Sliding Mode Congestion Control for data center Ethernet networks
Sliding Mode Congestion Control for data center Ethernet networks
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DOI：
10.1109/infcom.2012.6195505
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发表时间：
2012-03
期刊：
影响因子：
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通讯作者：
Wanchun Jiang;Fengyuan Ren;Ran Shu;Chuang Lin
中科院分区：
文献类型：
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作者：
Wanchun Jiang;Fengyuan Ren;Ran Shu;Chuang Lin
近年来，以太网作为数据中心的统一交换结构正在得到加强，称为数据中心以太网。端到端拥塞管理是其中一个不可或缺的增强功能，量化拥塞通知（QCN）已被批准为标准。实验表明，QCN在瓶颈链路处存在队列振荡现象。随着系统参数和网络结构的变化，这种振荡可能会变得非常严重，以致于队列经常被清空。结果，瓶颈链路的利用率降低。理论分析表明，QCN主要通过滑模运动接近平衡点。但QCN是否进入滑模运动还取决于系统参数和网络配置。因此，我们提出了滑模拥塞控制（SMCC）计划，它可以驱动系统进入滑模运动在任何条件下。SMCC的优点在于滑模运动对系统参数和外部干扰不敏感。此外，SMCC具有简单、稳定和响应时间短的优点。QCN可以很容易地被SMCC取代，因为它们都遵循IEEE 802.1 Qau工作组开发的框架。在NetFPGA平台上进行的实验表明，SMCC比QCN具有上级的性能，特别是在业务模式和网络状态变化的情况下。
Recently, Ethernet is being enhanced as the unified switch fabric of data centers, called Data Center Ethernet. The end-to-end congestion management is one of the indispensable enhancements, and Quantized Congestion Notification (QCN) has been ratified to be the standard. Our experiments show that QCN suffers from the oscillation of the queue at the bottleneck link. With the changes of system parameters and network configurations, the oscillation may become so serious that the queue is emptied frequently. As a result, the utilization of the bottleneck link degrades. Theoretical analysis shows that QCN approaches to the equilibrium point mainly through the sliding mode motion. But whether QCN enters into the sliding mode motion also depends on both system parameters and network configurations. Hence, we present the Sliding Mode Congestion Control (SMCC) scheme, which can drive the system into the sliding mode motion under any conditions. SMCC benefits from the advantage that the sliding mode motion is insensitive to system parameters and external disturbances. Moreover, SMCC is simple, stable and has short response time. QCN can be replaced by SMCC easily since both of them follow the framework developed by the IEEE 802.1 Qau work group. Experiments on the NetFPGA platform show that SMCC is superior to QCN, especially in the condition that the traffic pattern and the network state are variable.