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Improving Network I/O Virtualization for Cloud Computing

机译：改善云计算的网络I / O虚拟化

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摘要

Virtualization is a key technology to enable cloud computing. It enhances resource availability and offers high flexibility and cost effectiveness. However, the driver domain-based model for network I/O virtualization exhibit poor networking performance. In this paper, we evaluate the networking performance of VMs based on Xen. The I/O channel transferring packets between the driver domain and the VMs is shown to be the bottleneck. To overcome this limitation, we proposed a packet aggregation-based mechanism to transfer packets from the driver domain to the VM. Experimental performance evaluation showed that our proposal allows the VMs throughput to scale up at line rates. Furthermore, we studied the impact of the aggregation on the packets delay. For this purpose, we proposed a system modeling based on queuing theory. The proposed model allowed us to dynamically tune the aggregation mechanism to achieve the best tradeoff between the packets delay and throughput. The proposed I/O virtualization model henceforth satisfies the infrastructure providers to offer cloud computing services.
机译：虚拟化是实现云计算的关键技术。它提高了资源可用性，并提供了高度的灵活性和成本效益。但是，用于网络I / O虚拟化的基于驱动程序域的模型显示出较差的网络性能。在本文中，我们评估了基于Xen的VM的网络性能。在驱动程序域和VM之间传输数据包的I / O通道显示为瓶颈。为了克服此限制，我们提出了一种基于数据包聚合的机制，将数据包从驱动程序域传输到VM。实验性能评估表明，我们的建议允许VM的吞吐量按线速扩展。此外，我们研究了聚合对数据包延迟的影响。为此，我们提出了基于排队论的系统建模。提出的模型使我们能够动态调整聚合机制，以在数据包延迟和吞吐量之间实现最佳平衡。此后，提议的I / O虚拟化模型满足了提供云计算服务的基础架构提供商的要求。

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