We propose a framework built around a JavaSpace to ease the development of bag-of-tasks applications. The framework may optionally and automatically tolerate transient crash failures occurring on any of the distributed elements. It relies on checkpointing and underlying middleware mechanisms to do so. To further improve checkpointing efficiency, both in size and frequency, the programmer can introduce intermediate user-defined checkpoint data and code within the task processing program. The framework used without fault tolerance accelerates application development, does not introduce runtime overhead and yields to expected speedup. When enabling fault tolerance, our framework allows, despite failures, correct completion of applications with limited runtime and data storage overheads. Experiments run with up to 128 workers study the impact of some user-related and implementation-related on overall performance, and reveal good performances for classical JavaSpace-based master-worker application profiles.
