In addition, archived
redo logs can be sent to a standby database (explained in Chapter 10) to which they
may be applied.
134 | Chapter 5: Managing Oracle
Recovery Manager, also known as RMAN, first introduced in Oracle8 and greatly
enhanced since, provides an easy-to-use frontend to manage this process. RMAN is
accessible today through Enterprise Manager.
Types of Backup and Recovery Options
There are two major categories of backup:
Full backup
Includes backups of datafiles, datafile copies, tablespaces, control files (current
or backup), or the entire database (including all datafiles and the current control
file). Reads entire files and copies all blocks into the backup set, skipping only
datafile blocks that have never been used (with the exception of control files and
redo logs where no blocks are skipped).
Incremental backup
Includes backups of datafiles, tablespaces, or the whole database. Reads entire
files and backs up only those data blocks that have changed since a previous
backup.
You can begin backups through the Recovery Manager or the Oracle Enterprise
Manager interface to RMAN, which uses the database export facility, or you can initiate
backups via standard operating system backup utilities.
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