Virtual machine migration (VMM) is a crucial way to ensure load balancing and save energy consumption of cloud hosts. In most previous studies, they apply the same virtual machine migration strategy for overloaded hosts, which ignore the possible communication between the migrated VM, and other factors. Thus, they are prone to incur excessive network overhead. This paper proposes a virtual machine migration strategy based on the three-way decision (VMM-3WD) to save cloud hosts’ energy consumption while considering the network correlation between virtual machines. The strategy first is to classify hosts into overloaded hosts, regular load hosts, and under-loaded hosts based on their load situation. Then, different migration strategies are targeted developed for these three types of cloud hosts. Specifically, the approach migrates the VMs in under-loaded hosts to regular load hosts. And then, the approach further develops two thresholds to divides overloaded hosts into massively overloaded hosts, moderately overloaded, and lightly overloaded hosts. The migration decision of VMs in all stages pursuing the goal of reducing the energy consumption of the network during the migration process. The experimental results show that the proposed algorithm can reduce the energy consumption generated by virtual machine migration and data center (DC) energy consumption while meeting the SLA.

中文翻译：

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基于三向决策的能源感知虚拟机迁移策略

虚拟机迁移（VMM）是保证云主机负载均衡、节省能耗的重要途径。在之前的大多数研究中，他们对过载的主机应用相同的虚拟机迁移策略，忽略了迁移的虚拟机之间可能的通信以及其他因素。因此，它们很容易产生过多的网络开销。本文提出一种基于三向决策（VMM-3WD）的虚拟机迁移策略，以节省云主机的能耗，同时考虑虚拟机之间的网络相关性。该策略首先根据主机的负载情况将主机分为过载主机、正常负载主机和负载不足主机。然后针对这三类云主机有针对性地制定了不同的迁移策略。具体来说，该方法将负载不足的主机中的虚拟机迁移到正常负载的主机上。然后，该方法进一步制定了两个阈值，将超载主机分为严重超载主机、中度超载主机和轻度超载主机。各个阶段虚拟机的迁移决策都追求在迁移过程中降低网络能耗的目标。实验结果表明，该算法在满足SLA的同时，可以降低虚拟机迁移产生的能耗和数据中心（DC）能耗。