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Flash Recovery Area: Concepts
Storage area for all recovery-related files
- Redo logs , Archive logs
- Control file backups
- RMAN backups
- Flashback logs
Optional, but Oracle recommends
- Required for Flashback Database and Guaranteed Restore Points
Use file system or ASM
Put on separate disks from datafile and log disks
Notes:
The Flash Recovery Area, introduced with Oracle 10g Release 1, is an optional (but recommended) storage area for many types of recovery-related files. In addition to redo logs, archive logs, RMAN backupsets, this includes flashback logs, required for the FLASHBACK DATABASE statement. You will learn more about flashback logs and the FLASHBACK DATABASE statement later in this course.
The flash recovery area is optional. However, it is required for the 10g features Flashback Database and Guaranteed Restore Points, discussed in more detail later in this lesson.
The flash recovery area can be created on a OS file system or on Automated Storage Management (ASM) disks. ASM is the new integrated file and volume management system included in all editions of Oracle 10g. Refer to the Automated Storage Management lesson in this course for more information on ASM.
Whatever type of file system chosen, DBAs will want to create the flash recovery area on separate disks from the datafile and redo log disks. This will prevent the loss of both the primary database files and the backups (and flashback logs) if a disk fails.