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arXiv 1405.7484cs.NI
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数据中心网络中具有硬截止期的节能流调度和路由

Energy-Efficient Flow Scheduling and Routing with Hard Deadlines in Data Center Networks

Lin Wang, Fa Zhang, Kai Zheng, Athanasios V. Vasilakos, Shaolei Ren, Zhiyong Liu

摘要:

数据中心中的巨大网络设备的功耗已经成为数据中心运营商的一大关注点。尽管有许多基于流量工程的解决方案,但很少关注性能保证的节能方案。在本文中,我们提出了一种新的节能模型的数据中心网络的调度和路由的“最后期限约束流”,其中每个流的传输必须在严格的截止日期之前完成,是最关键的要求,在生产数据中心网络。基于网络设备的速度缩放和掉电节能策略,我们的目标是探索最节能的方式来调度和路由网络上的流,以及确定每个流的传输速度。我们考虑两个一般版本的问题。对于流的路径预先给定的纯流调度问题,我们证明了它可以多项式求解,并给出了一个最优组合算法;对于流和路由的联合调度问题,我们证明了它是强NP-难的,除非P=NP,否则不可能有全多项式时间近似方案(FPTAS)。基于松弛和随机舍入技术,我们提供了一个有效的近似算法,它可以保证一个可证明的性能比关于多项式的总流量。

英文摘要:

The power consumption of enormous network devices in data centers has emerged as a big concern to data center operators. Despite many traffic-engineering-based solutions, very little attention has been paid on performance-guaranteed energy saving schemes. In this paper, we propose a novel energy-saving model for data center networks by scheduling and routing "deadline-constrained flows" where the transmission of every flow has to be accomplished before a rigorous deadline, being the most critical requirement in production data center networks. Based on speed scaling and power-down energy saving strategies for network devices, we aim to explore the most energy efficient way of scheduling and routing flows on the network, as well as determining the transmission speed for every flow. We consider two general versions of the problem. For the version of only flow scheduling where routes of flows are pre-given, we show that it can be solved polynomially and we develop an optimal combinatorial algorithm for it. For the version of joint flow scheduling and routing, we prove that it is strongly NP-hard and cannot have a Fully Polynomial-Time Approximation Scheme (FPTAS) unless P=NP. Based on a relaxation and randomized rounding technique, we provide an efficient approximation algorithm which can guarantee a provable performance ratio with respect to a polynomial of the total number of flows.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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