TY - GEN
T1 - Understanding peer exchange in BitTorrent systems
AU - Wu, Di
AU - Dhungel, Prithula
AU - Hei, Xiaojun
AU - Zhang, Chao
AU - Ross, Keith W.
N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2010
Y1 - 2010
N2 - Peer Exchange (PEX), in which peers directly exchange with each other lists of active peers in the torrent, has been widely implemented in modern BitTorrent clients for decentralized peer discovery. However, there is little knowledge about the behavior of PEX in operational systems. In this paper, we perform both passive measurements and Planetlab experiments to study the impact and properties of BitTorrent PEX.We first study the impact of PEX on the download efficiency of BitTorrent. We observe that PEX can significantly reduce the download time for some torrents. We then analyze the freshness, redundancy and spread speed of PEX messages. Finally, we also conduct large-scale Planetlab experiments to understand the impact of PEX on the overlay properties of BitTorrent.
AB - Peer Exchange (PEX), in which peers directly exchange with each other lists of active peers in the torrent, has been widely implemented in modern BitTorrent clients for decentralized peer discovery. However, there is little knowledge about the behavior of PEX in operational systems. In this paper, we perform both passive measurements and Planetlab experiments to study the impact and properties of BitTorrent PEX.We first study the impact of PEX on the download efficiency of BitTorrent. We observe that PEX can significantly reduce the download time for some torrents. We then analyze the freshness, redundancy and spread speed of PEX messages. Finally, we also conduct large-scale Planetlab experiments to understand the impact of PEX on the overlay properties of BitTorrent.
KW - BitTorrent
KW - Measurement
KW - Peer exchange
UR - http://www.scopus.com/inward/record.url?scp=78349299818&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78349299818&partnerID=8YFLogxK
U2 - 10.1109/P2P.2010.5569967
DO - 10.1109/P2P.2010.5569967
M3 - Conference contribution
AN - SCOPUS:78349299818
SN - 9781424471416
T3 - 2010 IEEE 10th International Conference on Peer-to-Peer Computing, P2P 2010 - Proceedings
BT - 2010 IEEE 10th International Conference on Peer-to-Peer Computing, P2P 2010 - Proceedings
T2 - 2010 IEEE 10th International Conference on Peer-to-Peer Computing, P2P 2010
Y2 - 25 August 2010 through 27 August 2010
ER -