Where is my peer ? Evaluation of the Vivaldi network coordinate system in Azureus
Networking 2009, 8th IFIP International Conference on Networking, May 11-15, 2009, Aachen, Germany, also published in "Lecture Notes in Computer Science", Volume 5550/2009
Network coordinates allow to estimate the latency among a large number of hosts in a scalable way. Recently, Azureus, a popular implementation of BitTorrent, has implemented network coordinates.We have developed a crawler that allows us to obtain from the network coordinates over one hundred thousand peers running Azureus and to measure the network and application level round trip times to these peers. Our measurements confirm that network coordinates allow to correctly estimate the round trip time between two peers. Our measurements also show that the round trip times from our crawling host to a set of peers located in the same country can vary between a few tens of milliseconds to more than one second. This high variance is due to the large buffers in the ADSL access links, which can increase the round trip time by hundreds of milliseconds. As a consequence, network coordinates and round trip estimations in general cannot be used to select peers that are “nearby”, such as peers connected to the same ISP or located in the same country.
| Mots Clés: | peer-to-peer, measurement, network coordinate system |
| Type: | Conférence |
| Langue: | English |
| Ville: | Aachen |
| Pays: | ALLEMAGNE |
| Date: | Mai 2009 |
| Département: | Réseaux et Sécurité |
| Eurecom ref: | 2711 |
| Copyright: | © Springer. Personal use of this material is permitted. The definitive version of this paper was published in Networking 2009, 8th IFIP International Conference on Networking, May 11-15, 2009, Aachen, Germany, also published in "Lecture Notes in Computer Science", Volume 5550/2009 and is available at : http://dx.doi.org/10.1007/978-3-642-01399-7_12 |
| Bibtex: | @inproceedings{EURECOM+2711, doi = {http://dx.doi.org/10.1007/978-3-642-01399-7_12}, year = {2009}, title = {{W}here is my peer ? {E}valuation of the {V}ivaldi network coordinate system in {A}zureus}, author = {{S}teiner, {M}oritz and {B}iersack, {E}rnst {W}}, booktitle = {{N}etworking 2009, 8th {IFIP} {I}nternational {C}onference on {N}etworking, {M}ay 11-15, 2009, {A}achen, {G}ermany, also published in "{L}ecture {N}otes in {C}omputer {S}cience", {V}olume 5550/2009}, address = {{A}achen, {ALLEMAGNE}}, month = {05}, url = {http://www.eurecom.fr/publication/2711} } |
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