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SIGMETRICS
2011
ACM

Stability analysis of QCN: the averaging principle

8 years 2 months ago
Stability analysis of QCN: the averaging principle
Data Center Networks have recently caused much excitement in the industry and in the research community. They represent the convergence of networking, storage, computing and virtualization. This paper is concerned with the Quantized Congestion Notification (QCN) algorithm, developed for Layer 2 congestion management. QCN has recently been standardized as the IEEE 802.1Qau Ethernet Congestion Notification standard. We provide a stability analysis of QCN, especially in terms of its ability to utilize high capacity links in the shallowbuffered data center network environment. After a brief description of the QCN algorithm, we develop a delay-differential equation model for mathematically characterizing it. We analyze the model using a linearized approximation, obtaining stability margins as a function of algorithm parameters and network operating conditions. A second contribution of the paper is the articulation and analysis of the Averaging Principle (AP)—a new method for stabiliz...
Mohammad Alizadeh, Abdul Kabbani, Berk Atikoglu, B
Added 17 Sep 2011
Updated 17 Sep 2011
Type Journal
Year 2011
Where SIGMETRICS
Authors Mohammad Alizadeh, Abdul Kabbani, Berk Atikoglu, Balaji Prabhakar
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