Shooting for a higher ratio would result in very little uploading even in some conditions where it makes sense to do so, which was extremely confusing to users in testing and is a waste of resources. We selected a 2:1 ratio because it’s impossible to have a number of interested peers between 1 and 2, and 1 is too small, so that left 2 as a logical choice. This is especially helpful in conditions where there are already plenty of seeds, which often happens after a torrent has been available for a while.
#BLUE VS GREEN SEEDING UTORRENT DOWNLOAD#
This can help other peers download faster or ensure a peer has a good sharing ratio. The intended use of Altruistic Mode is to help out a swarm. Why would you want to do this? BitTorrent explains the purpose of this mode and how it chose the ratio: Thus, Altruistic Mode downloads will often never complete. Because BitTorrent peers upload as much as they can under normal conditions, the only way to improve the ratio is by downloading less. If there is only one interested peer, Altruistic Mode stops downloading, because it can’t uphold the ratio. Put another way, Altruistic Mode downloads if there are two peers who are interested, because for each new downloaded piece, it can upload to two peers. Altruistic Mode guarantees that your upload to download ratio is never much less than 2 to 1.
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