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Ch 13 D B Admin

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Data and Database Administration Modern Database Management Jeffrey A. Hoffer, Mary B. Prescott, Fred R. McFadden
Definitions ,[object Object],[object Object]
Data Administration Functions ,[object Object],[object Object],[object Object],[object Object],[object Object]
Database Administration Functions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data Warehouse Administration ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Database Security ,[object Object],[object Object]
Figure 12-2: Possible locations of data security threats
Threats to Data Security ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data Management Software Security Features ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Views and Integrity Controls ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Authorization Rules ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Figure 12-3: Authorization matrix
Some DBMSs also provide capabilities for user-defined procedures to customize the authorization process Figure 12-4(a): Authorization table for subjects (SALESPERSONS) Figure 12-4(b): Authorization table for objects (ORDER RECORDS) Figure 12-5: Oracle8i privileges
Authentication Schemes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Database Recovery ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Backup Facilities ,[object Object],[object Object],[object Object],[object Object],[object Object]
Journalizing Facilities ,[object Object],[object Object],[object Object],[object Object],[object Object],Produces an audit trail
Figure 12-6: Database audit trail From the backup and logs, databases can be restored in case of damage or loss
Checkpoint Facilities ,[object Object],[object Object],[object Object],This allows recovery manager to resume processing from short period, instead of repeating entire day
Recovery and Restart Procedures ,[object Object],[object Object],[object Object],[object Object],[object Object]
Figure 12-7: Basic recovery techniques (a) Rollback
Figure 12-7(b) Rollforward
Database Failure Responses ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Concurrency Control ,[object Object],[object Object],[object Object]
Figure 12-8: LOST UPDATE Simultaneous access causes updates to cancel each other A similar problem is the inconsistent read problem
Concurrency Control Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Figure 12-9: Updates with locking for concurrency control This prevents the lost update problem
Locking Mechanisms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Deadlock ,[object Object],Figure 12-11 A deadlock situation UserA and UserB will wait forever for each other to release their locked resources!
Managing Deadlock ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Versioning ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Figure 12-12: the use of versioning Better performance than locking
Managing Data Quality ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data Dictionaries and Repositories ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Figure 12-13: Three components of the repository system architecture A schema of the repository information Software that manages the repository objects Where repository objects are stored Source : adapted from Bernstein, 1996.
Database Performance Tuning ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Ch 13 D B Admin

  • 1. Data and Database Administration Modern Database Management Jeffrey A. Hoffer, Mary B. Prescott, Fred R. McFadden
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  • 7. Figure 12-2: Possible locations of data security threats
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  • 13. Some DBMSs also provide capabilities for user-defined procedures to customize the authorization process Figure 12-4(a): Authorization table for subjects (SALESPERSONS) Figure 12-4(b): Authorization table for objects (ORDER RECORDS) Figure 12-5: Oracle8i privileges
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  • 18. Figure 12-6: Database audit trail From the backup and logs, databases can be restored in case of damage or loss
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  • 21. Figure 12-7: Basic recovery techniques (a) Rollback
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  • 25. Figure 12-8: LOST UPDATE Simultaneous access causes updates to cancel each other A similar problem is the inconsistent read problem
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  • 27. Figure 12-9: Updates with locking for concurrency control This prevents the lost update problem
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  • 32. Figure 12-12: the use of versioning Better performance than locking
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  • 35. Figure 12-13: Three components of the repository system architecture A schema of the repository information Software that manages the repository objects Where repository objects are stored Source : adapted from Bernstein, 1996.
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