performance evaluation of virtualization technologies for server consolidation

Performance evaluation of virtualization technologies for server consolidation

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Performance Evaluation of Virtualization Technologies for Server Consolidation Pradeep Padala, Xiaoyun Zhu, Zhikui Wang, Sharad Singhal, Kang G. Shin Enterprise Systems and Software Laboratory HP Laboratories Palo Alto HPL-2007-59 April 11, 2007* server consolidation, virtualization, multi-tier application, performance, overhead Server consolidation has become an integral part of IT planning to reduce cost and improve efficiency in today’s enterprise data centers. The advent of virtualization allows consolidation of multiple applications into virtual containers hosted on a single or multiple physical servers. However, this poses new challenges, including choosing the right virtualization technology and consolidation configuration for a particular set of applications. In this paper, we evaluate two representative virtualization technologies, Xen and OpenVZ, in various configurations. We consolidate one or more multi-tiered systems onto one or two nodes and drive the system with an auction workload called RUBiS. We compare both technologies with a base system in terms of application performance, resource consumption, scalability, low-level system metrics like cache misses and virtualization-specific metrics like Domain-0 consumption in Xen. Our experiments indicate that the average response time can increase by over 400% in Xen and only a modest 100% in OpenVZ as the number of application instances grows from one to four. This large discrepancy is caused by the higher virtualization overhead in Xen, which is likely due to higher L2 cache misses and misses per instruction. A similar trend is observed in CPU consumptions of virtual containers. We present an overhead analysis with kernel-symbol-specific information generated by Oprofile. * Internal Accession Date Only Approved for External Publication © Copyright 2007 Hewlett-Packard Development Company, L.P.
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Performance Evaluation of Virtualization Technologies for Server Consolidation Pradeep Padala 1 , Xiaoyun Zhu 2 , Zhikui Wang 2 , Sharad Singhal 2 , and Kang G. Shin 1 1 University of Michigan 2 Hewlett Packard Laboratories Abstract Server consolidation has become an integral part of IT planning to reduce cost and improve efficiency in to- day’s enterprise data centers. The advent of virtualiza- tion allows consolidation of multiple applications into virtual containers hosted on a single or multiple physical servers. However, this poses new challenges, including choosing the right virtualization technology and consol- idation configuration for a particular set of applications. In this paper, we evaluate two representative virtualiza- tion technologies, Xen and OpenVZ, in various configu- rations. We consolidate one or more multi-tiered systems onto one or two nodes and drive the system with an auc- tion workload called RUBiS. We compare both technolo- gies with a base system in terms of application perfor- mance, resource consumption, scalability, low-level sys- tem metrics like cache misses and virtualization-specific
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This note was uploaded on 12/01/2011 for the course EE 5373 taught by Professor Chao during the Spring '11 term at NYU Poly.

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Performance evaluation of virtualization technologies for server consolidation

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