Fast Download but Eternal Seeding: The Reward and Punishment of Sharing Ratio Enforcement

Many private BitTorrent communities employ Sharing Ratio Enforcement (SRE) schemes to incentivize users to contribute their upload resources. It has been demonstrated that communities that use SRE are greatly oversupplied, i.e., they have much higher seeder-to-leecher ratios than communities in which SRE is not employed. The first order effect...

Systemic risk and user-level performance in private P2P communities

Many peer-to-peer communities, including private BitTorrent Communities that serve hundreds of thousands of users, utilize<br/>credit-based or sharing ratio enforcement schemes to incentivize their members to contribute. In this paper, we analyze the performance<br/>of such communities from both the system-level and the user-level perspectives....