Parallel Java: A unified API for shared memory and cluster parallel programming in 100% Java

Parallel Java is a parallel programming API whose goals are (1) to support both shared memory (thread-based) parallel programming and cluster (message-based) paral-lel programming in a single unified API, allowing one to write parallel programs combining both paradigms; (2) to provide the same capabilities as OpenMP and MPI in an object oriented, 100 % Java API; and (3) to be easily de-ployed and run in a heterogeneous computing environment of single-core CPUs, multi-core CPUs, and clusters thereof. This paper describes Parallel Java’s features and architec-ture; compares and contrasts Parallel Java to other Java-based parallel middleware libraries; and reports perfor-mance measurements of Parallel Java programs. 1