A Statistical Theory of Chord under Churn

Krishnamurthy, Supriya and El-Ansary, Sameh and Aurell, Erik and Haridi, Seif (2005) A Statistical Theory of Chord under Churn. In: The 4th Annual International Workshop on Peer-To-Peer Systems (IPTPS 05), Feb 2005, Ithaca, NY, USA.



Most earlier studies of DHTs under churn have either depended on simulations as the primary investigation tool, or on establishing bounds for DHTs to function. In this paper, we present a complete analytical study of churn using a master-equation-based approach, used traditionally in non-equilibrium statistical mechanics to describe steady-state or transient phenomena. Simulations are used to verify all theoretical predictions. We demonstrate the application of our methodology to the Chord system. For any rate of churn and stabilization rates, and any system size, we accurately predict the fraction of failed or incorrect successor and finger pointers and show how we can use these quantities to predict the performance and consistency of lookups under churn. We also discuss briefly how churn may actually be of different 'types' and the implications this will have for the functioning of DHTs in general.

Item Type:Conference or Workshop Item (Paper)
ID Code:240
Deposited By:DSL Researcher
Deposited On:26 Jan 2006
Last Modified:18 Nov 2009 15:55

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