Parallel generation of base relation snapshots for materialised view maintenance in data warehouse environment. (13th November 2007)

• Record Type: Journal Article
• Authors: Saeki, Shin'ichirou; Bhalla, Subhash; Hasegawa, Masaki
• Is Part Of: International journal of computational science and engineering. Volume 3:Number 2(2007)
• Page Start: 166
• Page End: 172
• Publication Date: 2007-11-13
• Subjects: data warehouse -- long duration transactions -- materialised views -- view maintenance -- data storage -- source data -- snapshots; Computer science -- Mathematics -- Periodicals; Computer simulation -- Mathematical aspects -- Periodicals; Computational intelligence -- Periodicals; 004.015105
• Languages: English
• ISSNs: 1742-7185

Abstract

A data warehouse organises and stores data needed for informational, analytical processing over a long historical time perspective. These keep a materialised view (such as historical data), and user queries are processed using this view. The view has to be maintained to reflect the updates done against the base relations stored at the various distributed data sources. For unsophisticated sources, in practice it is often necessary to infer modifications by periodically comparing snapshots and backup copies of data from the source. This study considers the materialised view and its maintenance. Various differential snapshot algorithms have been compared.