This one-day workshop on MPI will help researchers write better and portable parallel codes for distributed-memory machines like Linux clusters, such as MSI?s IBM Power4, SGI Altix, BladeCenter and Calhoun. It will focus on basic point-to-point communication and collective communications, which are the most commonly used MPI routines in high-performance scientific computation. In addition, the advantage of using MPI non-blocking communication will be introduced. Each session of the workshop will combine a lecture with hands-on practice. The lecture introduces basic principles, and the hands-on portion focuses on the use of MPI principles via examples. Session One: Introduction to basic concepts of "MPI is Small," centering on point-to-point communication. Session Two: MPI collective communications including broadcast, gather, scatter, and Alltoall. Programming will be done in Fortran and C, so any background in these two languages will be helpful.