AChord: Topology-Aware Chord in Anycast-Enabled Networks

Chord is a scalable peer-to-peer (P2P) lookup protocol that solves the problem of efficiently locating nodes with designed data items. However, Chord is known to be limited in routing efficiency since all nodes are placed on the overlay without taking into account the underlying network topology. In this paper, we introduce AChord, a topology-aware version of Chord that utilizes anycast, along with additional modifications, to achieve higher routing efficiency. Simutation results show that the proposed approach achieves better performance than the original Chord in the sense of end-to-end lookup latency and average path length.