![]() In order to prevent the last pieces becoming unobtainable, BitTorrent clients attempt to get the last missing pieces from all of its peers. This is because the faster and more easily accessible pieces should have already been obtained. In typical client operation the last download pieces arrive more slowly than the others. Endgame / Endgame mode Any applied algorithm for downloading the last few pieces (see below) of a torrent. Bram prefers downloader to leech because BitTorrent's tit-for-tat ensures downloaders also upload and thus do not unfairly qualify as leeches. This term, used in Bram Cohen's Python implementation, lacks the negative connotation attributed to leech. Downloader A downloader is any peer that does not have the entire file and is downloading the file. Distributed Hash Table Distributed Hash Tables (DHT) are used in Bittorrent for peers to send a list of other seeds/peers in the swarm for a particular torrent directly to a client without the need for a tracker. The second client has been blacklisted for being abusive or is using a blacklisted BitTorrent client.Ĭlient The program that enables peer-to-peer file sharing via the BitTorrent protocol.The client is already uploading at its full capacity (it has reached the value of max_uploads).The second client is a seed, in which case it does not want any pieces (i.e., it is completely uninterested). ![]() A client chokes another client in several situations: Choked Describes a peer to which the client refuses to send file pieces. So if the availability is 1.6, the distributed copies will be 0.6 because it is only counting the "copies" of the file. Sometimes "distributed copies" is considered to be "availability minus 1". However, if two peers both have the same portion of the file downloaded - say 50% - and there is only one seeder, the availability is 1.5. Example: a peer with 65.3% of the file downloaded increases the availability by 0.653. A connected peer with a fraction of the file available adds that fraction to the availability, if no other peer has this part of the file. Each seed adds 1.0 to this number, as they have one complete copy of the file. Availability (Also known as distributed copies.) The number of full copies of a file (or set of files and directories) directly available to the client.
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