mpi !

Instances of Ubuntu Linux with MPICH -- portable implementation of Message Passing Interface (MPI) standard. Designed for MPI program development and deployment.

LabInstance mpi

inspired by NLKNguyen

Quickstart

This is a quickstart guide of how you can typically use this LabInstance to deploy MPI programs

• Working Directory

/project

• Default user for MPI

mpi

• The host file that contains addresses of connected workers can created with:

IP_ADDR=$(ip addr show | grep "inet " | grep "eth0" | awk '{print $2}')

nmap -sP $IP_ADDR | grep ondemand_mpi_worker | awk -F "[()]" '{ for (i=2; i<NF; i+=2) print $i }' > /project/hosts

• Compile

mpicc -o /project/mpi_hello_world examples/mpi_hello_world.c

• run the MPI hello world program

sudo -u mpi mpirun -n 10 -f /project/hosts /project/mpi_hello_world

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NOTE

# scp hello wrold to all clients. sudo -u mpi for auto scp connect. see /home/mpi/.ssh 
while read -r line; 
 do 
   sudo -u mpi scp /project/mpi_hello_world mpi@$line:/project/mpi_hello_world
done < /project/hosts

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