A cooperative caching method in a P2P Cache system

• Main Author: BAN ZHIYUAN
• Format: Patent
• Language: Chinese; English
• Published: 26.02.2014
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention discloses a cooperative caching method in a P2P Cache system. The method comprises the following steps: Q1, each P2P caching node records cached files, and global values V of the cached files in a corresponding network domain are periodically calculated and stored; Q2, in a step of a P2P user node A requesting a file h in a network domain i, when the file h requested by the P2P user node A does not exist in the network domain i, whether the file is cached is determined; Q3, a global value Vih of the file h in the network domain i is calculated, and the global value Vih is compared with a global value of the cached file in a P2P caching node Q; and if the global value Vih of the file h in the P2P caching node Q is minimum, caching operation is not carried out; and otherwise, the caching operation is carried out. According to the cooperative caching method in the P2P Cache system, the system caching efficiency is raised, system resources are saved, and the global costs in the system are reduced.