Based on the advantages of both Grid and peer-to-peer （P2P） networks, an overlay network in the Grid environment is constructed by P2P technologies by a modified version of the Chord protocol. In this mechanism, dif...Based on the advantages of both Grid and peer-to-peer （P2P） networks, an overlay network in the Grid environment is constructed by P2P technologies by a modified version of the Chord protocol. In this mechanism, different nodes＇ accesses to different resources are determined by their contribution. Therefore, the heterogeneous resources of virtual organizations in large-scale Grid can be effectively integrated, and the key node failure as well as system bottleneck in the traditional Grid environment is eliminated. The experimental results indicate that this management mechanism can achieve better average performance in the Grid environment and maintain the P2P characteristics as well.展开更多
This paper presents Sphere, a scalable multicast framework in overlay network. Sphere is a highly efficient, serf-organizing and robust multicast protocol overlayed on the Internet. The main contrihutions of this pape...This paper presents Sphere, a scalable multicast framework in overlay network. Sphere is a highly efficient, serf-organizing and robust multicast protocol overlayed on the Internet. The main contrihutions of this paper are twofold. First, Sphere organizes the control topology of overlay network in two directions： horizontal and vertical. The horizontal meshes are used to locate and organize hosts in tracks, and the vertical meshes are. used to manage the data paths between tracks. Second, Sphere balances stress and stretch of the overlay network by assigning hosts into different tracks and clusters. This structure distributes stress on the muhicast trees uniformly, and meantime makes path stretch as small as possible. Simulations results show that Sphere can support multicast with large group size and has good performance on organizing meshes and building data delivery trees.展开更多
基金The National Natural Science Foundation of China(No60573133)the National Basic Research Program of China (973Program)(No2003CB314801)
文摘Based on the advantages of both Grid and peer-to-peer （P2P） networks, an overlay network in the Grid environment is constructed by P2P technologies by a modified version of the Chord protocol. In this mechanism, different nodes＇ accesses to different resources are determined by their contribution. Therefore, the heterogeneous resources of virtual organizations in large-scale Grid can be effectively integrated, and the key node failure as well as system bottleneck in the traditional Grid environment is eliminated. The experimental results indicate that this management mechanism can achieve better average performance in the Grid environment and maintain the P2P characteristics as well.
文摘This paper presents Sphere, a scalable multicast framework in overlay network. Sphere is a highly efficient, serf-organizing and robust multicast protocol overlayed on the Internet. The main contrihutions of this paper are twofold. First, Sphere organizes the control topology of overlay network in two directions： horizontal and vertical. The horizontal meshes are used to locate and organize hosts in tracks, and the vertical meshes are. used to manage the data paths between tracks. Second, Sphere balances stress and stretch of the overlay network by assigning hosts into different tracks and clusters. This structure distributes stress on the muhicast trees uniformly, and meantime makes path stretch as small as possible. Simulations results show that Sphere can support multicast with large group size and has good performance on organizing meshes and building data delivery trees.
