Competitive on-line scheduling with level of service

被引：10
|
作者：
Chang, EC
Yap, C
机构：
[1] NYU, Courant Inst, Dept Comp Sci, New York, NY USA
[2] Natl Univ Singapore, Dept Computat Sci, Singapore 117548, Singapore
来源：
JOURNAL OF SCHEDULING | 2003年 / 6卷 / 03期
关键词：
competitive analysis; on-line scheduling; level of service;
D O I：
10.1023/A:1022904408360
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Motivated by an application in thinwire visualization, we study an abstract on-line scheduling problem where the size of each requested service can be scaled down by the scheduler. Thus, our problem embodies a notion of "Level of Service" that is increasingly important in multimedia applications. We give two schedulers FirstFit and EndFit based on two simple heuristics, and generalize them into a class of greedy schedulers. We show that both FirstFit and EndFit are 2-competitive, and any greedy scheduler is 3-competitive. These bounds are shown to be tight.
引用
收藏
页码：251 / 267
页数：17
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