Torrent client designed for seeding tens of thousands of torrents.

Gamayun

This project is currently a prototype. It is not usable in any shape or form.

One day, this will be an efficient BitTorrent client, handling large amounts of torrents, optimized for long-term seeding.

Owner
Dominik Honnef
Long-time Go user, contributor, and author of many Go related tools, including Staticcheck.
Dominik Honnef
https://github.com/dominikh/gamayun
Comments
  • Allow flexible mapping between files in a torrent and files on the file system

    Allow flexible mapping between files in a torrent and files on the file system

    Allow specifying per-file where to download to/seed from. For a single torrent file with the files a/a.ext and a/b.ext, it should be possible to back them with /whatever/cool.ext and /somewhere_else/not_so_cool.ext. This mapping should be changeable at runtime, especially after a torrent has finished downloading and has been moved.

  • Add torrent priorities

    Add torrent priorities

    We have P available peer connections and t active torrents. By default, each torrent will be able to use P/t connections (but may use more if other torrents use fewer.) However, we may want to prioritize some torrents over others. There are two ways to do this, and we probably want both of them:

    1. Give individual torrents a bigger share of connections. Each torrent will have a factor f in [0, ∞] defaulting to 1. The minimum peers per individual torrent will then be f / ∑(all factors) · P. The user could have a set of such factors, like 1, 5, 10, ... and give them names such as "normal", "medium", "high"... Ultimately, the choice of factors determines just how starved a torrent can be in relation to other torrents.
    2. Assign priority groups to torrents, and allocate connections to groups in order of priority, allowing more important groups to use up all connections, leaving none for lower priority groups. Within a group, factors would apply, but only consider torrents within the group.

    The same approaches can be extended to upload/download slots.

  • Provide CLI tool for showing information from torrent file

    Provide CLI tool for showing information from torrent file

    Basically, provide a tool similar to transmission-show, but add support for structured output and accessing all information, including the source tag. This tool will be part of how to use gamayun. For example, to seed torrents from directories based on the tracker, one could do something like gamayun --add foo.torrent --dir /seed/$(gamayun-info --source foo.torrent)

  • Be quicker at unchoking new peers

    Be quicker at unchoking new peers

    We choke/unchoke peers every 10 seconds, based on an choking algorithm. However, I don't think it makes sense to wait 10 seconds to unchoke peers if we still have free slots. We should unchoke them as soon as they express their interest.

  • Load metainfo lazily

    Load metainfo lazily

    In a seed-centric workload with lots of torrents, keeping all metainfo in memory at all times is a waste of memory. The majority of torrents will be idle and not need to know more than their infohash. Even active torrents won't need piece hashes if they're just seeding. We should load metainfo lazily, and only load the subset of metainfo that we need.

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