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A Practical Approach to Network Size Estimation for Structured Overlays

  • Tallat M. Shafaat
  • Ali Ghodsi
  • Seif Haridi
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5343)

Abstract

Structured overlay networks have recently received much attention due to their self-* properties under dynamic and decentralized settings. The number of nodes in an overlay fluctuates all the time due to churn. Since knowledge of the size of the overlay is a core requirement for many systems, estimating the size in a decentralized manner is a challenge taken up by recent research activities. Gossip-based Aggregation has been shown to give accurate estimates for the network size, but previous work done is highly sensitive to node failures. In this paper, we present a gossip-based aggregation-style network size estimation algorithm. We discuss shortcomings of existing aggregation-based size estimation algorithms, and give a solution that is highly robust to node failures and is adaptive to network delays. We examine our solution in various scenarios to demonstrate its effectiveness.

Keywords

Network Size Node Failure Distribute Hash Table Aggregation Algorithm Random Node 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Tallat M. Shafaat
    • 1
  • Ali Ghodsi
    • 2
  • Seif Haridi
    • 1
  1. 1.Royal Institute of Technology (KTH)School of Information and CommunicationStockholmSweden
  2. 2.Computer Systems LaboratorySwedish Institute of Computer ScienceStockholmSweden

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