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

[Tamer Lima]

hi,  thanks for reply

I am investigating what is and how "thin virtualization" works

Do you know if  HADOOP is indicated to work under "thin" environment ?
On Hadoop I will put large workloads  and this  thin virtualization
utilizes more resources than exists (shareable environment)
that is,
if I have a real physical necessity of 500gb for each hadoop host  and my
Thin Virtualization has  2TB on NFS,  I can have only 4 virtual machines
(500GB each), or less.

For this case I believe clone virtual machine is the right choice. But in
my environment it takes 1h30m to build one cloned virtual machine.



Am I correct ?





On Thu, Apr 17, 2014 at 7:33 AM, Michal Skrivanek <
michal.skrivanek at redhat.com> wrote:

>
> 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
> >
> >
> >
> > _______________________________________________
> > Users mailing list
> > Users at ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
>
>
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