Performance-based content retrieval for learning object repositories on grid environments
Contributor(s)[[other]]High-Performance Computing Laboratory, Department of Computer Science and Information Engineering, Tunghai University
KeywordsBandwidth; Information retrieval; Mathematical models; Resource allocation; Teaching; Grid environments; Grid testbed; Performance-based approach; Learning systems
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Abstract[[abstract]]The Sharable Content Object Reference Model (SCORM) has become a popular standard for sharing and reusing teaching materials in the field of elearning. However, efficient retrieval of SCORMcompliant learning objects stored on grid environments is a challenging problem. In this paper, a performance-based approach is proposed to retrieve teaching materials in grid environments. The proposed architecture uses the real-time information gathered by a resource-monitoring tool to estimate the dynamically changing performance of each node, for CPU loading and network bandwidth. In addition, a grid testbed is built to implement the model. Experimental results show that the proposed approach can choose the most appropriate site to reduce the retrieval time. ? 2006 IEEE.