Difference between revisions of "Tutorial: Running MPI Programs on Hadoop Cluster"
(→Setup Password-Less ssh to the Hadoop cluster) |
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mv id_rsa.pub id_rsa.mpi.pub | mv id_rsa.pub id_rsa.mpi.pub | ||
ssh yourusername@hadoop02.dyndns.org mkdir -p .ssh | ssh yourusername@hadoop02.dyndns.org mkdir -p .ssh | ||
| − | cat id_rsa.mpi.pub | ssh yourusername@hadoop02.dyndns.org 'cat >> .ssh/authorized_keys' | + | cat ~/.ssh/id_rsa.mpi.pub | ssh yourusername@hadoop02.dyndns.org 'cat >> .ssh/authorized_keys' |
</source> | </source> | ||
<br /> | <br /> | ||
| Line 37: | Line 37: | ||
:::<source lang="text"> | :::<source lang="text"> | ||
ssh yourusername@hadoop03.dyndns.org mkdir -p .ssh | ssh yourusername@hadoop03.dyndns.org mkdir -p .ssh | ||
| − | cat id_rsa.mpi.pub | ssh yourusername@hadoop03.dyndns.org 'cat >> .ssh/authorized_keys' | + | cat ~/.ssh/id_rsa.mpi.pub | ssh yourusername@hadoop03.dyndns.org 'cat >> .ssh/authorized_keys' |
ssh yourusername@hadoop04.dyndns.org mkdir -p .ssh | ssh yourusername@hadoop04.dyndns.org mkdir -p .ssh | ||
| − | cat id_rsa.mpi.pub | ssh yourusername@hadoop04.dyndns.org 'cat >> .ssh/authorized_keys' | + | cat ~/.ssh/id_rsa.mpi.pub | ssh yourusername@hadoop04.dyndns.org 'cat >> .ssh/authorized_keys' |
</source> | </source> | ||
<br /> | <br /> | ||
| Line 48: | Line 48: | ||
</onlysmith> | </onlysmith> | ||
<br /> | <br /> | ||
| + | |||
=Test MPI= | =Test MPI= | ||
<br /> | <br /> | ||
Revision as of 11:42, 15 March 2017
--D. Thiebaut (talk) 13:57, 15 October 2013 (EDT)
Revised: --D. Thiebaut (talk) 12:02, 15 March 2017 (EDT)
Contents
Setup Password-Less ssh to the Hadoop cluster
Test MPI
MPI should already be installed, and your account ready to access it. To verify this, create a simple MPI "Hello World!" program, compile it, and run it.
/* C Example */ #include <stdio.h> #include <mpi.h> int main (argc, argv) int argc; char *argv[]; { int rank, size; MPI_Init (&argc, &argv); /* starts MPI */ MPI_Comm_rank (MPI_COMM_WORLD, &rank); /* get current process id */ MPI_Comm_size (MPI_COMM_WORLD, &size); /* get number of processes */ printf( "Hello world from process %d of %d\n", rank, size ); MPI_Finalize(); return 0; }
- Compile and Run
mpicc -o hello helloWorld.c mpirun -np 2 ./hello Hello world from process 0 of 2 Hello world from process 1 of 2
- If you see the two lines starting with "Hello world" on your screen, MPI was successfully installed on your system!
Configuration for Running On Multiple Servers
