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Chapter 16

Chapter 16. Database Administration Database Systems: Design, Implementation, and Management, Fifth Edition, Rob and Coronel. In this chapter, you will:. Learn that data are a valuable business asset that requires careful management

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Chapter 16

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  1. Chapter 16 Database Administration Database Systems: Design, Implementation, and Management, Fifth Edition, Rob and Coronel

  2. In this chapter, you will: • Learn that data are a valuable business asset that requires careful management • Learn why and how the database plays a critical role in an organization • Learn that the introduction of a DBMS has important technological, managerial, and cultural organizational consequences • Learn what the database administrator's managerial and technical roles are • Be introduced to several database administration tools • Examine various database administration strategies • See how various database administration technical tasks are performed with Oracle Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  3. Data as a Corporate Asset • Raw material used to produce information • Valuable resource • Information • Timely and accurate data can trigger beneficial actions • Basis for knowledge • Used in decision making Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  4. Data-Information-Decision Cycle Figure 16.1 Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  5. Databases in an Organization • DBMS facilitates • Interpretation and presentation of data • Distribution of data and information • Data preservation and monitoring • Control over data duplication and use • Supports managerial decision making • Top • Middle • Operational Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  6. Introduction of Database • Big organizational change and challenge • Process with three primary aspects • Technological • Managerial • Cultural • Must focus on organizational needs Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  7. Evolution of Database Administration • Roots in decentralized file systems • Electronic Data Processing (EDP) or Data Processing (DP) Department • Information systems (IS) department Figure 16.2 Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  8. Evolution of Database Administration (Con’t.) • Database administration created to handle complex data management tasks • Database administrator (DBA) responsible for control of database • Factors affecting DBA placement in organization • Management style • Size and complexity of operations • Geographic distribution of facilities • General coordinator of all DBAs is systems administrator (SYSADM) • Data administrator (DA) Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  9. Placement of DBA Function Figure 16.3 Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  10. DBA Functional Organization Figure 16.4 Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  11. DA Versus DBA Table 16.1 Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  12. Summary of DBA Activities Figure 16.6 Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  13. DBA Skills Table 16.2 Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  14. DBA Activities and Services Table 16.3 Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  15. DBA Service: End-User Support • User requirements gathering • Conflict and problem resolution • Finding solutions to information needs • Ensuring quality and integrity of applications and data • Building end-user confidence • Managing the training and support of DBMS users Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  16. DBA Service: Policies, Procedures, & Standards • Policies • General statements of direction or action • Communicate and support DBA goals • Standards • More detailed and specific than policies • Describe minimum requirement of DBA activity • Procedures • Written instructions that describe steps for activity • Support and enhance work environment Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  17. DBA Service: Security, Privacy, & Integrity • Authorization management • User access management • View definition • DBMS utilities access control • DBMS usage monitoring • Security breaches • Preserved integrity • Data recovery may not be necessary • Corrupted integrity • Database must be recovered Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  18. DBA Service: Data Backup and Recovery • Database security officer (DSO) • Disaster management • Periodic data and applications backups • Proper backup identification • Convenient and safe backup storage • Physical protection • Personal access control • Insurance coverage for the data in the database • Data recovery and contingency plans must be tested and evaluated • Backup and recovery may not cover all aspects of IS Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  19. DBA Service: Data Distribution and Use • Data useful in right hands at right time • Current philosophy makes authorized data access easier • Sophisticated query tools • Web front ends • Data democracy • Cautions due to improper use of data Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  20. DBA’s Technical Role • DBMS and utilities evaluation, selection, and installation • Design and implementation of databases and applications • Testing and evaluation of databases and applications • Operation of the DBMS, utilities, and applications • Training and supporting users • Maintenance of the DBMS, utilities, and applications Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  21. DB Administrative Tools: Data Dictionary • Integrated data dictionary • Included with the DBMS • Stand-alone data dictionary • From third-party vendor • Active data dictionary • Automatically updated by the DBMS • Passive data dictionary • Created and updated by a batch process Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  22. DB Administrative Tools: Data Dictionary (Con’t.) • Data elements in all tables • Tables defined in all databases • Indexes defined for each database table • Defined database specifics • End users and administrators of database • Programs that access database • Access authorizations for all users • Relationships among data elements Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  23. DB Administrative Tools: CASE • CASE is Computer-Aided Software Engineering • Provides automated framework for Systems Development Life Cycle • Classifications • Front-end CASE tools support planning, analysis, and design • Back-end CASE tools support coding and implementation Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  24. DB Administrative Tools: CASE (Con’t.) • Reduction in development time and costs • Automation of the SDLC • Standardization of the systems development methodologies • Easier maintenance of application systems developed with CASE tools • Improves communications among the DBA, applications designers, and end users Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  25. Data Administration Strategy: Information Engineering • Information Engineering (IE) translates strategic goals of the company into data and applications • Focuses on description of corporate data instead of the processes • Output is Information Systems Architecture (ISA) • Serves as the basis for planning, development, and control of future IS Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  26. Forces Affecting Development of ISA Figure 16.8 Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  27. Critical Success Factors for IS Strategy • Management commitment • Thorough company situation analysis • End-user involvement • Defined standards • Training • Small pilot project Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

  28. Database Administration Using Oracle • Security Manager • Schema Manager • Storage Manager • SQL Worksheet • Instance Manager Figure 16.9 Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel

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