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Accurate And Efficient SLA Compliance Monitoring. J. Sommers, P. Barford, N. Duffield, A. Ron Presented by Mishari Almishari. Main Contributions. Introduction of a New Active Measurement methodology to measure path characteristics Necessary for SLA Mean Delay Delay Distribution Loss Rate

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accurate and efficient sla compliance monitoring

Accurate And Efficient SLA Compliance Monitoring

J. Sommers, P. Barford, N. Duffield, A. Ron

Presented by Mishari Almishari

main contributions
Main Contributions
  • Introduction of a New Active Measurement methodology to measure path characteristics Necessary for SLA
    • Mean Delay
    • Delay Distribution
    • Loss Rate
    • Delay Variation
  • New method to infer lower bounds on delay distribution given delay measures of some paths
active measurement
Active Measurement
  • Delay
    • Use Simpson’s method: Aj, bj, Cj
    • Low error rate
    • Apply Simpson’s method to a discrete-time probe
      • Geometric distribution (with pdelay), draw k
      • Slots I, I +2(k+1), I + (K + 1)
      • Average estimates
active measurement1
Active Measurement
  • Distribution Estimation
    • Sample X1,…Xn
    • P (Xk <= X) = G(n, F(X), k)
    • Lower and upper bounds
  • Delay Variation
    • DV matrix, Rij/ Sij
    • Find Eigen Vector, and L1 of E – E’ represents Variance
  • Loss Rate
inferring lower bounds
Inferring Lower Bounds
  • Routing Matrix
  • Scalar additive Model: Xe, Yr
  • The spanning Set
  • Using Measures of the spanning paths, we can conclude lower bounds on the delay distribution of other paths
  • Boundaries..