Fair Scheduling via Iterative Quasi-Uniform Sampling
Fair Scheduling via Iterative Quasi-Uniform Sampling
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DOI:
10.1137/1.9781611974782.171
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发表时间:
2017-01
期刊:
影响因子:
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通讯作者:
Sungjin Im;Benjamin Moseley
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文献类型:
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作者:
Sungjin Im;Benjamin Moseley
In the paper we consider minimizing the lk-norms of flow time on a single machine offline using a preemptive scheduler for k ≥ 1. We show the first O(1)-approximation for the problem, improving upon the previous best O(log log P)-approximation by Bansal and Pruhs (FOCS 09 and SICOMP 14) where P is the ratio of the maximum job size to the minimum. Our main technical ingredient is a novel combination of quasi-uniform sampling and iterative rounding, which is of interest in its own right.