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this post was submitted on 22 Sep 2023
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The Kademlia network (eMule, Kazaalite, etc), did indeed use a global P2P Distributed Hash Table, to resolve which IPs hosted which content, which the torrent protocol also does ... some of:
Unlike the mainline torrent protocol, Kademlia's DHT (like the modern-day Tribler DHT), also resolved filenames to content, allowing in-app search.
With torrents, one needs to consult a DHT crawler, or an index site (which sucks; centrally operated sites are fragile, compared to DHTs), whereas eMule & more contemporarily Tribler, have two layers of DHT, enabling decentralized search without relyiance on someone having created a listing at some particular site & that site being online to search its index.
Thanks for the background.
Been a while since I used emule (surprised I remember it!), and I honestly didn't know the details even then (I was lazy and it worked).