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Due to the highly distributed and dynamic features, service discovery is a key requirement in grid computing. The paper first introduces the existing service discovery mechanisms in distributed computing, and then points out the problems in MDS which is widely used in grid systems. In order to address these issues, GNSD, a novel service discovery mechanism is proposed, which is based on the OSPF (Open...
Efficient service discovery in dynamic, cross-organizational is one of the challenge aspects in ChinaGrid. Network overlay and search algorithms are two important considerations to the problem. Tree topology of organizations is easily managed but the root is a single point of failure; P2P structure tends to be conversed. To merge the advantages of both, we present a hybrid system with two layers:...
Resource information service, as a key component of grid, is the basis of the resource allocation, resource performance evaluation and prediction. The validity of the resource information service directly influences the availability of the whole system. One of key points to make information service work well is the precise of the information collected, how to get the valid system information with...
In this paper we define a decentralized management mechanism for the dynamic coalition characteristic of virtual organization. We propose an identity-based threshold signature scheme for joint management. We also propose the policy mode for joint management, which uses role-based access control mechanism for authorization policies definition, and voting mechanism for authorization decision-making...
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