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ThinkMind // CLOUD COMPUTING 2011, The Second International Conference on Cloud Computing, GRIDs, and Virtualization // View article cloud_computing_2011_8_10_20028
Making VM Consolidation More Energy-efficient by Postcopy Live Migration
 Authors:
Takahiro Hirofuchi
Hidemoto Nakada
Satoshi Itoh
Satoshi Sekiguchi Keywords: Virtual Machine, Live Migration, Consolidation, Data Center, Energy Saving Abstract:
Dynamic consolidation of virtual machines (VMs) is a promising technology for reducing energy consumption of data centers. Existing studies on VM consolidation, however, are based on precopy live migration; it is difficult to optimize VM locations aggressively due to its long and undeterminable migration process. In this paper, we propose an energy-efficient VM consolidation system exploiting postcopy live migration, which always allows quick live migration for any VMs. The consolidation system can optimize VM locations and server power states more frequently than those of using precopy live migration. In our previous work, we implemented postcopy live migration for KVM, and in this paper, we developed the prototype of our consolidation system, where excessive hardware nodes were suspended by means of ACPI S3 and all power usages were monitored with watt meters. Our experiments showed that our consolidation system with postcopy live migration eliminated more excessive power consumption than that of using precopy live migration. Postcopy live migration allowed the prototype system to eliminate 11.8% energy overheads of actively-running VMs, which was improved by approximately 50% from precopy live migration. Pages: 195 to 204 Copyright: Copyright (c) IARIA, 2011 Publication date: September 25, 2011 Published in: conference ISSN: 2308-4294 ISBN: 978-1-61208-153-3 Location: Rome, Italy Dates: from September 25, 2011 to September 30, 2011
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