How torrenting works

How torrenting works


  • A user who wants to upload a file first creates a small torrent descriptor file that they distribute to other users by conventional means.
  • They then make the file itself available through a BitTorrent node acting as a seed.
  • Those with the torrent descriptor file can give it to their own BitTorrent nodes which, acting as peers or leechers, download it by connecting to the seed and/or other peers.
  • The file being distributed is divided into segments called pieces. As each peer receives a new piece of the file it becomes a source (of that piece) for other peers, relieving the original seed from having to send that piece to every computer or user wishing a copy.
  • Pieces are typically downloaded non-sequentially and are rearranged into the correct order by the BitTorrent Client, which monitors which pieces it needs, and which pieces it has and can upload to other peers.
  • Pieces are of the same size throughout a single download (for example a 10 MB file may be transmitted as ten 1 MB Pieces or as forty 256 KB Pieces). Due to the nature of this approach, the download of any file can be halted at any time and be resumed at a later date, without the loss of previously downloaded information,
  • When a peer completely downloads a file, it becomes an additional seed.


Disclaimer :

I have not written a single word of the above lines. I copied them from the blog of Colt McAnlisLink to original Article

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