Dafna Ron
>     >     >     >     _______________________________________________
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>     >     >     >
>     >     >     >
>     >     >
>     >     >
>     >     >     --
>     >     >     Dafna Ron
>     >     >
>     >     >
>     >
>     >
>     >     --
>     >     Dafna Ron
>     >
>     >
>
>
>     --
>     Dafna Ron
>
>


-- 
Dafna Ron



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