Details Revealed for Fountain Code-Based Transport Protocol atp
doodlestein · x · 2026-07-11
The author shared more technical details about their custom data transfer protocol, atp, presenting benchmark comparisons against rsync along with extensive negative evidence illustrating the difficulty of outperforming rsync.
- Technical Principle: The core of atp is based on RaptorQ fountain codes (RFC 6330). It converts files into a stream of symbols, requiring only any K symbols (plus a tiny margin of redundancy) to reconstruct the original file.
- Advantages: This mechanism acts like interchangeable drops of water from a fountain, drastically improving the fault tolerance and efficiency of data transfers.
Related event: ATP Details Its Fountain-Code Transfer Design(2 posts)→
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