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PRESENTATION       ONDatabase Fragmentation
Views about this statementA transaction can be executed by multiplenetworked computers in a unified manner.
DDBMS ? To understand DDBMS…..o Databaseo DBMS
DDBMS
Database Fragmentation
Data Fragmentation“Data fragmentation allows you to break a single       object into two or more segments.”The object migh...
Why Fragments ?UsageEfficiencySecurityParallelism
Storage of Fragments in DDBMSEach fragment can be stored at any site overnetwork .Information about data fragmentation is ...
Types of Data FragmentationHorizontal fragmentationVertical fragmentationMixed fragmentation
Horizontal Fragmentation:XYZ Company’s management requiresinformation about its customers in all threestates.States are:- ...
Horizontal Fragmentation:
Horizontal Fragmentation:
Vertical FragmentationCompany’s management requires informationabout its customers in Two Departments.Two departments: the...
Vertical Fragmentation
Vertical Fragmentation
Mixed FragmentationCompany’s structure requires that theCUSTOMER data be fragmented horizontally toaccommodate the various...
Advantages of FragmentationReflects organizational structureImproved share ability and local autonomyImproved availability...
Limitations of FragmentationComplexityCostSecurityIntegrity control more difficultLack of standardsLack of experienceDatab...
Bibliography
Presented By:Ravisha Sethi
Database fragmentation
Database fragmentation
Database fragmentation
Database fragmentation
Database fragmentation
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Database fragmentation

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Database Fragmentation

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Database fragmentation

  1. 1. PRESENTATION ONDatabase Fragmentation
  2. 2. Views about this statementA transaction can be executed by multiplenetworked computers in a unified manner.
  3. 3. DDBMS ? To understand DDBMS…..o Databaseo DBMS
  4. 4. DDBMS
  5. 5. Database Fragmentation
  6. 6. Data Fragmentation“Data fragmentation allows you to break a single object into two or more segments.”The object might be:- o User’s database. o System database. o A table
  7. 7. Why Fragments ?UsageEfficiencySecurityParallelism
  8. 8. Storage of Fragments in DDBMSEach fragment can be stored at any site overnetwork .Information about data fragmentation is storedin (DDC) .DDC is accessed by the TP to process userrequests .
  9. 9. Types of Data FragmentationHorizontal fragmentationVertical fragmentationMixed fragmentation
  10. 10. Horizontal Fragmentation:XYZ Company’s management requiresinformation about its customers in all threestates.States are:- TN FL GARequirement:- Data regarding local customers only.
  11. 11. Horizontal Fragmentation:
  12. 12. Horizontal Fragmentation:
  13. 13. Vertical FragmentationCompany’s management requires informationabout its customers in Two Departments.Two departments: the service department andthe collections department.Each department has an interest in only a few ofthe CUSTOMER table’s attributes .
  14. 14. Vertical Fragmentation
  15. 15. Vertical Fragmentation
  16. 16. Mixed FragmentationCompany’s structure requires that theCUSTOMER data be fragmented horizontally toaccommodate the various company locations.Within the locations, the data must befragmented vertically to accommodate the twodepartments.
  17. 17. Advantages of FragmentationReflects organizational structureImproved share ability and local autonomyImproved availabilityImproved reliabilityImproved performanceEconomics
  18. 18. Limitations of FragmentationComplexityCostSecurityIntegrity control more difficultLack of standardsLack of experienceDatabase design more complex
  19. 19. Bibliography
  20. 20. Presented By:Ravisha Sethi

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