For a torrent to be downloadable, one seeder – who has a complete copy of all the files in the torrent – must initially join the swarm so other users can download the data. Users that remain connected to a BitTorrent swarm even after they’ve downloaded the complete file, contributing more of their upload bandwidth so other people can continue to download the file, are referred to as “seeders”. Users downloading from a BitTorrent swarm are commonly referred to as “leechers” or “peers”. The tracker participates in the torrent only by keeping track of the BitTorrent clients connected to the swarm, not actually by downloading or uploading data. Importantly, BitTorrent clients never actually download files from the tracker itself. Instead, each downloader contributes upload bandwidth to other downloaders, ensuring the torrent stays fast. If 10,000 people are downloading the same file, it doesn’t put a lot of stress on a central server. This speeds up everyone’s download speed. In this way, everyone downloading a torrent is also uploading the same torrent. Once the BitTorrent client has some data, it can then begin to upload that data to other BitTorrent clients in the swarm. Once connected, a BitTorrent client downloads bits of the files in the torrent in small pieces, downloading all the data it can get. The tracker shares their IP addresses with other BitTorrent clients in the swarm, allowing them to connect to each other. The tracker is a special server that keeps track of the connected computers. The BitTorrent client contacts a “tracker” specified in the. Traditionally, a computer joins a BitTorrent swarm by loading a.
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December 2022
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