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In this paper we present a technique, called Bitmap Sharing, for sharing data among multiple versions of a data warehouse (DW). To this end. vre apply bitmaps that describe DW versions a given data item is shared by. Bitmap Sharing was implemented and experimentally compared to two other advanced data sharing techniques proposed in the literature. The results demonstrate that Bitmap Sharing outperforms these techniques for: inserting data into multiple DW versions, selecting data from given DW versions, and deriving multiple DW versions with shared data.
Słowa kluczowe
Rocznik
Tom
Strony
87--109
Opis fizyczny
Bibliogr. 69 poz.
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autor
autor
- Poznań University of Technology, Institute of Computing Science, Poznań, Poland, Robert.Wrembel@cs.put.poznan.pl
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Bibliografia
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