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Dynamic Discovery of Resources in Structured P2P Systems

Author Affiliations

  • 1Computer Engineering Department, University of Zabol, Zabol, IRAN
  • 2 Computer Engineering Department, School of Eng., I.A.U. Zabol Branch, Zabol, IRAN

Res. J. Recent Sci., Volume 4, Issue (12), Pages 95-105, December,2 (2015)

Abstract

A distributed system is a collection of autonomous computers that appear to their user as one single coherent system. The main goal of any distributed system is sharing resources in a controlled and efficient way. But before any resources can be shared, they should be located. Structured peer-to-peer (P2P) systems have been recognized as an efficient approach to solve the resource locating and discovery problem in large-scale dynamic distributed systems. Efficiency of structured P2Presource discovery approaches attributed to their structured property. However, system dynamism (a.k.a. Churn) caused by changes in the system membership, i.e., nodes that join or leave the system or simply fail, perturbs the structure of the system and endangers the expected correctness and efficiency of resource discovery solutions. In this paper we propose an approach to dynamic searching and discovery of resources that adapts its operation dynamically with the dynamism in the system by using a structure maintenance technique that we have already presented in our recent paper. Although our approach is general enough to be applied to a lot of structured P2P systems, for the sake of brevity here we implemented this resource discovery approach for a well-known structured P2P system called Chord. We analyzed the efficiency of our presented resource discovery mechanism using master equation approach of physics and by experiments. We see how the simulation results and theoretical analyses both show the improved efficiency of our resource searching and discovery mechanisms.

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