3. Definition : Simplex perception- No more than collection of Key pieces of information used to manage & direct the business for the most profitable outcome. Precise Definition- It concentrate on data- Data should be subject oriented, be consistent across sources & so on. Pearson’s Definition- It is more than vast data- it is also process involved in getting that data from source to table & from table to analyst’s. ** In other word ** “ A DWH is the data (Meta/fact/dimension/aggregate) and process manager (load/warehouse/query) that make information available, enabling people to make informed decision.
4. Data-ware housing Architecture : DWH must architected to support three major driving factors. 1) Populating DWH. 2) Day-to-Day management of DWH. 3) The ability to cope with requirement evolution.
5. Typical Process flow within D.W.H Source Extract & load Warehouse Data transformation and movement User Query Archive data
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7. Extract & load process: Op. Data Suitable for operational System, May have been modified & extended over yr’s to support performance. D.W.H Reconstructed
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12. 4) Query management process : Directing query to most effective data source.
14. Process Function System manager Extract & load Extract & load the data, performing simple transformations before & during load. Load Manager Clean & transform Data Transforms & Manages data Warehouse manager Backup & archive Backs up & archives data warehouse Ware house manager Query Manager Directs & manages queries Query Manager
15. Operational Data Operational Data L O A D M A N A G E R Detailed information Summary info Meta Data Q U E R Y M A N A G E R Warehouse Manager Data dipper OLAP tools Data Information Decision Architecture of data-ware house
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21. Load Manager Architecture File structure Temporary data Store Ware house str. Load Manager Controlling Process Stored Procedure Copy management tools Fast loader
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24. Ware house Manager Architecture Temporary data store Star flake schema Summary tables Ware-house Manager Controlling Process Stored Procedure Backup /recovery tool SQL scripts
