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