Thursday, July 29, 2010

Responsibilities of Oracle DBA

Role and responsibilities of DBA
If you want to become an oracle DBA, you should first understand what an Oracle DBA’s jobs is. The basic roles of the DBA are fairly consistent among different companies, but these duties might be expanded based on the size of the company and the experiences, of the DBA. In fact, the DBA is considered the main resource for DBMS experience and knowledge in many companies.

Let’s look at these roles and responsibilities and determine what skills are necessary to fulfill these duties. Here the roles and responsibilities are divided into two categories: basic duties and additional duties. The dividing line between these is not clear; there is significant overlap.

Basic Duties of the DBA

Here are some of the basic roles of the Oracle DBA. This is not an all-inclusive list. Depending on your installation and stall, your duties might not include all of these, or might include many more items. This section in simply intended as a general guide.

1)Installation of new software:

It is primarily the job of the DBA to install new versions of Oracle software, application software, and other software related to DBMS administration. It is important that the DBA or other IS staff ,members test this new software before it moved into a production environment.

2)Configuration of hardware/software administrator:

To many cases the system software can only be accessed by the system administrator. In this case, the DBA must work closely with the system administrator to perform software installations, and to configure with DBMS.

3)Security administration:

One of the main duties of the DBA is on monitor and administer DBMS security. This involves adding and removing users, administering quotas, auditing, and checking for security problems.

4)Performance Tuning and Monitoring:

The DBA must continually monitor system performance and be prepared to retune the system as necessary. Even a well-tuned system must be constantly monitored and adjusted. Sometimes this involves changing tuning parameters, other times this involves rebuilding an index or restructuring a table.

5)Backup and recovery:

Perhaps the most important responsibility of the DBA is effective the data in the system. To effectively do this, you must develop an effective backup and recovery strategy and make sure it is carried out. A DBA’s chief responsibility is to maintain the integrity of the database. It is important that the backup and recovery process be periodically tested.

6)Routine scheduled maintenance:

It is the job of the DBA to schedule routine DBMS maintenance and early out this maintenance and carry out this maintenance. This maintenance is regularly carried out in the early hours of the morning or on weekends when this maintenance causes the least inconvenience to the user community.

Additional Duties of the DBA

Some of the more advanced duties of the Oracle DBA might include the following:

1)Data analysis:

The DBA will frequently be called on to analyze the data stored in the database and to make recommendation relating to performance and efficiency of that data storage. This might relate to the more effective use of indexes or the use of some feature such as the Parallel Query option.

2)Database design:

The DBA is often involved at the preliminary database-design stages. Through the involvement of the DBA, many problems that might can be eliminated. The DBA knows the DBMS and system, can point out potential problems, and can help the development team with special performance considerations.

3)Data modeling and optimization:

By modeling the data, it is possible to optimize the system layout to make the most advantage of your I/O subsystem.

4)Assisting developers with SQL and stored procedure development:

The DBA should be prepared to be a resource for developers and users. The DBA is often called on to help with SQL problems as well as to design and write stored procedures.

5)Enterprise standards and naming conventions:

Because many different groups might perform different roles in developing and deploying applications, it is often the DBA who is called on to help define enterprise standards and naming conventions as well as to ensure that new application are conforming to these standards.

6)Development of production migration procedures:

Because the DBA is responsible for the availability and reliability of the DBMS and application using that DBMS, it is up to the DBA to develop and maintain procedures for rolling out new applications and DBMS software. This involves evaluating new software or patches as well as testing them. It is up to the DBA to guarantee the stability and robustness of the system.

7)Evaluation of new software:

The DBA might be called on to evaluated new software and make recommendations based on that evaluation. This might be related to a software purchase rollout of new version of software. This evaluation must be done in the context of the stability of the system. It is your responsibility to maintain system stability and reliability.


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