BitTorrent—what's left of the company, at least—announced a deal with Israeli content delivery firm Oversi to reduce the demand that P2P applications place on networks. The plan, which is meant to complement similar work from the P4P working group and IETF, "intelligently" directs BitTorrent requests to the best peers.
The continuing efforts in this area from both P2P developers and ISPs like Comcast are an encouraging sign that detente can be reached in the P2P wars, at least when it comes to bandwidth concerns. Both P4P and the new Oversi announcement claim to boost download speeds for users while reducing the (expensive) traffic that leaves an ISP's own network to traverse the Internet.
The current arrangement uses new Policy Discover Protocols from BitTorrent in order to query ISP capabilities and network architecture information. The information is shared with Oversi's NetEnhancer box, which is designed to "improve peer selection" in a way that's appropriate to the ISP in question, usually by directing requests to local network peers first.
P4P uses the same approach, relying on ISP-deployed "iTrackers" to provide this kind of information to local P2P clients. The benefits aren't just theoretical; Comcast recently announced the results of a real-world P4P trial in which it saw better performance, far less traffic leaving the network, and no significant increase in upload congestion (a serious worry, especially for cable ISPs).
Directing P2P downloads to local peers may boost download speeds and reduce traffic at a network transit point, but the worry has always been that it would substantially increase uploads within the network. Comcast found that, because so many people were uploading regardless of what Comcast did, directing P2P requests to local machines had little overall effect.