With the rapid development of virtualization techniques, cloud data centers allow for cost-effective, flexible, and customizable deployments of applications on virtualized infrastructure. Virtual machine (VM) placement aims to assign each virtual machine to a server in the cloud environment. VM Placement is of paramount importance to the design of cloud data centers. Typically, VM placement involves complex relations and multiple design factors as well as local policies that govern the assignment decisions. It also involves different constituents including cloud administrators and customers that might have disparate preferences while opting for a placement solution. Thus, it is often valuable to return not only an optimized solution to the VM placement problem but also a solution that reflects the given preferences of the constituents. In this article, we provide a detailed review on the role of preferences in the recent literature on VM placement. We examine different preference representations found in the literature, explain their existing usage, and explain the adopted solving approaches. We further discuss key challenges and identify possible research opportunities to better incorporate preferences within the context of VM placement.

中文翻译：

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云数据中心虚拟机放置偏好使用调查

随着虚拟化技术的快速发展，云数据中心允许在虚拟化基础架构上经济高效、灵活且可定制地部署应用程序。虚拟机 (VM) 放置旨在将每个虚拟机分配给云环境中的服务器。虚拟机放置对于云数据中心的设计至关重要。通常，VM 放置涉及复杂的关系和多个设计因素以及管理分配决策的本地策略。它还涉及不同的组成部分，包括云管理员和在选择放置解决方案时可能有不同偏好的客户。因此，不仅返回对 VM 放置问题的优化解决方案，而且返回反映组成部分给定偏好的解决方案通常很有价值。在本文中，我们详细回顾了最近有关 VM 放置的文献中偏好的作用。我们检查文献中发现的不同偏好表示，解释它们的现有用法，并解释采用的解决方法。我们进一步讨论了关键挑战并确定了可能的研究机会，以更好地将偏好纳入 VM 放置的背景中。