[one-users] How to get information of actual VMs from inside a cluster

[Akihiko Ota]

Hi Steffen,

> > I intend to build VM clusters for high-performance computing by
> > OpenNebula.
> > 
> 
> We have a "virtual" HPC cluster, using the SGE,
> and the nodes register themselves as SGE hosts during bootup.
> 
> 


That sounds fine. I consider using SGE.
I have a little worry that using batch system is more complicated than
simple MPI environment for users. But it seems this is a right way.




> > But, in order to submit MPI job, it is necessary to know actual
> > compute-node (hostname, IP address, cores, etc...).
> > The number of VM of cluster can change on-demand by OpenNebula.
> > But maybe each VM cannot know change of member of cluster.
> > 
> 
> Another possibility would be to run ganglia on the virtual nodes,
> and query ganglia for the running hosts available for the MPI jobs.
> 
> 

 

Well, this is a good idea.

Thank you for your advice!

-- 
Akihiko Ota

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