High-Performance Parallel Database Processing and Grid Databases- P10: Parallel databases are database systems that are implemented on parallel computing platforms. Therefore, high-performance query processing focuses on query processing, including database queries and transactions, that makes use of parallelism techniques applied to an underlying parallel computing platform in order to achieve high performance. | 430 Chapter 16 Parallel Data Mining Association Rules and Sequential Patterns Operational Data Data Extraction Data Warehouse O Extract oFíhee O Transform O Integrate oClassify O Aggregate O Summarize O Integrated O Non-Volatile O Time-Variant O Subject-Oriented Figure Building a data warehouse A data warehouse is integrated and subject-oriented since the data is already integrated from varioussources through the cleaning process and each data warehouse is developed for a certain domain of subject area in an organization such as sales and therefore is subject-oriented. The data is obviously nonvolatile meaning that the data in a data warehouse is not update-oriented unlike operational data. The data is also historical anO nonmairynrouped tornflect a cgoa-m nsr-gdc tine and hence it is time-ganiaot. Once a data wareirune has Ixn is adia toperfonn some operation on thedataharehouse tuchasdril--down and hotlup. Dri-i-dowm is performed in ordenta obtaio o moieOatailidireakdowiofacir-ain dimenssgn whereas rollup whiah-s exocttyttie oppo-ete ígcegrdpggd in order to obtammoee general informationgCouiecartam dimmlion. Business reporting often makes use of data warehouses nioeder toprnOuce histoiicalenglys-r for dccisionninpog. Pgrgllelism of OLAPPss raegdygerg presented iuChapnr S5. As cgn be seen fromlhesbeve iPcmamOiffgregcgbgiwgggc Oa-obcre gi a data wgrehouse lies in-l-eddig stself 01 3 wern-rFintorical. Huwssesi any decision to support h-e-se ogahato wgehouse he-lto ivnhmitgin ue for historicgl reportig- necOs tn il- sgsdl tnSl imn a lntod eone iso 0-Oi. If the mgnggement dogs notPnowwCat mgocmatiog-spalterdor kgowteFgg to expect dgtg wgrehousmt irno- a--e torstisi- Um reqn-remegtiA-dpiei-1 gnne-dote is that a magaelogivesnpsle o-dagi to egOordi-oteragO argo tl-mto -mi something useful in hoee notkiiow whgi toennrd- but issnrn dsgp something useful andsinprisingm-Flxt gxtrgeted from isnoi g typical
