[mpich-discuss] translate rank to hostname

[Jeff Hammond]

Try MPI_Allgather on the output of MPI_Get_processor_name.

Jeff

On Thu, Mar 12, 2015 at 10:41 PM, YANG Fan <iddmbr at gmail.com> wrote:
> Thanks, Jeff!
>
> But there's one problem. Suppose I'm on rank 1 and I want to know the host
> name of rank 2, then using this function I can only know my own host name. I
> hope that I can know others' host names...
>
> On Fri, Mar 13, 2015 at 11:15 AM, Jeff Hammond <jeff.science at gmail.com>
> wrote:
>>
>> Try MPI_Get_processor_name.
>>
>> Jeff
>>
>>
>> On Thursday, March 12, 2015, YANG Fan <iddmbr at gmail.com> wrote:
>>>
>>> Hi,
>>>
>>> To run an MPI program on a cluster I need to pass the host file as a
>>> parameter. However, how can I know that what host name does a specific rank
>>> correspond to? Or how can I access the host file inside my MPI program?
>>> Thanks!
>>>
>>> Best Regards,
>>> Fan
>>
>>
>>
>> --
>> Jeff Hammond
>> jeff.science at gmail.com
>> http://jeffhammond.github.io/
>>
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>
>
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-- 
Jeff Hammond
jeff.science at gmail.com
http://jeffhammond.github.io/
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