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A Large-scale Power-saving Cloud System Composed of Multiple Data Centers

Authors:
Toshiaki Suzuki
Tomoyuki Iijima
Isao Shimokawa
Toshiaki Tarui
Shinichi Kuwahara
Hidenori Takagi
Tomohiro Baba

Keywords: power saving; QoS; cloud system; virtual-machine migration; network congestion; resource allocation

Abstract:
A large-scale power-saving cloud system-composed of multiple data centers (DCs) and a wide-area network (WAN) connecting them is proposed. In this system, to reduce power consumption of the DCs and the WAN, virtual machines (VMs) are migrated and data routing paths are optimized under the condition that quality of service (QoS) is maintained by simultaneously providing necessary CPU resources and network bandwidth for services by a VM. To address the issue of excess VM migration (causing network congestion) due to separate control of "server resource" and "network resource" by a conventional power-saving scheme, the proposed system controls power consumption by cooperation between an inter-DC management server and a WAN management server. To determine an appropriate resource allocation, conditions for various resources (such as CPU loads and bandwidth consumed by network switches) are monitored in real time. In addition, future loads for the resources are periodically predicted. An appropriate VM reallocation is only executed when necessary resources after the reallocation can be guaranteed. A prototype system comprising 200 VMs, 200 servers, and four DCs was developed and evaluated. The evaluation results indicate that the system can achieve power saving by VM migration between DCs under the condition that the necessary CPU resource and network-access bandwidth for providing services by a VM are maintained.

Pages: 127 to 133

Copyright: Copyright (c) IARIA, 2013

Publication date: March 24, 2013

Published in: conference

ISSN: 2308-412X

ISBN: 978-1-61208-259-2

Location: Lisbon, Portugal

Dates: from March 24, 2013 to March 29, 2013