To make a manual backup, you can either specify mode when the database is closed and in a consistent state.
The script shown in Example 9-8 puts the database into the correct mode for a consistent, whole database backup and then backs up the database.
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Tags are stored in uppercase, regardless of the case used when entering them. Tags cannot use operating system environment variables or use special formats such as command.
RMAN compresses the backup set contents before writing them to disk.
You can tag backup sets, proxy copies, data file copies, or control file copies.
For example, you can tag data file copies that you intend to use in a .
or disaster occurs, then you can restore your backups and recover lost changes.
You can also make backups to preserve data for long-time archival, as explained in "Making Database Backups for Long-Term Storage", and to transfer data, as explained in the chapters included in Part III, "Transferring Data with RMAN".
You can offload all backups of database files, including control file backups, to a , then RMAN determines the destination device, locations for backup output, and a backup tag automatically based on your configured environment and built-in RMAN defaults.
You can also provide arguments to RMAN can create backups on disk as image copies or as backup sets.
For example, assume that you archive logs 121 through 124 to two destinations: Before beginning the backup, RMAN switches out of the current redo log group, and archives all online redo logs that have not yet been archived, up to and including the redo log group that was current when the command was issued.