Rescheduling to minimize makespan on a changing number of identical processors
Rescheduling to minimize makespan on a changing number of identical processors
复制标题
重新调度以最大程度地减少数量不断变化的相同处理器的完工时间
DOI:
10.1002/nav.3800330414
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发表时间:
1986
期刊:
影响因子:
--
通讯作者:
C. Tovey
中科院分区:
文献类型:
--
作者:
C. Tovey
We consider the problem of rescheduling n jobs to minimize the makespan on m parallel identical processors when m changes value. We show this problem to be NP-hard in general. Call a list schedule totally optimal if it is optimal for all m = 1, …,n. When n is less than 6, there always exists a totally optimal schedule, but for n ≥ 6 this can fail. We show that an exact solution is less robust than the largest processing time first (LPT) heuristic and discuss implications for polynomial approximation schemes and hierarchical planning models.