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Lossless Reduction of Datacubes

机译:数据立方体的无损减少

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摘要

Datacubes are specially useful for answering efficiently queries on data warehouses. Nevertheless the amount of generated aggregated data is incomparably more voluminous than the initial data which is itself very large. Recently, research work has addressed the issue of a concise representation of datacubes in order to reduce their size. The approach presented in this paper fits in a similar trend. We propose a concise representation, called Partition Cube, based on the concept of partition and define an algorithm to compute it. Various experiments are performed in order to compare our approach with methods fitting in the same trend. This comparison relates to the efficiency of algorithms computing the representations, the main memory requirements, and the storage space which is necessary.
机译:数据多维数据集对于有效回答数据仓库中的查询特别有用。但是,生成的聚合数据的数量比本身非常大的初始数据要庞大得多。最近,研究工作已经解决了数据立方体的简洁表示问题,以减小其大小。本文提出的方法也符合类似趋势。我们基于分区的概念提出了一个简洁的表示形式,称为Partition Cube,并定义了一种算法来对其进行计算。为了将我们的方法与适应相同趋势的方法进行比较,进行了各种实验。这种比较涉及算法计算表示的效率,主内存需求以及必要的存储空间。

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