Robust Lifetime Measurement in Large-Scale P2P Systems with Non-Stationary Arrivals Conference Paper uri icon

abstract

  • Characterizing user churn has become an important topic in studying P2P networks, both in theoretical analysis and system design. Recent work [26] has shown that direct sampling of user lifetimes may lead to certain bias (arising from missed peers and round-off inconsistencies) and proposed a technique that estimates lifetimes based on sampled residuals. In this paper, however, we show that under non-stationary arrivals, which are often present in real systems, residual-based sampling does not correctly reconstruct user lifetimes and suffers a varying degree of bias, which in some cases makes estimation completely impossible. We overcome this problem using two contributions: a novel non-stationary ON/OFF churn model and an unbiased randomized residual sampling technique for measuring user lifetimes. The former allows correlation between ON/OFF periods of the same user and exhibits different join rates during the day. The latter spreads sampling points uniformly during the day and uses a novel estimator to reconstruct the underlying lifetime distribution. We finish the paper with experimental measurements of Gnutella and discussing reduction in overhead compared to direct sampling methods. 2009 IEEE.

name of conference

  • 2009 IEEE Ninth International Conference on Peer-to-Peer Computing

published proceedings

  • 2009 IEEE Ninth International Conference on Peer-to-Peer Computing

author list (cited authors)

  • Wang, X., Yao, Z., Zhang, Y., & Loguinov, D.

citation count

  • 5

complete list of authors

  • Wang, Xiaoming||Yao, Zhongmei||Zhang, Yueping||Loguinov, Dmitri

editor list (cited editors)

  • Schulzrinne, H., Aberer, K., & Datta, A.

publication date

  • January 2009