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...Archiver – ARCn
8i and up provides duplexing capabilities
- Up to 10 destinations!
- Can write to standby database
- Standby can automatically apply
Can start multiple ARCn processes
- See LOG_ARCHIVE_MAX_PROCESSES parameter
Notes:
Oracle8i introduced archive log duplexing via the LOG_ARCHIVE_DUPLEX_DEST or LOG_ARCHIVE_DEST_N parameters. Up to 10 locations can be specified.
The archive location can also be a standby database, which can then optionally automatically apply the logs. See the Oracle9i Data Guard Concepts and Administration manual for more information on the Data Guard option and standby databases.
Because so many destinations can be specified, which translates into work, multiple ARCn processes can be started. This is a tuning issue. For more information refer to the Oracle9i Database Reference (see the LOG_ARCHIVE_MAX_PROCESSES parameter) and Chapter 22 of the Oracle9i Database Performance Tuning Guide and Reference.