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Vivaldi: A Decentralized Network Coordinate System

Vivaldi: A Decentralized Network Coordinate System. F. Dabek, R. Cox, F. Kaashoek, R. Morris MIT CSAIL Presenter: Matthew Allen. Motivation. ∑∑ (L ij - ║x i - x j ║) 2. i. j. X rest = 5. X stretch = 8. (X rest – X stretch ) 2 = 9. Spring Analogy. SE= (L ij - ║x i - x j ║) 2.

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Vivaldi: A Decentralized Network Coordinate System

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  1. Vivaldi: A Decentralized Network Coordinate System F. Dabek, R. Cox, F. Kaashoek, R. Morris MIT CSAIL Presenter: Matthew Allen

  2. Motivation

  3. ∑∑(Lij - ║xi - xj║)2 i j Xrest = 5 Xstretch = 8 (Xrest – Xstretch)2 = 9 Spring Analogy SE= (Lij - ║xi - xj║)2

  4. xi+1 = δ*∑((RTT-║xi-xj║)*u(xi–xj)) j Iterative Adjustment

  5. xi+1 = δ*∑((RTT-║xi-xj║)*u(xi–xj)) j Iterative Adjustment

  6. xi+1 = δ*∑((RTT-║xi-xj║)*u(xi–xj)) j Iterative Adjustment

  7. xi+1 = δ*∑((RTT-║xi-xj║)*u(xi–xj)) j Iterative Adjustment

  8. xi+1 = δ*∑((RTT-║xi-xj║)*u(xi–xj)) j Iterative Adjustment local error δ = cc * local error + remote error

  9. Effects of δ on Convergence

  10. Effects of δ on Stability

  11. Triangle Inequalities

  12. Height

  13. The End

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