CS591E Fall 2003: Project Assignment 2

Project Assignment 2

Try compile and run an MPI-IO program

Find a simple MPI-IO program and compile it. There is an examples directory on the class cluster, at
```
/opt/mpich-1.2.4..8/examples
```
It contains an MPI-IO sample program called simpleio.c. The examples directory also contains a Makefile. You can copy the whole directory to your work directory and compile the simpleio program there.
Execute the program on 2 processors:
```
mpirun -machinefile ~/.rhosts -np 2 simpleio -fname test
```
Try again with a different number of processors.
Download and compile coll_perf.c, which measures MPI-IO collective read/write performance. Run the program with 4 processors:
```
mpirun -machinefile ~/.rhosts -np 4 coll_perf -fname coll_test
```

Modify an MPI-IO program and perform basic benchmarking

Read this paper: A Case for Using MPI's Derived Datatypes to Improve I/O Performance.
Modify coll_perf.c to have the default block distribution on a 2-D 2048 by 2048 integer array (total array size is 16MB). Implement the level 0 through level 3 parallel I/O methods. Measure their aggregate read/write throughput in MB/s using 4 MPI processes on 4 nodes, using your home directory as file destination. Report the results from no less than 5 experiments in an Excel (or other software that you are familiar with) chart. Print the chart and bring it to the class on due day.
Repeat the above expriments, but forcing the 4 MPI processes to run on 2 SMP nodes.

Find existing Grid systems

Here is an example of an existing Grid system: NPACI grid. Collaborate with each other and find three more existing grid systems. For each of them, prepare 3-4 overview slides introducing the hardware and software facilities, and 1-2 slides discussing their job submission procedure: how can a user submit her job to this grid system? What information is required? Give web links. Present the slides in class on the due day.
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