Analysis of virtual machine live-migration as a method for power-capping

  • Authors:

  • Jinkyu Jeong;Sung-Hun Kim;Hwanju Kim;Joonwon Lee;Euiseong Seo

  • Affiliations:

  • Department of Computer Science, Korea Advanced Institute of Science and Technology, Daejeon, Korea;College of ICE, Sungkyunkwan University, Suwon, Korea;Department of Computer Science, Korea Advanced Institute of Science and Technology, Daejeon, Korea;College of ICE, Sungkyunkwan University, Suwon, Korea;College of ICE, Sungkyunkwan University, Suwon, Korea

  • Venue:
  • The Journal of Supercomputing
  • Year:
  • 2013

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Abstract

To reduce the construction cost of the power-supplying infrastructure in data centers and to increase the utilization of the existing one, many researchers have introduced software-based or hardware-based power-capping schemes. In servers with consolidated virtual machines, which can be easily found in cloud systems, exporting virtual machines to other light-loaded servers through live-migration is one of the key approaches to impose power-capping on servers. Up until now, most researchers who have tried to achieve power-capping through live-migration assumed that exporting a virtual machine instantly reduces the server power consumption. However, our analysis introduced in this paper reveals that the power consumption remains high or increases for a few seconds during a migration instance. This behavior contradicts the aim of power-capping, and may endanger the stability of servers. Based on this observation, we also propose and evaluate two power-suppressing live-migration schemes to resolve the power overshooting issue. Our evaluation shows that both approaches immediately limit the power consumption after live-migration is initiated.