[mpich-discuss] Problems with running make

[Gustavo Correa]

Hi Pavan

Many thanks for this clarification.  
I stand corrected.

Actually I guessed you MPICH developers might have already set 
something up to allow this kind of "collaborative" or "dialogue" MPI style
with different users names/IDs running MPI processes across different computers, 
for specific uses.

Not trying to hijack Ron's thread (he has more important hurdles to get behind him),
I wonder how mpiexec (Hydra), which is launched on one computer under
one user name, will trigger additional MPI processes on the other computers
under different user names (and how ssh may have to be setup to allow this to happen).

Cheers,
Gus

On Mar 2, 2014, at 12:39 PM, Balaji, Pavan wrote:

> Gus,
> 
> On Mar 2, 2014, at 10:43 AM, Gustavo Correa <gus at ldeo.columbia.edu> wrote:
>> Rajeev may correct me if I am wrong, 
>> but I think you *must* run MPI as the same user (name and UID) everywhere.
> 
> Not necessarily.
> 
> http://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager#Using_Hydra_on_Machines_with_Different_User_Names
> 
> But using the same username is definitely easier and safer.
> 
>  — Pavan
> 
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