Comparison of View-Size Estimation Algorithms in OLAP
نویسندگان
چکیده
منابع مشابه
UNASSSUMING view-size estimation techniques in OLAP - an experimental comparison
Even if storage was infinite, a data warehouse could not materialize all possible views due to the running time and update requirements. Therefore, it is necessary to estimate quickly, accurately, and reliably the size of views. Many available techniques make particular statistical assumptions and their error can be quite large. Unassuming techniques exist, but typically assume we have independ...
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Even if storage was infinite, a data warehouse could not materialize all possible views due to the running time and update requirements. Therefore, it is necessary to estimate quickly, accurately, and reliably the size of views. Many available techniques make particular statistical assumptions and their error can be quite large. Unassuming techniques exist, but typically assume we have independ...
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On Line Analytical Processing (OLAP) aims at gaining useful information quickly from large amounts of data residing in a data warehouse. To improve the quickness of response to queries, preaggregation is a useful strategy. However, it is usually impossible to pre-aggregate along all combinations of the dimensions. The multidimensional aspects of the data lead to combinatorial explosion in the n...
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ژورنال
عنوان ژورنال: Computer Science and Application
سال: 2014
ISSN: 2161-8801,2161-881X
DOI: 10.12677/csa.2014.47018