Cache attempts to improve performance in P2P systems in three ways: improve response time, availability and load balancing. Despite their benefits, some proposals are very coupled with the application level and cannot be easily implemented in other environments, other use pre-defined structures difficult to maintain, or assume peers are physically homogeneous. So, the search for portable and flexible strategies remains an open problem. In this paper we present a caching strategy for improving response time during a query execution using a catalog with information of neighbors cached items, allowing the interaction between different cache levels. A performance evaluation using grids is provided to verify the improvement achieved.
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