[one-users] Persistent VM instance storage?

[Javier Fontan]

Hello,

I am not sure I understand your needs but you can have multiple images
in a VM. That way you can use one image to hold OS files and
configuration and other image for data. That data VM (where you can
read a write your results) can later be used in other VM's after you
shutdown the first VM.

Does it make sense?

Bye

On Thu, Aug 20, 2009 at 2:24 PM, Enis Afgan<afgane at gmail.com> wrote:
> But that means that the same VM image needs to be used consistently to have
> access to stored data, right? It is not possible to decouple the data from
> the VM image? For example, I start VM instance from image A, manipulate some
> data while the instance is alive and save it. Shut down that instance. Then
> I start an instance of VM image B and would like to access/mount data that
> was stored by having run instance A earlier.
>
> Thanks for the answer,
> Enis
>
> On Thu, Aug 20, 2009 at 6:26 AM, Javier Fontan <jfontan at fdi.ucm.es> wrote:
>>
>> Hello,
>>
>> If the images for persistent storage are located in a shared directory
>> exported to execution nodes you can simply specify its path and set
>> CLONE=no in the template file. That way the VM will have access to
>> that image and could be used after the VM is shutdown for other VM. If
>> you do not have a shared directory use CLONE=yes and SAVE=yes when
>> specifying that image so when the VM is shutdown the modified image is
>> copied back to $ONE_LOCATION/var/<vmid> in the frontend machine.
>>
>> Bye
>>
>>
>> On Tue, Aug 18, 2009 at 7:45 PM, Enis Afgan<afgane at gmail.com> wrote:
>> > Hey guy, long time no contact but here I am again... :)
>> >
>> > Anyway, I've recently started looking at OpenNebula and have not been
>> > able
>> > to find any documentation on persistent storage for VM instances?
>> > Something
>> > on the lines of Amazon's EBS where one can mount (multiple) virtual
>> > disks to
>> > a live instance and have data stored to that medium transcend life of
>> > the
>> > instance itself. Is this possible in OpenNebula?
>> > If not, are there any other provisions for persistent storage within VM
>> > instances? Are there any limitations within the model (e.g., Amazon's S3
>> > has
>> > 5GB single file limit).
>> >
>> > Thanks,
>> > Enis
>> >
>> > P.S. Anyone from the group coming to Cluster 2009?
>> >
>> > --
>> > ---------------------------------------------
>> > Enis Afgan, Ph.D.
>> > Department of Biology
>> > Emory University
>> >
>> > _______________________________________________
>> > Users mailing list
>> > Users at lists.opennebula.org
>> > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>> >
>> >
>>
>>
>>
>> --
>> Javier Fontan, Grid & Virtualization Technology Engineer/Researcher
>> DSA Research Group: http://dsa-research.org
>> Globus GridWay Metascheduler: http://www.GridWay.org
>> OpenNebula Virtual Infrastructure Engine: http://www.OpenNebula.org
>
>
>
> --
> ---------------------------------------------
> Enis Afgan, Ph.D.
> Department of Biology
> Emory University
> afgane at gmail.com
>



-- 
Javier Fontan, Grid & Virtualization Technology Engineer/Researcher
DSA Research Group: http://dsa-research.org
Globus GridWay Metascheduler: http://www.GridWay.org
OpenNebula Virtual Infrastructure Engine: http://www.OpenNebula.org