Virtual machine consolidation has been a widely explored topic in recent years due to Cloud Data Centers’ effect on global energy consumption. Thus, academia and companies made efforts to achieve green computing, reducing energy consumption to minimize environmental impact. By consolidating Virtual Machines into a fewer number of Physical Machines, resource provisioning mechanisms can shutdown idle Physical Machines to reduce energy consumption and improve resource utilization. However, there is a tradeoff between reducing energy consumption while assuring the Quality of Service established on the Service Level Agreement. This work introduces a Systematic Literature Review of one year of advances in virtual machine consolidation. It provides a discussion on methods used in each step of the virtual machine consolidation, a classification of papers according to their contribution, and a quantitative and qualitative analysis of datasets, scenarios, and metrics.

中文翻译：

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虚拟机整合系统文献综述

由于云数据中心对全球能源消耗的影响，虚拟机整合近年来一直是一个广泛探讨的话题。因此，学术界和企业都在努力实现绿色计算，降低能源消耗以尽量减少对环境的影响。通过将虚拟机整合到更少数量的物理机中，资源配置机制可以关闭空闲的物理机，从而降低能耗并提高资源利用率。然而，在降低能源消耗和确保服务水平协议上建立的服务质量之间存在权衡。这项工作介绍了虚拟机整合一年进展的系统文献回顾。它讨论了虚拟机整合的每个步骤中使用的方法，