DBA_Roles_and_Responsibilities control.pptx

A Database Administrator (DBA) is a person responsible for the installation, configuration, maintenance, and security of a database system.
The DBA ensures that the database is available, consistent, secure, and performs efficiently.

1. Database Administrator (DBA) Roles and Responsibilities Dr. N. Sumathi, Sri Ramakrishna College of Arts & Science

2. Central Role of the DBA DBA has central control over the database system. Ensures data integrity, security, and performance. Dr. N. Sumathi, Sri Ramakrishna College of Arts & Science

3. Functions of DBA Schema definition Storage structure and access-method definition Schema and physical-organization modification Granting of authorization for data access Routine maintenance Periodically backing up the database Ensuring that enough free disk space is available for normal operations, and upgrading disk space as required Monitoring jobs running on the database Dr. N. Sumathi, Sri Ramakrishna College of Arts & Science

4. Key Responsibilities (1-2) 1. Schema Design and Maintenance - Defines logical structure (tables, keys, relationships). - Updates schema as per evolving needs. 2. Physical Schema & Organization Modification - Optimizes physical data storage and file structures. - Improves speed using indexing, partitioning. Dr. N. Sumathi, Sri Ramakrishna College of Arts & Science

5. Key Responsibilities (3-4) 3. Authorization and Security - Controls user access with privileges and roles. - Implements security (encryption, audit, firewalls). 4. Integrity Constraint Specification - Enforces data rules (e.g., primary/foreign keys, checks). - Prevents invalid or inconsistent data. Dr. N. Sumathi, Sri Ramakrishna College of Arts & Science

6. Key Responsibilities (5-6) 5. Recovery from Failure - Manages backups and restores data after crashes. - Handles transaction logs and disaster recovery. 6. Database Upgradation - Applies updates and patches to DBMS software. - Migrates to newer versions with minimal downtime. Dr. N. Sumathi, Sri Ramakrishna College of Arts & Science