A Statistical Theory of Chord Under Churn

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A Statistical Theory of Chord Under Churn
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 nonequilibrium 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.
Supriya Krishnamurthy, Sameh El-Ansary, Erik Aurel
Added 27 Jun 2010
Updated 27 Jun 2010
Type Conference
Year 2005
Authors Supriya Krishnamurthy, Sameh El-Ansary, Erik Aurell, Seif Haridi
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