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README.md
mpi !
Instances of Ubuntu Linux with MPICH -- portable implementation of Message Passing Interface (MPI) standard. Designed for MPI program development and deployment.
LabInstance mpi2
NOTE
Vlabs are reset every night around 02:00!
If you would like to keep your work please refer to "publish".
Vlabs dont have firewall restrictions BUT the machines are not exposed to the internet.
You share all machines so please be cooperative and discrete.
Quickstart
This is a quickstart guide of howto use this LabInstance to deploy MPI programs
HowTo use it
- cd /home/ubuntu
git clone https://git.swarmlab.io:3000/labs/examples-mpi2.git
- cd examples-mpi2/examples
make all
Default Configuration
- Working Directory
/home/ubuntu
- Default user
ubuntu
Find lab workers
The host file that contains addresses of connected workers can be created with:
swarmlab-getworkers > /home/ubuntu/invhosts
connect to workers
ssh ubuntu@[IP]
Info: user has sudo privileges without a password
Compile
mpicc -o /home/ubuntu/mpi_hello_world examples/mpi_hello_world.c
run the MPI hello world program
mpirun -n 10 -f /home/ubuntu/hosts /home/ubuntu/mpi_hello_world
NOTE: copy hello world to all clients
# scp hello wrold to all clients. sudo -u mpi for auto scp connect. see /home/mpi/.ssh
while read -r line;
do
scp /home/ubuntu/mpi_hello_world ubuntu@$line:/home/ubuntu/mpi_hello_world
done < /home/ubuntu/hosts
Publish Your Work
mkdir /home/ubuntu/directory
put your files and other directories into /home/ubuntu/directory
swarmlab-publish /home/ubuntu/directory
open URL in Browser
MORE INFO
See examples directory
cd examples
make mpi_hello_world
make example ex=squares
...