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These occupants in the flash recovery area

原创 IT综合 作者:shiyihai 时间:2007-11-28 10:32:23 0 删除 编辑

All the files needed to recover a database from a media failure or a logical error are contained in the flash recovery area. The files that can reside in the flash recovery area are as follows:

Control files
A copy of the control file is created in the flash recovery area when the database is created. This copy of the control file can be used as one of the mirrored copies of the control file to ensure that at least one copy of the control file is available after a media failure.

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Archived log files
When the flash recovery area is configured, the initialization parameter LOG_ARCHIVE_DEST_10 is automatically set to the flash recovery area location. The corresponding ARCn processes create archived log files in the flash recovery area and any other defined LOG_ARCHIVE_DEST_n locations.
Flashback logs
If Flashback Database is enabled, then its flashback logs are stored in the flash recovery area.
Control file and SPFILE autobackups
The flash recovery area holds control file and SPFILE autobackups generated by RMAN, if RMAN is configured for control file autobackup. When RMAN backs up datafile #1, the control file is automatically included in the RMAN backup.
Data file copies
For RMAN BACKUP AS COPY image files, the default destination is the flash recovery area.
RMAN backup sets
By default, RMAN uses the flash recovery area for both backup sets and image copies. In addition, RMAN puts restored archive log files from tape into the flash recovery area in preparation for a recovery operation.

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