Dissertation > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer software > Program design,software engineering > Programming > Database theory and systems

Distributed database data under the horizontal distribution of the skyline

Author YanWeiYu
Tutor ZhouLiHua
School Yunnan University
Course Computer Software and Theory
Keywords skyline computation Distributed database Zoning Multi-window collection
CLC TP311.13
Type Master's thesis
Year 2010
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Skyline computing is found from a dataset of data points is not dominated by the other set of all points . If a data a disposable another data b, then a property value for each dimension of the corresponding attribute value is not higher than b \\In recent years , skyline computing has become a hot topic in the field of databases , mainly because of its multi-criteria decision making , data mining and visualization of databases and other fields have potential applications . For centralized database skyline computation under study is relatively mature, distributed database under the skyline computation as a late start , the existing research results are still not mature enough. In this thesis, the data is horizontally distributed database distributed under the skyline computation problem . The horizontal distribution of data refers to the data stored in a different set of distributed servers. The main thesis work includes the following aspects: ( 1 ) research on individual servers local skyline set the global skyline set the relationship between the proposed re- calculated by summing the partial results of the global skyline set to get the idea . ( 2 ) In order to improve computational efficiency , proposed a \Papers discussed in depth the idea of ??zoning and zoning on different servers between relations of domination are given under the three-dimensional data space based on the \( 3 ) to further discuss the need for high -dimensional data space zoning may occur under some of the issues raised before the three-dimensional data only for a regional breakdown of the incomplete division of thought and skyline computation solutions. ( 4 ) conducted a large number of experiments , experimental results obtained through the thesis of the \

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