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As the development of social network, mobile Internet, etc., an increasing amount of data are being generated, which beyonds the processing ability of traditional data management tools. In many real-life applications, users can accept approximate answers accompanied by accuracy guarantees. One of the most commonly used approaches is online aggregation.(More)
With the rapid increase of data sizes, enterprise applications are migrating their backend data management and analytic systems into cloud based data management systems.Bigtable is among one of the major data models used by cloud storage systems as their storage layer. Such systems provide high scalability and schema flexibility, and support efficient point(More)
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