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Database Administration

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Database Administration

  1. 1. Database Users and Administration
  2. 2. <ul><li>Database Users </li></ul><ul><li>Data Administration </li></ul><ul><li>Database Administration </li></ul><ul><li>DBA Functions </li></ul><ul><li>DBA Role </li></ul>Database Users & Administration
  3. 3. <ul><li>1. The End User </li></ul><ul><li>The one who will use the information </li></ul><ul><li>Unaware of the background processes </li></ul><ul><li>Perhaps has little or no computing knowledge </li></ul><ul><li>Expertise is in the use of the data </li></ul>Database Users
  4. 4. <ul><li>1. The End User (cont.) </li></ul><ul><li>The information must be </li></ul><ul><ul><li>correct </li></ul></ul><ul><ul><li>readily available </li></ul></ul><ul><ul><li>user friendly format </li></ul></ul><ul><ul><li>meet their requirements </li></ul></ul><ul><ul><li>allow them to be productive </li></ul></ul>Database Users
  5. 5. <ul><li>2. Database specialist </li></ul><ul><ul><li>Database Administrator </li></ul></ul><ul><ul><li>Database Designer </li></ul></ul><ul><ul><li>Database Analyst </li></ul></ul><ul><ul><li>Database Programmer </li></ul></ul><ul><ul><li>Database Technician </li></ul></ul>Database Users
  6. 6. <ul><li>A high level management function (E.g. Director) </li></ul><ul><li>Determination of overall information needs from a management perspective </li></ul><ul><li>Developing & administering the policies, procedures, practices & plans for definition, organisation, protection & efficient utilisation of data </li></ul><ul><li>Encompasses all corporate data whether computerised or not </li></ul>Data Administration
  7. 7. <ul><li>Normally responsible for computerised systems only </li></ul><ul><li>Management & Co-ordination function </li></ul><ul><li>Technical function responsible for: </li></ul><ul><ul><li>physical database design </li></ul></ul><ul><ul><li>security </li></ul></ul><ul><ul><li>backup </li></ul></ul><ul><ul><li>recovery </li></ul></ul><ul><ul><li>performance </li></ul></ul>Database Administration
  8. 8. Comparison of Roles Data Administrator Database Planning System Specification Conceptual Design Logical Design Database Administrator Major Role DBMS Selection Application Design Physical Design Prototyping Implementation Data Conversion & Loading Testing Operational Maintenance Major Role Minor Role Minor Role
  9. 9. <ul><li>What is it? </li></ul><ul><li>“ To successfully set up and manage an environment in which the data resource is effectively used” </li></ul>Database Administration
  10. 10. <ul><li>THERE ARE THREE MAIN FUNCTIONS: </li></ul><ul><li>1 . Administration & management of Data Content </li></ul><ul><li>2. Administration & management of Data Structure </li></ul><ul><li>3. Administration & management of the Physical Database </li></ul>DBA Functions
  11. 11. <ul><li>1. Administration & management of Data Content </li></ul><ul><ul><li>which data is to be held on the database </li></ul></ul><ul><ul><li>which users have what kind of access to the database </li></ul></ul><ul><ul><li>which kind of users have access to individual items of data </li></ul></ul><ul><ul><li>which consistency checks must be maintained </li></ul></ul><ul><ul><li>when should data be removed </li></ul></ul>DBA Functions
  12. 12. <ul><li>2. The administration and management of data structure. </li></ul><ul><ul><li>how many logical databases do we need ? </li></ul></ul><ul><ul><li>what is the table column structure ? </li></ul></ul><ul><ul><ul><li>normalisation </li></ul></ul></ul><ul><ul><ul><li>functional analysis </li></ul></ul></ul><ul><ul><ul><li>de-normalisation </li></ul></ul></ul><ul><ul><li>how is security to be implemented ? </li></ul></ul>DBA Functions
  13. 13. <ul><li>2. The administration and management of data structure (Cont.) </li></ul><ul><ul><li>how are consistency checks made? </li></ul></ul><ul><ul><li>how is access to be optimised? </li></ul></ul><ul><ul><ul><li>transactions </li></ul></ul></ul><ul><ul><ul><li>clustering </li></ul></ul></ul><ul><ul><ul><li>indexing </li></ul></ul></ul><ul><ul><ul><li>query optimisation </li></ul></ul></ul><ul><ul><li>how and when to re-organise the database? </li></ul></ul>DBA Functions
  14. 14. <ul><li>3. The administration and management of the physical database </li></ul><ul><ul><li>how many copies should run ? </li></ul></ul><ul><ul><ul><li>machine sizing </li></ul></ul></ul><ul><ul><ul><li>operating system performance </li></ul></ul></ul><ul><ul><li>when and how should we perform backups? </li></ul></ul><ul><ul><ul><li>database files </li></ul></ul></ul><ul><ul><ul><li>recovery log files </li></ul></ul></ul>DBA Functions
  15. 15. <ul><li>3.The administration and management of the physical database ( cont.) </li></ul><ul><ul><li>start-up and shutdown procedures . </li></ul></ul><ul><ul><ul><li>DBMS parameters </li></ul></ul></ul><ul><ul><ul><li>control procedures </li></ul></ul></ul><ul><ul><li>what procedures are required to recover from system failures ? </li></ul></ul><ul><ul><ul><li>export / import procedures </li></ul></ul></ul><ul><ul><ul><li>roll forward / rollback </li></ul></ul></ul>DBA Functions
  16. 16. <ul><li>integrity and consistency </li></ul><ul><li>monitoring and tuning </li></ul><ul><li>reducing redundant storage </li></ul><ul><li>facilitating sharing of data </li></ul><ul><li>security </li></ul><ul><li>backups </li></ul><ul><li>recovery </li></ul><ul><li>keep down time to a minimum </li></ul>DBA Role
  17. 17. <ul><li>Liaison with: </li></ul><ul><li>Management </li></ul><ul><ul><li>enterprise objectives </li></ul></ul><ul><ul><li>time constraints for development </li></ul></ul><ul><ul><li>budget constraints </li></ul></ul><ul><ul><li>future plans </li></ul></ul><ul><ul><li>organisational changes </li></ul></ul>DBA Role
  18. 18. <ul><li>Liaison with: </li></ul><ul><li>Users </li></ul><ul><ul><li>data requirements </li></ul></ul><ul><ul><li>application priorities </li></ul></ul><ul><ul><li>ownership of data </li></ul></ul><ul><ul><li>archiving requirements </li></ul></ul><ul><ul><li>documentation </li></ul></ul><ul><ul><li>response times </li></ul></ul>DBA Role
  19. 19. <ul><li>Liaison with: </li></ul><ul><li>Application Development Staff </li></ul><ul><ul><li>security/privacy controls </li></ul></ul><ul><ul><li>education/training </li></ul></ul><ul><ul><li>data integrity rules </li></ul></ul><ul><ul><li>housekeeping programs </li></ul></ul><ul><ul><li>information about the database </li></ul></ul><ul><ul><li>test plans etc. </li></ul></ul>DBA Role
  20. 20. <ul><li>Liaison with: </li></ul><ul><li>Operations Staff </li></ul><ul><ul><li>availability requirements </li></ul></ul><ul><ul><li>batch job priorities </li></ul></ul><ul><ul><li>security procedures </li></ul></ul><ul><ul><li>error recovery requirements </li></ul></ul><ul><ul><li>performance monitoring etc. </li></ul></ul>DBA Role
  21. 21. <ul><li>Liaison with: </li></ul><ul><li>Software Vendors </li></ul><ul><ul><li>Education/training needs </li></ul></ul><ul><ul><li>Hardware requirements </li></ul></ul><ul><ul><li>documentation </li></ul></ul><ul><ul><li>service support & maintenance </li></ul></ul><ul><ul><li>utilities etc. </li></ul></ul>DBA Role
  22. 22. <ul><li>Liaison with: </li></ul><ul><li>Hardware Vendors </li></ul><ul><ul><li>hardware capabilities </li></ul></ul><ul><ul><li>expansion capability </li></ul></ul><ul><ul><li>incompatibility with any existing hardware </li></ul></ul><ul><ul><li>servicing requirements </li></ul></ul><ul><ul><li>training </li></ul></ul><ul><ul><li>equipment failure </li></ul></ul>DBA Role
  23. 23. DA and DBA Tasks Compared
  24. 24. Further Reading <ul><li>Database Administration </li></ul><ul><ul><li>Connelly & Begg, chapter 9, section 9.15 </li></ul></ul><ul><ul><li>McFadden & Hoffer, chapter 13 </li></ul></ul><ul><li>Next week </li></ul><ul><ul><li>Database Security, Integrity and Recovery </li></ul></ul>

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