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database administration
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database administration concepts
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Who is DBA?A Database Administrator, Database Analyst or Database Developer is the person responsible for
managing the information within an organization. As most companies continue to experience
inevitable growth of their databases, these positions are probably the most solid within the IT
industry. The DBA has many different responsibilities, but the overall goal of the DBA is to keep the
server up at all times and to provide users with access to the required information when they need it.
The DBA makes sure that the database is protected and that any chance of data loss is minimized.
A DBA can be:
A programmer who, by default or by volunteering, took over the responsibility of maintaining
an SQL Server during project development and enjoyed the job so much that he switched.
A DBA can be a system administrator who was given the added responsibility of maintaining
an SQL Server. DBAs can even come from unrelated fields, such as accounting or the help
desk, and switch to Information Systems to become DBAs.
DBA Responsibilities
The following sections examine the responsibilities of the database administrator and how they
translate to various SQL Server tasks.
1. Installing and Upgrading an SQL Server
The DBA is responsible for installing SQL Server or upgrading an existing SQL Server. In the
case of upgrading SQL Server, the DBA is responsible for ensuring that if the upgrade is not
successful, the SQL Server can be rolled back to an earlier release until the upgrade issues can be
resolved.
The DBA is also responsible for applying SQL Server service packs. A service pack is not a true
upgrade, but an installation of the current version of software with various bug fixes and patches
that have been resolved since the product's release.
2. Monitoring the Database Server's Health and Tuning Accordingly
Monitoring the health of the database server means making sure that the following is done:
The server is running with optimal performance.
The error log or event log is monitored for database errors.
Databases have routine maintenance performed on them, and the overall system has periodic
maintenance performed by the system administrator.
3. Using Storage Properly
SQL Server enables you to automatically grow the size of your databases and transaction logs, or
you can choose to select a fixed size for the database and transaction log. Either way, maintaining
the proper use of storage means monitoring space requirements and adding new storage space
(disk drives) when required.
4. Performing Backup and Recovery Duties
Backup and recovery are the DBA's most critical tasks; they include the following aspects:
Establishing standards and schedules for database backups
Developing recovery procedures for each database
Making sure that the backup schedules meet the recovery requirements
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