关键词: 分布式缓存,KNN算法,本体,数据交换

Abstract: This paper gave an example of the management system of Open University of China,and proposed a distributed cache strategy for data exchange program based on ontology and KNN algorithm to solve the optimization problems in access time,cost and resources quality when distributed system exchanges data between the different nodes.The correctness and effectiveness of the presented strategy is demonstrated by a simulation application designed in the paper,and results show that the strategy can improve the efficiency of data exchanging in distributed system.

Key words: Distributed cache,KNN,Ontology,Data exchange