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Erschienen in:
2006 | OriginalPaper | Buchkapitel
Resumption of Data Extraction Process in Parallel Data Warehouses
verfasst von : Marcin Gorawski, Pawel Marks
Erschienen in: Parallel Processing and Applied Mathematics
Verlag: Springer Berlin Heidelberg
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ETL processes are sometimes interrupted by occurrence of a failure. In such a case, one of the interrupted extraction resumption algorithms is usually used. In this paper we present a modified Design-Resume (DR) algorithm enriched by the possibility of handling ETL processes containing many loading nodes. We use the DR algorithm to resume a parallel data warehouse load process. The key feature of this algorithm is that it does not impose additional overhead on the normal ETL process. In our work we modify the algorithm to work with more than one loading node, which increases the efficiency of the resumption process. Based on the results of performed tests, the benefits of our improvements are discussed.