This appliance deploys a MPI cluster composed of bare metal instances using the MPICH3 implementation. A hostfile is automatically generated and provided to MPICH to utilize the available instances.

This appliance accepts the following parameters:

• key_name: name of a key pair to enable SSH access to the instance (defaults to "default")
• reservation_id: ID of the Blazar reservation to use for launching instances
• node_count: Number of physical nodes to launch

The following outputs are provided:

• first_instance_ip: The public IP address of the first bare-metal instance. Login with the command 'ssh cc@first_instance_ip'.
• deployment_results: The private IPs and hostnames of all deployed instances

To run MPI programs, execute the following command, assuming you have compiled a program called mpi.out:

mpiexec -n <nprocs> ./mpi.out

To compiling an MPI program, use a command such as this one:

mpicc mpi_hello.c -o mpi_hello