[one-users] Open Nebula, NFS and requirements of disk space?

[Steffen Neumann]

Ah,

now I get the idea: the golden images are on the headnode, 
exported to the worker nodes via NFS, and then they're 
cloned onto the local worker disk drives with 36GB. 
Did I get that right ?

Now, speed-wise the only benefit would be if NFS 
gets the image to the worker nodes faster over the network than 
copying via ssh / scp. Which, I think, is only 
a few percent, if at all. The images definitely 
need to be copied fully, because each node needs
its own copy. If all used the same image, the filesystem 
would go up in smoke if two nodes write to it 
without knowing about each other...

So yes, it might be possible, but IMHO does not make 
a lot of sense. 

Or did I misunderstand anything ?

Yours,
Steffen


On Mon, 2011-05-16 at 15:25 +0200, Anders Branderud wrote:
> He thinks it is a faster solution - i.e. with NFS all of the image
> doesn't necessarily need to be copied from the front end to the worker
> node, but only the parts that the user needs. Thus it can be more
> efficient.
> "SSH Non shared" requires the image file to be cloned to all VM's,
> which in many cases is unnecessary and isn't efficient.
> 
> 
> Regards, Anders
> 
> 2011/5/16 Steffen Neumann <sneumann at ipb-halle.de>
>         On Mon, 2011-05-16 at 13:48 +0200, Anders Branderud wrote:
>         > Hello!
>         > Thanks Steffen!
>         >
>         > Yes, I am aware of the "Non-Shared - SSH"-solution.
>         > However, the person that I am doing my thesis for, want it
>         to be done
>         > with NFS.
>         
>         What does he want on NFS ?
>         
>         Gruss,
>         
>         Steffen
>         
>         --
>         IPB Halle                    AG Massenspektrometrie &
>         Bioinformatik
>         Dr. Steffen Neumann          http://www.IPB-Halle.DE
>         Weinberg 3                   http://msbi.bic-gh.de
>         06120 Halle                  Tel. +49 (0) 345 5582 - 1470
>                                          +49 (0) 345 5582 - 0
>         sneumann(at)IPB-Halle.DE     Fax. +49 (0) 345 5582 - 1409
>         
>         
>         
> 
> 
> 
> -- 
> Kind Regards, Anders Branderud
> 
> [Personal blog] bloganders.blogspot.com  : Logical reasons - based on
> scientific premises - for the existence of a Creator and that He
> hasn't left His sapient creatures without an Instruction Manual -
> Torah ['books of Moses'] - to ascertain, and aspire to, His purpose.
> 
> [Company] Anders Branderud IT Solutions - www.abitsolutions.org
> 

-- 
IPB Halle                    AG Massenspektrometrie & Bioinformatik
Dr. Steffen Neumann          http://www.IPB-Halle.DE
Weinberg 3                   http://msbi.bic-gh.de
06120 Halle                  Tel. +49 (0) 345 5582 - 1470
                                  +49 (0) 345 5582 - 0
sneumann(at)IPB-Halle.DE     Fax. +49 (0) 345 5582 - 1409