In recent years, KAD, a Kademlia based DHT, has been widely used in peer-to-peer file sharing systems. A novel and fast distributed KAD crawling system was introduced. This distributed system was deployed on multiple computers and the user information of the overlay network was crawled as much as possible. Finally, the characteristics of nodes were analyzed and summarized. The measurement showed that the search mechanism of KAD network is stable and effective.
