A Quantitative Study to Evaluate the Performance of the Semantic Cache Management Methods

The diversity and the heterogeneity of distributed systems make the setting up of a mediation system an indispensable necessity. To reduce the time of answering the clients´ queries, it is necessary to design a device destined to maintain the results of these queries in a memory for a posterior use in a semantic cache. For the purpose of a good management of the cache, this paper proposes a comparative study between two methods of semantic cache design and organization, namely the one region and multi-region. To improve the query performance we have developed a semantic cache system on AXMed mediator, which applies innovative query analysis and rewriting technique to answer the client´ queries using one region method, Extensive experimental results on the size of memory and time response illustrate the performance improvement achieved by one region over the multi-region method for a variety of situations