Making VM Consolidation More Energy-Efficient by Postcopy Live Migration
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 pre-copy live migration; it is difficult to optimize VM locations aggressively due to its long and undeterminable migration process. In this paper, the authors propose an energy-efficient VM consolidation system exploiting post-copy 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 pre-copy live migration.