[ovirt-users] difference between thin/depentend and clone/dependent vm virtual machine

Michal Skrivanek michal.skrivanek at redhat.com
Thu Apr 17 10:33:22 UTC 2014


On Apr 16, 2014, at 16:41 , Tamer Lima <tamer.americo at gmail.com> wrote:

> 
> 
> Hello,
> 
> I created VMs by two ways : 
>  
> 1)  on tab virtual machines > new vm  > template (centos_65_64bits)
> 1.1 configuration : I do not select stateless checkbox
> 1.2 this process takes a 1h30 to create each machine. 
> 
> 2)  on tab pools > new vm  > template (centos_65_64bits)
> 2.1 default configuration : stateless
> 2.2 Here I created 3 virtual machines at once
> 2.3 this process takes only one minute 
> 
> On the tab virtual machines I can see all virtual machines. 
> Pooled machines have different icon image
> and description is different too:
> 
> machines generated from tab VM  are described as clone/dependent
> - clone is a phisical copy?
> machines generated from tab POOL are described as thin/independent
> - thin is a just a  reference to template vm ? what is phisical? any configuration file?

yeah, sort of.
just google thin provisioning in general:)


> 
> 
> In practice, what is the difference between these machines ?
> 
> 
> 
> 
> http://www.ovirt.org/Features/PrestartedVm
> "Today there are 2 types of Vm pools:
> 	• Manual - the Vm is supposed to be manually returned to the pool. In practice, this is not really entirely supported.
> 	• Automatic - once the user shuts down the Vm - it returns to the pool (stateless)."
> 
>  all vm created from pool  are stateless ?

the automatic pool, yes

Thanks,
michal

> 
> 
> thanks
> 
> 
> 
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