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are only to the tracker, yet we have introduced these small-world characteristics into
all four of the BitTorrent networks we considered.
In regards to the locality issues, we have studied the existing video BT torrent.
We for the first time examined the problem through a large-scale Internet-based
measurement and especially focused on different peer features. According to our
measurement results, a global locality approach may not be our best choice. Peers in
the large AS clusters are of the most importance during the locality optimization.
Based on the relationships of different ASes, a possible peer prediction approach is
discussed to serve our selective locality mechanism.
A distinguishing feature of our study in comparison to previous works is the
focus on real-world measurement and low-level features such as peer and content
diversities. he diferent AS relationships are also proposed for the irst time from
the BitTorrent point of view. Meanwhile, one of its limitations is that a large mount
of data is needed to infer such a relationship. he accuracy of this approach should
also be further examined by the real-world deployment.
References
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Overlay. Technical Report, INRIA, 2007.
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