Hi MPICH 3.0.4 was installed in the system because other applications have been tested with this implementation. And specifically, RAMS model developers recommend mpich2-1.4.1 as they have tested before and run without any problem. How can I debug/save logs for an mpich application? Although I'm not an expert with MPICH and parallel computing I would like (I need) to solve this problem. Thanks El mié., 12 abr. 2017 a las 2:36, Guo, Yanfei (<[email protected]>) escribió:

Hi,

MPICH 3.0.4 is a quite old version. Can you try your application with the latest MPICH (3.2) http://www.mpich.org/downloads/ ?

Yanfei Guo Postdoctoral Researcher MCS Division, ANL

On 4/11/17, 5:57 AM, "CEAM Meteorología" <[email protected]> wrote:

Hi MPICH users

I am trying to run a meteorological simulation with RAMS model ( http://vandenheever.atmos.colostate.edu/vdhpage/rams.php) < http://vandenheever.atmos.colostate.edu/vdhpage/rams.php%29> in a new cluster with CentOs7 in all nodes. We have other applications running fine in the cluster, sending processes to each node,... everything seemd to run fine.

But the RAMS model freezes at its first stage on the parallel run. RAMS developers recommend using mpich2-1.4.1 as they have successfully tested. If I try to run a parallel simulation in the master node it runs fine and starts the required number of processes. If I try to use the other nodes the simulation freezes, do not stop with any error message; RAMS model processes appear in all used nodes and in the master node but any output is created and the usual status messages from RAMS do not appear on screen.

The commnad line to run the model is

[paco@Llamp RUN]$ time ../misc/mpich2-1.4.1/bin/mpirun -verbose -machinefile mpd.hosts -n 20 ./rams-6.2.03 -f RAMSIN

I have also compiled and tried to run with mpich 3.0.4 but it behaves exactly the same way.

Log messages with -verbose option for both mpich2-1.4.1 and mpich3.0.4 can be found at

MPICH2-1.4.1: https://www.dropbox.com/s/6sgkarmsi5vrdfd/RAMS-mpich2-1.4.1.log?dl=0 < https://www.dropbox.com/s/6sgkarmsi5vrdfd/RAMS-mpich2-1.4.1.log?dl=0>

MPICH3.0.4: https://www.dropbox.com/s/bxvl5q6dy03pgew/RAMS-mpich2-3.0.4.log?dl=0 < https://www.dropbox.com/s/bxvl5q6dy03pgew/RAMS-mpich2-3.0.4.log?dl=0>

cpi example runs fine with both mpich instances

Thanks in advance for your help and best regards

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