On Jun 17, 2014, at 17:39 , Reuti <[email protected]> wrote:

> It was only a test whether by default call of the function will output the 
> short name or the FQDN. I still wonder, why this happens.

glibc implements gethostname() via uname() (and strace shows two uname() calls 
in mpiexec.hydra), so this should return the short name always.

> Can you output the name of the node the process thinks it's running on? Maybe 
> this will work, although I'm not sure whether it will output the FQDN at all:
> 
> https://software.intel.com/sites/products/documentation/hpc/ics/impi/41/lin/Reference_Manual/Environment_Variables_Job_Startup_Command.htm
> 
> $ mpiexec.hydra -env I_MPI_DEBUG 2,pid,host …

Indeed:
...
[7#7588@node14-02] DAPL startup(): trying to open DAPL provider from 
I_MPI_DAPL_PROVIDER: ofa-v2-ib0
…

A.



-- 
Ansgar Esztermann
DV-Systemadministration
Max-Planck-Institut für biophysikalische Chemie, Abteilung 105

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