Oracle fortunately provides automated support for
data replication, which is covered in the later section entitled ???Complete Site
Failure.???
Recovering from Failures | 275
Recovering from Failures
Despite the prevalence of redundant or protected disk storage, media failures can
and do occur. In cases in which one or more Oracle datafiles are lost due to disk failure,
you must use database backups to recover the lost data.
There are times when simple human or machine error can also lead to the loss of
data, just as a media failure can. For example, an administrator may accidentally
delete a datafile, or an I/O subsystem may malfunction, corrupting data on the disks.
The key to being prepared to handle these types of failures is implementing a good
backup-and-recovery strategy and understanding the power of Oracle??™s newer features
such as Flashback.
Developing a Backup-and-Recovery Strategy
Proper development, documentation, and testing of your backup-and-recovery strategy
is one of the most important activities in implementing an Oracle database.
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