Influences on cooperation in BitTorrent communities

Andrade, Nazareno; Mowbray, Miranda; Lima, Aliandro; Wagner, Gustavo; Ripeanu, Matei

doi:10.1145/1080192.1080198

Cited by 105 publications

(97 citation statements)

References 10 publications

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“…Figure 5 shows the total number of available SET2 trackers for three weeks in July 2006 with a 10 minutes resolution. The daily pattern is confirmed by Figure 6, where the spectral density, evaluated with the unmodified periodogram method, exhibits a peak corresponding to a 1-day periodicity 8 .…”

Section: A Correlation Among Different Trackersmentioning

confidence: 61%

“…However they mainly focus on issues different from peer information availability: amount and characteristics of P2P traffic in the network [4], swarm evolution dynamics depending for example on peer arrival pattern and average connection time [5], [6], global downloading performance achievable by the peers [5], the BT-specific content sharing algorithms like the choke algorithm or the pieces selection algorithm [7] in particular as regards their effectiveness in promoting cooperation [8], [9].…”

Section: Related Workmentioning

confidence: 99%

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Availability in BitTorrent Systems

Neglia

Reina

Zhang

et al. 2007

IEEE INFOCOM 2007 - 26th IEEE International Conference on Computer Communications

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Abstract-In this paper, we investigate the problem of highly available, massive-scale file distribution in the Internet. To this end, we conduct a large-scale measurement study of BitTorrent, a popular class of systems that use swarms of actively downloading peers to assist each other in file distribution. The first generation of BitTorrent systems used a central tracker to enable coordination among peers, resulting in low availability due to the tracker's single point of failure.Our study analyzes the prevalence and impact of two recent trends to improve BitTorrent availability: (i) use of multiple trackers, and (ii) use of Distributed Hash Tables (DHTs), both of which also help to balance load better. The study considered more than 1,400 trackers and 24,000 DHT nodes (extracted from about 20,000 torrents) over a period of two months. We find that both trends improve availability, but for different and somewhat unexpected reasons. Our findings include: (i) multiple trackers improve availability, but the improvement largely comes from the choice of a single highly available tracker, (ii) such improvement is reduced by the presence of correlated failures, (iii) multiple trackers can significantly reduce the connectivity of the overlay formed by peers, (iv) the DHT improves information availability, but induces a higher response latency to peer queries.

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Section: A Correlation Among Different Trackersmentioning

confidence: 61%

Section: Related Workmentioning

confidence: 99%

Availability in BitTorrent Systems

Neglia

Reina

Zhang

et al. 2007

IEEE INFOCOM 2007 - 26th IEEE International Conference on Computer Communications

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“…Esses conteúdos tipicamente consistem de arquivos pessoais ou de terceiros, que são publicados e recuperados pelos usuários com base em seus próprios interesses (ANDRADE et al, 2005). Relatórios recentes indicaram grandes quantidades conteúdos sendo compartilhados na Internet, em especial de conteúdos multimedia, que representaram um volume representativo de tráfego entre provedores de Internet (GERBER; DOVERSPIKE, 2011).…”

Section: Appendix a Capítulo Em Portuguêsunclassified

“…These contents are typically personal files or third-party productions, which are published and downloaded by users based on their own interests (ANDRADE et al, 2005). Recent measurement reports have indicated that there is a noticeable number of content sharing activity taking place on the Internet, and that the exchange of multimedia contents accounts for an expressive traffic volume on Internet backbones (GERBER; DOVER-SPIKE, 2011).…”

Section: Introductionmentioning

confidence: 99%

Slowing down to speed up: Protecting users against massive attacks in content distribution systems

Santos

Barcellos

Gaspary

2014

2014 IEEE Network Operations and Management Symposium (NOMS)

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“…While improved performance has been observed in such communities [8,9], no policies appear to be in place to reward peers contributing more than the advertised minimum.…”

Section: Introductionmentioning

confidence: 99%

Modeling Priority-Based Incentive Policies for Peer-Assisted Content Delivery Systems

Carlsson

Eager

2008

NETWORKING 2008 Ad Hoc and Sensor Networks, Wireless Networks, Next Generation Internet

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Abstract. Content delivery providers can improve their service scalability and offload their servers by making use of content transfers among their clients. To provide peers with incentive to transfer data to other peers, protocols such as BitTorrent typically employ a tit-for-tat policy in which peers give upload preference to peers that provide the highest upload rate to them. However, the tit-for-tat policy does not provide any incentive for a peer to stay in the system beyond completion of its download. This paper presents a simple fixed-point analytic model of a priority-based incentive mechanism which provides peers with strong incentive to contribute upload bandwidth beyond their own download completion. Priority is obtained based on a peer's prior contribution to the system. Using a two-class model, we show that priority-based policies can significantly improve average download times, and that there exists a significant region of the parameter space in which both high-priority and low-priority peers experience improved performance compared to with the pure tit-for-tat approach. Our results are supported using event-based simulations.

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Influences on cooperation in BitTorrent communities

Cited by 105 publications

References 10 publications

Availability in BitTorrent Systems

Availability in BitTorrent Systems

Slowing down to speed up: Protecting users against massive attacks in content distribution systems

Modeling Priority-Based Incentive Policies for Peer-Assisted Content Delivery Systems

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