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Database Administration: The Complete Guide to DBA Practices and Procedures, Second Edition by Craig S. Mullins

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8. Data Availability

Availability is the holy grail of database administrators. If the data is not available, the applications cannot run. If the applications cannot run, the company loses business. Therefore, DBAs are responsible for doing everything in their power to ensure that databases are kept online and operational. This has been the duty of the DBA since the first days of the database.

However, the need for availability is increasing. The age of the long batch window, where databases can be offline for extended periods to perform nightly processing, is over. Contributing to the trend of continual availability is the adoption of e-business. Coupling businesses to the Internet has dramatically altered the way we do business. It has created ...

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