I have a seprate process which is not linked to this process and hence
doesnot know anything about this MPI process. I wants to receive some data
for this server process.
Hence I wanted to know if i could specify a specific port. I have used
MPI_publish and it seem to work fine.
Please advice further is there is a way to start a service at a particular
port.
Thanks
Abhishek
From: Edgar Gabriel <gabr...@cs.uh.edu>
Reply-To: Open MPI Users <us...@open-mpi.org>
To: Open MPI Users <us...@open-mpi.org>
Subject: Re: [OMPI users] MPI_Info for MPI_Open_port
Date: Tue, 11 Jul 2006 13:29:53 -0500
John Robinson wrote:
> The MPI publish/lookup calls should handle this, if OpenMPI has them. I
> haven't tried this with OpenMPI yet, but it claims MPI-2 compilance,
> right? ;-)
of course, but MPI does not say what an MPI port has to be. For Open MPI
this is *not* equal to a TCP port number... So you can open a port,
publish it, and another process can look this port-name up
>
> /jr
> ---
> Ralph H Castain wrote:
>> On 7/11/06 11:59 AM, "Edgar Gabriel" <gabr...@cs.uh.edu> wrote:
>>
>>
>>> Abhishek Agarwal wrote:
>>>
>>>> Hello,
>>>>
>>>> Is there a way of providing a specific port number in MPI_Info
>>>> when using a MPI_Open_port command so that clients know which
>>>> port number to connect.
>>> the MPI port-name in Open MPI has nothing to do with a TCP port
>>> number. The port-name right now is a combination of the process
>>> name ( a tuple of cell id, job id and process id) and a tag used
>>> for the communication.
>>>
>>> Maybe somebody from the RTE group could comment on whether there is
>>> a possibility to specify a specific port number for OOB
>>> communication, I am not aware of any right now...
>>
>> I'm afraid not - the port number for OOB communications is determined
>> dynamically be each process, and then communicated between them.
>>
>> I'm not sure what your intended purpose is here, of course, but you
>> don't need to worry about your process being able to "talk" via the
>> OOB - it's all done automatically during launch.
>>
>> Ralph
>>
>>
>>
>>> Thanks Edgar
>>>
>>>
>>>> Do advice of any solution so that we can create the portname
>>>> inside the client once we know the port number of server.
>>>>
>>>> Thanks Abhishek
>>>>
>>>>
>>>> _______________________________________________ users mailing
>>>> list us...@open-mpi.org
>>>> http://www.open-mpi.org/mailman/listinfo.cgi/users
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>>
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--
Edgar Gabriel
Assistant Professor
Department of Computer Science email:gabr...@cs.uh.edu
University of Houston http://www.cs.uh.edu/~gabriel
Philip G. Hoffman Hall, Room 524 Tel: +1 (713) 743-3857
Houston, TX-77204, USA Fax: +1 (713) 743-3335
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