Virtual network reconfiguration for reducing energy consumption in optical data centers
Virtual network reconfiguration for reducing energy consumption in optical data centers
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DOI：
10.1364/jocn.6.000925
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发表时间：
2014-10
期刊：
影响因子：
--
通讯作者：
Yuya Tarutani;Y. Ohsita;M. Murata
中科院分区：
文献类型：
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作者：
Yuya Tarutani;Y. Ohsita;M. Murata
数据中心的能耗已经成为一个严重的问题，应该制定降低能耗的措施。这种措施不仅应解决服务器的能源消耗问题，而且还应解决网络本身的能源消耗问题，因为后者占总能源消耗的很大一部分。降低数据中心内网络能耗的一种方法是在数据中心的核心使用光电路交换机(OCS)，其中电子交换机连接到OCS。在这样的网络中，可以通过设置OCS来连接电子分组交换机的不同端口来配置虚拟网络。因此，可以通过配置虚拟网络以最小化电子分组交换机所需的端口数并关闭任何未使用的端口来降低网络的能量消耗。本文提出了一种基于数据中心网络的虚拟网络重构方法(VNR-DCN)，该方法在基于光通信路径的数据中心网络中，在服务器之间的带宽和时延受限的情况下，立即对虚拟网络进行重构，以降低能耗。在VNR-DCN中，我们通过设置拓扑参数来配置虚拟网络以满足要求，称为广义平坦蝴蝶，而不是解决优化问题。在评估中，我们发现由VNR-DCN配置的虚拟网络需要少量的活动端口。此外，我们还展示了虚拟网络配置对能耗的影响。
Energy consumption by data centers has become a serious problem, and measures for its reduction should be developed. Such measures should address not only the energy consumption of the servers but also that of the network itself, because the latter is responsible for a substantial portion of the total energy consumption. One approach to reducing the energy consumption of the network within a data center is to use optical circuit switches (OCSs) at the core of the data center, where electronic switches are connected to the OCSs. In such a network, a virtual network can be configured by setting the OCSs to connect different ports of the electronic packet switches. Thus, the energy consumption of the network can be reduced by configuring the virtual network to minimize the number of ports required by the electronic packet switches and powering down any unused ports. In this paper, we propose a method called virtual network reconfiguration for data center networks (VNR-DCN) that immediately reconfigures the virtual network so as to reduce the energy consumption under the constraints on the bandwidth and delay between servers in data center networks based on optical communication paths. In VNR-DCN, we configure the virtual network to satisfy the requirements by setting the parameters of the topology, called generalized flattened butterfly, instead of solving an optimization problem. In the evaluation, we show that a virtual network configured by VNR-DCN requires a small number of active ports. In addition, we show the impact of virtual network configuration on energy consumption.