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Subject: Re: [OMPI devel] Detailed documentation on OpenMPI
From: George Bosilca (bosilca_at_[hidden])
Date: 2013-08-23 06:38:32


Some questions are easier than others …

On Aug 23, 2013, at 07:54 , mahesh <mahsh.baheti_at_[hidden]> wrote:

> I know that its a huge code base. But, I am looking for specific answers like does OpenMPI use sockets?

When Open MPI is using TCP it does indeed use sockets.

> Can programs written without mpi libraries be run on
> clusters using orte(with some changes)?

Yes, that's why you can run "mpirun -np 4 hostname".

> It would be really helpful if at least these and related doubts can be solved.

Hope that helps.

  George.

>
> Thanks,
> Mahesh
>
> On Aug 22, 2013 (jsquyres) <jsquyres_at_[hidden]> wrote
>> Note that according to http://www.ohloh.net/p/openmpi, OMPI is over 3/4M lines of code. I doubt you will be able to get a thorough understanding of *all* of OMPI in a semester or two -- indeed, I doubt that any one Open MPI core developer has a thorough understanding of the whole code base (I know I don't!).
>>
>> I don't say these things to discourage you; I actually just want to encourage you to set realistic expectations for what you'll be able to do.
>>
>> Are there any particular areas that you'd like to focus on? MPI -- and the Open MPI implementation -- covers a *lot* of different subsystems and concepts.
>>
>>
>> On Aug 22, 2013, at 8:06 AM, mahesh <mahsh.baheti_at_[hidden]> wrote:
>>
>>> Hi,
>>> I am an newbie to all MPI concepts and I would like to understand the MPI source code thoroughly for
>>> an academic project. So, what I need is an detailed explanation of how every framework and module
>>> works. It would be really helpful if wise people could point me to right direction.
>>>
>>> Thanks,
>>> Mahesh
>>> _______________________________________________
>>> devel mailing list
>>> devel_at_[hidden]
>>> http://www.open-mpi.org/mailman/listinfo.cgi/devel
>>
>>
>> --
>> Jeff Squyres
>> jsquyres_at_[hidden]
>> For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
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