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首页> 外文期刊>Concurrency and computation: practice and experience >Performance evaluation of Web server workloads in Xen-based virtualized computer system: analytical modeling and experimental validation
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Performance evaluation of Web server workloads in Xen-based virtualized computer system: analytical modeling and experimental validation

机译：基于Xen的虚拟计算机系统中Web服务器工作负载的性能评估：分析建模和实验验证

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Recent developments in the field of virtualization technologies have led to renewed interest in performancernevaluation of these systems. Nowadays, maturity of virtualization technology has made a fussrnof provisioning IT services to maximize profits, scalability and QoS. This pioneer solution facilitatesrndeployment of datacenter applications and grid and Cloud computing services; however, there arernchallenges. It is necessary to investigate a trade-off among overall system performance and revenuernand to ensure service-level agreement of submitted workloads. Although a growing body of literaturernhas investigated virtualization overhead and virtual machines interference, there is still lack of accuraternperformance evaluation of virtualized systems. In this paper, we present in-depth performancernmeasurements to evaluate a Xen-based virtualized Web server. Regarding this experimental study;rnwe support our approach by queuing network modeling. Based on these quantitative and qualitativernanalyses, we present the results that are important for performance evaluation of consolidatedrnworkloads on Xen hypervisor. First, demands of both CPU intensive and disk intensive workloadsrnon CPU and disk are independent from the submitted rate to unprivileged domain when dedicatedrncore(s) are pinned to virtual machines. Second, request response time not only depends on processingrntime at unprivileged domain but also pertains to amount of flipped pages at Domain 0. Finally, resultsrnshow that the proposed modeling methodology performs well to predict the QoS parameters in bothrnpara-virtualized and hardware virtual machine modes by knowing the request content size.
机译：虚拟化技术领域的最新发展引起了人们对这些系统性能评估的新兴趣。如今，虚拟化技术的成熟已经为配置IT服务提供了麻烦，可以最大程度地提高利润，可扩展性和QoS。这个先驱解决方案促进了数据中心应用程序以及网格和云计算服务的部署。但是，也有种种挑战。有必要在整体系统性能和收入之间进行权衡，并确保所提交工作负载的服务水平一致。尽管越来越多的文献已经研究了虚拟化开销和虚拟机干扰，但是仍然缺乏对虚拟化系统的准确性能评估。在本文中，我们提出了深入的性能度量，以评估基于Xen的虚拟化Web服务器。关于此实验研究；我们通过对网络建模进行排队来支持我们的方法。基于这些定量和定性分析，我们提出的结果对于Xen系统管理程序上合并工作负载的性能评估非常重要。首先，当将专用内核固定到虚拟机时，CPU和磁盘密集型工作负载的需求与向非特权域提交的速率无关，而CPU和磁盘的非独立性。其次，请求响应时间不仅取决于非特权域上的处理时间，而且还涉及域0上的翻页量。最后，结果表明，所提出的建模方法可以很好地预测虚拟机和硬件虚拟机模式下的QoS参数，方法是：知道请求内容的大小。

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