Effective Data Replication in Heterogeneous Structured P2P Networks

The traditional way to achieve high data availability in structured P2P network is to replicate the data items preserved on the node to its neighbor nodes. However, in some heterogeneous structured P2P networks, the neighbor nodes are always close to each other in locality. Therefore, if some local disaster happened, it is very likely that some data items would be permanent lost. Moreover, this traditional data replication strategy will bring complex data migration when there are nodes join or leave the DHT network. In this paper, we propose a novel data replication strategy in heterogeneous structured P2P networks. It not only guarantee the availability of data items in the situation of large-scale local disaster, but also greatly reduce the complexity of data migration when nodes join or leave the network.