Improving Fairness of Quantized Congestion Notification for Data Center Ethernet Networks
Improving Fairness of Quantized Congestion Notification for Data Center Ethernet Networks
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DOI：
10.1109/icdcsw.2011.15
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发表时间：
2011-06
期刊：
影响因子：
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通讯作者：
Yuki Hayashi;Hayato Itsumi;M. Yamamoto
中科院分区：
文献类型：
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作者：
Yuki Hayashi;Hayato Itsumi;M. Yamamoto
在大型数据中心中，实现了两种类型的网络：局域网（LAN）和存储区域网（SAN）。为了实现简单的网络管理，通过以太网技术集成这两个网络是非常感兴趣的。SAN需要非常低的帧丢失率。为了集成局域网和SAN，通常使用多跳以太网配置，并且在流量热点可能发生拥塞。因此，现在在IEEE 802.1Qau中讨论防止多跳以太网中的帧丢失的第2层拥塞控制，量化拥塞通知（QCN）。在本文中，我们评估QCN的吞吐量性能，并揭示了一个技术问题，活跃的流之间的公平性。我们还提出了增强QCN的速率增加原则，并证明它提高了公平性。
In large-scale data centers, two types of network are implemented: local area networks (LANs) and storage area networks (SANs). To achieve simple network management, integration of these two networks by Ethernet technology is of great interest. A SAN requires a significantly low frame loss rate. To integrate LANs and SANs, a multi-hop Ethernet configuration is generally used, and congestion may occur in traffic hot spots. Therefore, layer-2 congestion control that prevents frame loss in multi-hop Ethernet, Quantized Congestion Notification (QCN), is now discussed in IEEE 802.1Qau. In this paper, we evaluate QCN's throughput performance and reveal a technical problem with fairness among active flows. We also propose an enhancement of QCN's rate increase principle and demonstrate that it improves fairness.