MPI-DDL - A DISTRIBUTED-DATA LIBRARY FOR MPI

The Message-Passing Interface (MPI) defines a de facto standard for wr iting message-passing programs. However, MPI operates at a rather low level in the sense that a programmer regards a message as a programmin g unit. We present a new point of view. In our approach, a programmer regards distributed data as a programming unit. MPI-DDL is a programmi ng environment which contains an application-oriented layer on top of MPI to facilitate the programming of distributed data, and a set of to ols. We present initial performance comparisons of two matrix algorith ms using MPI-DDL, HPF, and direct MPI implementations.