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On checkpointing and heavy-tails in unreliable computing environments

In this paper, we discuss checkpointing issues that should be considered whenever jobs execute in unreliable computing environments. Specifically, we show that if proper check-pointing procedures are not properly implemented, then under certain conditions, job completion time distributions exhibit properties of heavy-tail or power-tail distributions (hereafter referred to as power-tail distributions (PT), which can lead to highly-variable and long completion times.