Peer-to-Peer Systems

Volume 2429 of the series Lecture Notes in Computer Science pp 53-65


Kademlia: A Peer-to-Peer Information System Based on the XOR Metric

  • Petar MaymounkovAffiliated withNew York University
  • , David MazièresAffiliated withNew York University

* Final gross prices may vary according to local VAT.

Get Access


We describe a peer-to-peer distributed hash table with provable consistency and performance in a fault-prone environment. Our system routes queries and locates nodes using a novel XOR-based metric topology that simplifies the algorithm and facilitates our proof. The topology has the property that every message exchanged conveys or reinforces useful contact information. The system exploits this information to send parallel, asynchronous query messages that tolerate node failures without imposing timeout delays on users.