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Backfilling and short-job-first are widely acknowledged enhancements to the simple but popular first-come, first-served job scheduling policy. However, both enhancements depend on user-provided estimates of job runtime, which research has repeatedly shown to be inaccurate. We have investigated the effects of this inaccuracy on backfilling and different queue prioritization policies, determining which part of the scheduling policy is most sensitive. Using these results, we have designed anddoi:10.1109/ipdps.2010.5470474 dblp:conf/ipps/TangDBL10 fatcat:jmhukxs3grf4fk7bpjhq55ctei