1 PAPER Special Section on Parallel/Distributed Computing and Networking Controller/Precompiler for Portable Checkpointing

compiler for Portable Checkpointing), a checkpointing tool designed for heterogeneous clusters and Grid infrastructures through the use of portable protocols, portable checkpoint files and portable code. It works at variable level being user-directed, thus generating small checkpoint files. It allows parallel pro-cesses to checkpoint independently, without runtime coordina-tion or message-logging. Consistency is achieved at restart time by negotiating the restart point. A directive-based checkpointing precompiler has also been implemented to ease up user’s effort. CPPC was designed to work with parallel MPI programs, though it can be used with sequential ones, and easily extended to pa-rallel programs written using different message-passing libraries, due to its highly modular design. Experimental results are shown using CPPC with different test applications. key words: Parallel programming, fault tolerance, checkpoin-ting, MPI. 1