[mpich-discuss] Error running with hydra

[Pavan Balaji]

Hydra should work fine with the "< /dev/null" redirection as well. I just tried it with trunk and it seems to work fine.

Can you try out the nightly snapshot to make sure this is OK on trunk? http://www.mcs.anl.gov/research/projects/mpich2/downloads/tarballs/nightly/hydra

 -- Pavan

--
Pavan Balaji
http://www.mcs.anl.gov/~balaji

----- Original Message -----
> Dear Pavan,
> 
> this is my command for mpiexec.hydra:
> 
> mpiexec.hydra -bootstrap ssh -f machinefile -n 4 ./3dfdtd > run.txt <
> /dev/null
> 
> and this is the one for mpd:
> 
> mpiexec -machinefile machinefile -n 4 ./3dfdtd > run.txt < /dev/null
> 
> I have been able to have the code running with hydra removing the <
> /dev/null at the end of the script, that was added by one of my
> students
> (I don't know why).
> It seems to create some problems with hydra, but not with mpd.
> 
> We need to change from mpd (we use to run it at boot time as root) to
> hydra because mpd daemons sometimes die without reasons on the slave
> machines on this system (where we are using scientific linux). All is
> regularly working with mpd on another cluster running ubuntu server
> 10.04.
> 
> Regards.
> 
> Gaetano
> 
> 
> Il 10/12/2010 13:12, Pavan Balaji ha scritto:
> > What is the *exact* command you gave?
> >
> >   -- Pavan
> >
> > --
> > Pavan Balaji
> > http://www.mcs.anl.gov/~balaji
> >
> > ----- Original Message -----
> >> Hi,
> >> I'm having problems running a simulation with hydra.
> >> By submitting a job to a queue system (pbs) with the command:
> >>
> >> mpiexec-hydra -bootstrap ssh -f machinefile -n number_of_processors
> >> name_exec
> >>
> >> I'm receiving this message:
> >> HYDU_create_process (./utils/launch/launch.c:69): execvp error on
> >> file
> >> 4
> >> (Permission denied).
> >>
> >> The same code works on the same system using mpd .
> >>
> >> Any idea?
> >>
> >> Best regards.
> >>
> >> Gaetano
> >> _______________________________________________
> >> mpich-discuss mailing list
> >> mpich-discuss at mcs.anl.gov
> >> https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss
> >
> 
> --
> Gaetano Bellanca - Department of Engineering - University of Ferrara
> Via Saragat, 1 - 44122 - Ferrara - ITALY
> Voice (VoIP): +39 0532 974809 Fax: +39 0532 974870
> mailto:gaetano.bellanca at unife.it
> 
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