Virtualization technology is important for servers that compose cloud data centers. The current trend is to consolidate servers to manage them easily and reduce hardware and power consumption in data centers. However, performance degradation is inherent to virtualization technology and is caused by the hypervisor and overhead due to the consolidation of several virtual servers inside a physical server. Several ways exist to virtualize a server; these methods are based mainly on virtual machines and containers. In this paper, we propose a general method to estimate the value of the consolidation overhead classes, regardless of the virtualization platform, server characteristics and workload type. We conducted several experiments in different scenarios to illustrate the usefulness of the proposed method. The results show the applicability of the proposed method and indicate that these inherent overheads are not negligible in many cases depending on, first, the type of hypervisor and, second, the hardware resources features of the physical server.

中文翻译：

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服务器整合开销的分类与量化

虚拟化技术对于组成云数据中心的服务器很重要。当前的趋势是整合服务器以轻松管理它们并降低数据中心的硬件和功耗。但是，性能下降是虚拟化技术所固有的，并且是由管理程序和由于将多个虚拟服务器整合到一个物理服务器内而导致的开销造成的。存在多种虚拟化服务器的方法；这些方法主要基于虚拟机和容器。在本文中，我们提出了一种通用方法来估计整合开销类的价值，而不管虚拟化平台、服务器特性和工作负载类型如何。我们在不同场景中进行了多次实验，以说明所提出方法的实用性。