TorrentFreak

• Ernesto
• March 2, 2011
• 117
• bitmate,
  research
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BitTorrent is an excellent tool for sharing large files online, which is why millions of people use it every day. In developing third world countries, however, BitTorrent usage falls far behind, mainly because the transfer speeds are not that great on low bandwidth connections. Thanks to a new BitTorrent client, funded by a grant from the U.S. State Department, this situation can look forward to positive change.

A few days ago a new BitTorrent client surfaced under the promising name BitMate. The client is developed by a group of researchers from several well respected universities who have collaborated to improve the lives of BitTorrent aficionados in developing countries.

The aim of BitMate is to drastically improve the download speeds of peers on low-bandwidth connection (5 to 20 KB/sec), to make BitTorrent more effective in places where people might need it the most. If we believe the claims of the researchers, they have succeeded in making a difference.

TorrentFreak contacted Dr.Umar Saif, Associate Professor and leader of the initiative, to learn more about the new BitTorrent client.

“We have spent close to 2 years experimenting with various tweaks in BitTorrent, using both real-world and synthetic swarms. BitMate is our first public release and is an ongoing project,” Saif said.

During the latest tests the researchers found that compared to traditional clients, the download speeds on low bandwith connections can receive up to a 70% boost with BitMate, while upload contributions may improve by up to 1000%.

“In our target conditions, Bitmate can almost double the download performance. At the same time, it performs at least as well as the traditional BitTorrent clients for high-bandwidth peers,” Saif noted.

The beauty of it all, is that other peers are not negatively affected by these improvements.

“BitMate enhances the performance of low-bandwidth nodes without cheating, circumventing the fairness policy of BitTorrent or adversely affecting the performance of other peers,” Saif told TorrentFreak.

Among other things, BitMate can establish this advantage by prioritizing connections to other slow peers, by minimizing cross-ISP traffic and by avoiding redundant downloads. Combined with several other optimizations, the Vuze-based BitMate client is able to speed up downloads on slow connections.

“Instead of wasting optimistic unchokes on high bandwidth peers, a BitMate client optimistically unchokes those peers that have a similar low-bandwidth. As a result, a BitMate client invests its scarce upload bandwidth on peers that are most likely to reciprocate.”

“At the same time, BiTMate leaves the tit-for-tat reciprocal unchoke policy untouched to uphold the fairness of BitTorrent. This leads to both increased performance and fairness since low-bandwidth clients can quickly form mutually beneficial peer-to-peer connections,” Saif said.

A win-win situation for all BitTorrent users, generously funded by the U.S. State Department. It’s almost too good to be true.

BitMate’s latest version was released to the public three days ago and can be downloaded for free. The source code of BitMate is available at GitHub. Although the project is aimed at developing countries, there are plenty of people in other parts of the world that are on a slow connection, and might benefit from BitMate.

A few days ago a new BitTorrent client surfaced under the promising name BitMate. The client is developed by a group of researchers from several well respected universities who have...