数据中心虚拟化的实践现状:更好地理解虚拟机的使用

R. Birke, Andrej Podzimek, L. Chen, E. Smirni
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引用次数: 57

摘要

硬件虚拟化是在不同租户之间共享数据中心的流行方式。在本文中,我们提出了一项大规模的工作负载特征研究,旨在更好地理解现状,即客户如何使用私有云中的数据中心,如何在使用虚拟化的不同租户之间共享物理资源,以及如何实际使用虚拟化技术。我们的研究重点是一家主要基础设施提供商的所有企业数据中心,这些数据中心在地理上分散在全球各地,并报告了在19天内观察到的使用情况。我们特别关注如何跨不同的物理资源部署虚拟机,重点是处理器和内存,关注物理资源的资源共享和使用、虚拟机生命周期以及迁移模式和频率。我们的研究表明,在过度配置资源的同时,对虚拟化带来的几种可能性(例如迁移和托管)保持保守的趋势非常明显,这显示出旨在降低数据中心运营成本的策略开发的巨大潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
State-of-the-practice in data center virtualization: Toward a better understanding of VM usage
Hardware virtualization is the prevalent way to share data centers among different tenants. In this paper we present a large scale workload characterization study that aims to a better understanding of the state-of-the-practice, i.e., how data centers in the private cloud are used by their customers, how physical resources are shared among different tenants using virtualization, and how virtualization technologies are actually employed. Our study focuses on all corporate data centers of a major infrastructure provider that are geographically dispersed across the entire globe and reports on their observed usage across a 19-day period. We especially focus on how virtual machines are deployed across different physical resources with an emphasis on processors and memory, focusing on resource sharing and usage of physical resources, virtual machine life cycles, and migration patterns and frequencies. Our study illustrates that there is a huge tendency in over provisioning resources while being conservative to the several possibilities opened up by virtualization (e.g., migration and co-location), showing tremendous potential for the development of policies aiming to reduce data center operational costs.
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