TY - JOUR
T1 - Virtual network reconfiguration for reducing energy consumption in optical data centers
AU - Tarutani, Yuya
AU - Ohsita, Yuichi
AU - Murata, Masayuki
N1 - Publisher Copyright:
© 2014 OSA.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014/10/1
Y1 - 2014/10/1
N2 - 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.
AB - 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.
KW - Data center
KW - Energy consumption
KW - Optical network
KW - Virtual network
UR - http://www.scopus.com/inward/record.url?scp=84908117126&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84908117126&partnerID=8YFLogxK
U2 - 10.1364/JOCN.6.000925
DO - 10.1364/JOCN.6.000925
M3 - Article
AN - SCOPUS:84908117126
VL - 6
SP - 925
EP - 942
JO - Journal of Optical Communications and Networking
JF - Journal of Optical Communications and Networking
SN - 1943-0620
IS - 10
M1 - 6924129
ER -