Enhancing XML data warehouse query performance by fragmentation

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Enhancing XML data warehouse query performance by fragmentation
XML data warehouses form an interesting basis for decisionsupport applications that exploit heterogeneous data from multiple sources. However, XML-native database systems currently suffer from limited performances in terms of manageable data volume and response time for complex analytical queries. Fragmenting and distributing XML data warehouses (e.g., on data grids) allow to address both these issues. In this paper, we work on XML warehouse fragmentation. In relational data warehouses, several studies recommend the use of derived horizontal fragmentation. Hence, we propose to adapt it to the XML context. We particularly focus on the initial horizontal fragmentation of dimensions’ XML documents and exploit two alternative algorithms. We experimentally validate our proposal and compare these alternatives with respect to a unified XML warehouse model we advocate for. Keywords XML data warehouses, Multidimensional model, XML-native databases, performance, fragmentation.
Hadj Mahboubi, Jérôme Darmont
Added 19 May 2010
Updated 19 May 2010
Type Conference
Year 2009
Where SAC
Authors Hadj Mahboubi, Jérôme Darmont
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