How data center size impacts the effectiveness of dynamic power management

How data center size impacts the effectiveness of dynamic power management
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数据中心规模如何影响动态电源管理的有效性

DOI:
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发表时间:
2011
期刊:
Allerton Conference on Communication, Control, and Computing
影响因子:
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通讯作者:
Mor Harchol
Mor Harchol
中科院分区:
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文献类型:
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作者:
Anshul Gandhi;Mor Harchol

文献摘要

被引文献

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功耗占数据中心运营费用的很大一部分。可悲的是,这些能力中的大部分都浪费在了服务器上,即使没有工作要做。动态电源管理旨在通过在不需要服务器时关闭服务器来减少数据中心的电力浪费。但是,重新打开服务器需要一定的设置时间,这可能会对系统性能产生不利影响。因此,在数据中心中是否应该采用动态功率管理并不明显。本文采用矩阵分析方法,分析了M/M/k模型下数据中心动态电源管理的有效性。我们发现,即使是最简单的动态电源管理策略的有效性随着数据中心的大小,超过静态电源管理时,服务器的数量超过50,在现实的设置成本和服务器利用率。此外,我们发现,传统的动态电源管理的一个小的增强,包括延迟时间,直到服务器关闭,可以产生的好处,即使是数据中心的规模小到4台服务器的静态电源管理。
Power consumption accounts for a significant portion of a data center's operating expenses. Sadly, much of this power is wasted by servers that are left on even when there is no work to do. Dynamic power management aims to reduce power wastage in data centers by turning servers off when they are not needed. However, turning a server back on requires a setup time, which can adversely affect system performance. Thus, it is not obvious whether dynamic power management should be employed in a data center. In this paper, we analyze the effectiveness of dynamic power management in data centers under an M/M/k model via Matrix-analytic methods. We find that the effectiveness of even the simplest dynamic power management policy increases with the data center size, surpassing static power management when the number of servers exceeds 50, under realistic setup costs and server utilizations. Furthermore, we find that a small enhancement to traditional dynamic power management, involving delaying the time until a server turns off, can yield benefits over static power management even for data center sizes as small as 4 servers.