== Install MPICH on your VM ==

You can do either a) easy package installtion of MPI2 
OR b) build MPI3.

You should only need MPI2 for the assignment.

a) easy package installation of MPI2

sudo yum install mpich2
sudo yum install mpich2-devel
sudo yum install mpich2-autoload


b) OR build MPI3

	download mpich
		wget http://www.mpich.org/static/tarballs/3.0.2/mpich-3.0.2.tar.gz
		tar xzf mpich-3.0.2.tar.gz

	build mpich and install in home (can also see mpich-3.0.2/README)
		cd mpich-3.0.2
		 ./configure --prefix=$HOME/mpich-install 2>&1 | tee c.txt
		 make 2>&1 | tee m.txt
		 make install 2>&1 | tee mi.txt

	put mpi binaries (e.g. mpicc, mpirun) on your PATH
		add the following line to your ~/.bashrc:
			export PATH=$PATH:~/mpich-install/bin
		source ~/.bashrc

== Run on your VM ==
	compile hello world (from lecture)
		mpicc helloworld.c -o helloworld
	
	run the program on 2 MPI processes
		mpirun -np 2 -host localhost ./helloworld



== run on the VM cluster (optional but fun!) ==

	Note: MPI is already installed

	login to one of the 8 compute nodes
		ssh csep524-{01-08}.cs.washington.edu   # i.e. pick a number 01,02...,08

	setup keys (mpirun will spawn processes though ssh, and you don't want to type your password every time!)
		set up a private/public key in .ssh

	compile hello world (from lecture)
		mpicc helloworld.c -o helloworld

	run the program on 2 MPI processes, on hosts csep524-01 and csep524-02
		mpirun -hosts csep524-01,csep524-02 -np 2 ./helloworld