Enhancing peer-to-peer traffic locality through selective tracker blocking

Haiyang Wang, Feng Wang, Jiangchuan Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


Peer-to-peer (P2P) applications, most notably BitTorrent (BT), are generating unprecedented traffic pressure to the Internet Service Providers (ISPs). To mitigate the costly inter-ISP traffic, P2P locality, which explores and promotes local peer connections, has been widely suggested. Unfortunately, existing proposals generally require that an ISP control the neighbor selection of most peers, which is often not practical in a real-world deployment given there are noncooperative trackers. In this paper, for the first time, we examine the characteristics and the impacts of these noncooperative trackers through real-world measurements. We find that tracker blocking has the potential to address this noncooperation problem, and help the ISPs to control more peers for traffic locality. Yet, how to guarantee torrents' availability at the same time remains a significant challenge for the ISPs. To this end, we model the tracker blocking problem coherently with torrent's availability, and address it through a novel selective tracker blocking algorithm, which iteratively improves traffic locality with a given availability threshold. Our trace-driven evaluation shows that our solution successfully reduces the cross-ISP traffic in the presence of noncooperative trackers and yet with minimal impact to torrents' availability.

Original languageEnglish (US)
Title of host publicationNETWORKING 2011 - 10th International IFIP TC 6 Networking Conference, Proceedings
Number of pages12
EditionPART 2
StatePublished - 2011
Event10th International IFIP TC 6 Networking Conference, NETWORKING 2011 - Valencia, Spain
Duration: May 9 2011May 13 2011

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
NumberPART 2
Volume6641 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Other10th International IFIP TC 6 Networking Conference, NETWORKING 2011


  • BitTorrent
  • Locality
  • Peer control
  • Tracker blocking


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