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39 lines
1.4 KiB
Markdown
39 lines
1.4 KiB
Markdown
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# Economics of BitTorrent communities
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## Authors
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- Ian A. Kash - iankash@microsoft.com
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- John K. Lai - jklai@seas.harvard.edu
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- Haoqi Zhang - hq@eecs.harvard.edu
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- Aviv Zohar - avivz@microsoft.com
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### DOI
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- https://doi.org/10.1145/2187836.2187867
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## Summary
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The paper is a study of a BitTorrent community called DIME, where users share live concert recordings. The community has around 100K users and the study analyses data gathered over 6 months.
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### Main ideas
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* The DIME system enforces a ratio of at least 0.25: 4 downloads for 1 upload
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* Many users have a ratio above 1 (which shows an altruistic behaviour)
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* New files are more attractive to users and have high demand at the beginning
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* Users with high bandwidth Internet connections take advantage of new files to take credits
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* Old files are no good to gain credit because they are not in high demand
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* There are periods where downloads are free
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* Users prefer to download old files during free periods
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### Observations
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* The paper does not give any numbers about the amount of data available in total
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* The paper does not provide data about the file size distribution
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* Overall the paper provides interesting data about how sharing communities behave but no data about the decentralized storage itself.
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### Other ideas
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* Some aspects of the demand for files with respect to their life could be applied to other decentralized storage systems
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