[mpich-discuss] multiple mpd rings as one user

Rajeev Thakur thakur at mcs.anl.gov
Tue Jan 27 10:59:44 CST 2009

Do you really need multiple MPD rings? You can run multiple jobs with one


From: mpich-discuss-bounces at mcs.anl.gov
[mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of
oliver.wissdorf at boehringer-ingelheim.com
Sent: Tuesday, January 27, 2009 10:04 AM
To: mpich-discuss at mcs.anl.gov
Subject: [mpich-discuss] multiple mpd rings as one user


I want to start multipel rings as one user on a linux cluster to submit more
than one job at a time. Therefore I use mpdboot and mpdexec:

/usr/mpi/gcc/mvapich2-1.0.2/bin/mpdboot  -n 17 -f $PWD/mpd.txt --verbose

/usr/mpi/gcc/mvapich2-1.0.2/bin/mpiexec -machinefile $WORKDIR/mpd.txt -n $np

I tried to set MPD_CON_EXT before starting the mpdboot and this allows me to
start multiple mpds on the host where the ring starts, but not on the other
hosts of the ring.

I also tried to use -1 option with mpdboot, but this did not work either. 

Is there a way to solve this issue? Did I make any mistakes? 


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