This book constitutes the refereed proceedings of the 8th IFIP International Conference on Network and Parallel Computing, NPC 2011, held in Changsha, China, in October 2011. The 28 papers presented were carefully reviewed selected from 54 submissions. The papers are organized in the following topical sections: filesystems and data, network and parallel algorithms, cluster and grid, trust and authentication, and monitor, diagnose, and then optimize.