DDG Task Recovery for Cluster Computing ⋆

Abstract. This paper presents a solution for the problem of transparent recovery of asynchronous distributed computation on clusters of workstations when a fault occurs on a node. If the system has fault-tolerant features, it can survive the fault and continues its computations. Performance degradation is unavoidable when hardware redundancies are not available. It is a large advantage if the long-runtime application can restart from a checkpoint instead of restarting whole computation. This paper presents the fault-tolerant feature of the DDG environment oriented to cluster systems without hardware spare. 1