what-when-how
In Depth Tutorials and Information
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AS popularity
[1,165469] mean=1748.4, median=38, std=8863.9
Exponential
a=1.221e+005, b=−0.1102, c=4.173e+004, d=−0.0145
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Figure6.27
ASpopularityofexistingvideoBTtorrents.
6.3.4 Possible Small-World Enhancement
In Section 1.3, we found no evidence of persistent clustering in any of the four
BitTorrent networks we studied, and therefore no small-world networks are pos-
sible. It is known that small-world networks are efficient for spreading information
[21,14,13]. A previous study [22] has also conjectured that BitTorrent's efficiency
partly comes from the clustering of peers.
It is thus interesting to see whether BitTorrent networks can be made to cluster
while maintaining a short characteristic path length, and so become small-world.
We proposed a possible enhancement toward this direction through both theory
and practical implementation. We also presented a theoretical attempt at increasing
the small-world characteristics of BitTorrent networks.
6.4 ContentLocality:TheInter-TorrentLevelExamination
Finally, we move to the inter-torrent level and focus on the locality in torrents. he
pioneer work of T. Karagiannis et al. [20] is the first study to address the locality
issues in P2P systems. Aiming to solve the inter-ISP traffic problem, the authors
