DHT on Mi&Bee Blog

P2P Network Core Principles

Sun, 15 Mar 2020 00:00:00 +0000

Peer-to-Peer (P2P) networking is a decentralized architecture where every node acts as both a provider (Server) and consumer (Client). This architecture is widely used in file distribution (BitTorrent), cryptocurrency (Bitcoin), decentralized storage (IPFS), and many other domains.

P2P vs Client-Server Architecture

Before diving into P2P principles, let’s understand the fundamental differences through comparison:

Feature	Client-Server	P2P Network
Centralization	Highly centralized	Decentralized / Hybrid
Single Point of Failure	Exists	Does not exist
Scalability	Limited by server	Linear with node count
Bandwidth Cost	Borne by server	Shared by nodes
Fault Tolerance	Low	High
Lookup Complexity	O(1)	O(log N)

The core advantage of P2P lies in eliminating single points of bottleneck and failure, at the cost of introducing more complex node discovery and data routing mechanisms.

Kademlia DHT Protocol Deep Dive

Wed, 20 Jan 2021 00:00:00 +0000

Kademlia is one of the most influential DHT (Distributed Hash Table) protocols, proposed by Petar Maymounkov and David Mazières in 2002. It is widely used in IPFS, BitTorrent, Ethereum, and many other systems. Kademlia’s revolutionary innovation lies in using XOR (exclusive or) as its distance metric, offering elegant mathematical properties and efficient routing algorithms.

XOR Distance Metric

Kademlia maps nodes and resources to the same 160-bit identifier space and defines the XOR distance function:

Go P2P Development: From Basics to PubSub

Mon, 05 Jun 2023 00:00:00 +0000

Go’s simple concurrency model and fast compilation make it a popular choice for P2P network development. go-libp2p is one of the most complete libp2p implementations and is widely used in large projects like IPFS (Kubo).

Environment Setup

bash


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go get github.com/libp2p/go-libp2p
go get github.com/libp2p/go-libp2p-kad-dht
go get github.com/libp2p/go-libp2p-pubsub

go.mod configuration: