1. Applying Concepts of Software Reuse to the Implementation of Data Warehouse ETL Systems Jiayang Zhou November 2001

2. Data Warehouse Loader sd&m Applying concepts of software reuse to Data Warehouse Loader Fundamental of software reuse Description of Data Warehouse Loader Implementation of Data Warehouse Loader Reuse Analysis of Data warehouse Loader Summary

3. Data Warehouse Loader sd&m Applying concepts of software reuse to Data Warehouse Loader Fundamental of software reuse Description of Data Warehouse Loader Implementation of Data Warehouse Loader Reuse Analysis of Data warehouse Loader Summary

4. Data Warehouse Loader sd&m Definition of Software reuse Software reuse is a process of implementing or updating software systems using existing software assets. software componentsobjectssoftware requirements analysis design modeldomain architecturedatabase schema codedocumentationmanualstandardstest scenario plan

5. Data Warehouse Loader sd&m Importance of Software reuse Increases productivity Enhances quality Saves cost Reduces software development schedules Reduces maintenance Enhances standardization Increases portability

6. Data Warehouse Loader sd&m Fundamental of software reuse Description of Data Warehouse Loader Implementation of Data Warehouse Loader Reuse Analysis of Data warehouse Loader Summary Applying concepts of software reuse to Data Warehouse Loader

7. Data Warehouse Loader sd&m Architecture of data warehouse application

8. Data Warehouse Loader sd&m Features of data warehouse A data warehouse is a Subject-oriented Integrated Time-variant Non-volatile collection of data for management ’ s decision making process.

9. The role of Data Warehouse Loader Extraction: extract raw data from different source system Transformation: transform data in order to be fit into the architecture of data warehouse Loading: import data into data warehouse

10. Data Warehouse Loader sd&m The requirements of Data Warehouse Loader Adaptability to any data source systems Adaptability to any target data warehouse High operation speed Ability to deal with large amount of data Flexibility for data transformation Portability

11. Data Warehouse Loader sd&m The reuse consideration of Data Warehouse Loader

12. Data Warehouse Loader sd&m Fundamental of software reuse Description of Data Warehouse Loader Implementation of Data Warehouse Loader Reuse Analysis of Data warehouse Loader Summary Applying concepts of software reuse to Data Warehouse Loader

13. Data Warehouse Loader sd&m Architecture of Data Warehouse Loader

14. Data Warehouse Loader sd&m Loader-engine

15. Data Warehouse Loader sd&m Loader-interface Extraction-interface: access to data source Transformation-interface: different transformation scheme Database-interface: access to data warehouse for updating and retrieving Record-interface: construct an object structure for each database record

16. Data Warehouse Loader sd&m

17. Format of intermediate file INFO header FORMAT header DATA body

18. Data Warehouse Loader sd&m Fundamental of software reuse Description of Data Warehouse Loader Implementation of Data Warehouse Loader Reuse Analysis of Data warehouse Loader Summary Applying concepts of software reuse to Data Warehouse Loader

19. Data Warehouse Loader sd&m Reuse development of Data Warehouse Loader Thorough examination of application requirements Good documentation Choosing of Java as programming language Concrete separation of specification from a particular application

20. Data Warehouse Loader sd&m Advantages of workflow architecture Easy maintenance Module reuse Temporally decoupling Manageable and controllable programming Re-composition of operation sequence

21. Data Warehouse Loader sd&m Re-composition of operation sequence

22. Data Warehouse Loader sd&m Appling concepts of software reuse Code reuse Adaptability Modularity Interface

23. Data Warehouse Loader sd&m Reuse architecture of Data Warehouse Loader

24. Data Warehouse Loader sd&m Package overview of Data Warehouse Loader

25. Data Warehouse Loader sd&m Fundamental of software reuse Description of Data Warehouse Loader Implementation of Data Warehouse Loader Reuse Analysis of Data warehouse Loader Summary Applying concepts of software reuse to Data Warehouse Loader

26. Data Warehouse Loader sd&m START-MDB project

27. Data Warehouse Loader sd&m Java and C C fast migration between different systems difficulty for flexibility Java slow and large RAM consumption portability and platform-independence easy for flexibility object-oriented feature

28. Data Warehouse Loader sd&m Thank you very much for your attention! meg.zhou@sdm.com