Role, Duties and Responsibilities of database Administrator ( DBA)
A Database Administrator
is a person or a group of persons who are responsible for managing all the
activities related to database system.
The following are the roles and responsibilities of a DBA :
1. Deciding the hardware device
Depending upon the cost, performance and
efficiency of the hardware, it is DBA who decides which
hardware devise will suit the organization requirements.
2. Managing Data Integrity
Data integrity should be managed accurately
because it protects the data from unauthorized use. DBA manages relationship
between the data to maintain data consistency.
3. Decides Data Recovery and
Back up method
It is the duty of database admin to regularly backup data, so that data is available even in case of failures. It is the responsibility of a DBA to backup database in regular time span. DBA has to
decide how frequently the back up should be taken. Also the recovery of data base is done by DBA if they have
lost the database.
4. Tuning Database Performance
Database performance plays an important role
for any business. If user is not able to fetch data speedily then it may loss
company business. So by tuning an modifying sql commands a DBA can improves the
performance of database.
5. Capacity Issues
All the databases have their limits of storing
data in it and the physical memory also has some limitations. DBA has to decide
the limit and capacity of database and all the issues related to it.
6. Database design
The logical design of the database is designed
by the DBA. Also a DBA is responsible for physical design, external model
design, and integrity control.
7. Database accessibility
DBA writes sub schema to decide the
accessibility of database. He decides the users of the database and also which
data is to be used by which user. No user has authorization to access the entire
database without the permission of DBA.
8. Decides validation checks on
data
DBA has to decide which data should be used
and what kind of data is accurate for the company. So he always puts validation
checks on data to make it more accurate and consistence.
9. Monitoring performance
DBA has monitor the performance of the database. A DBA monitors the CPU and memory usage and takes necessary actions to tune up the performance of Database.
10. Decides content of the
database
A database system has many kind of content
information in it. DBA decides fields, types of fields, and range of values of
the content in the database system. DBA decides the structure
of database files.
11. Database implementation
Database has to be implemented before it can be used. DBA implements the database system. DBA has to supervise
the database loading at the time of its implementation.
13. Improve query processing
performance
Queries made by the users should be performed
speedily. DBA
improves query processing by improving their performance.
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