As the number of scientific disciplines has increased, the large data collections are emerging as important community resources. In domains as high energy physics, and computational genomic, the volume of interesting data is already measured in terabytes and will soon total peta bytes. The research communities need to access and analyze this data using complex computational and access techniques. No data management infrastructure provides solution against the complex computational analysis of huge and geographically distributed data sets. Most of queries usually search analyzed data from terabytes of distributed data repository, over wide area networks.