In order for redo log files to be archived, the Oracle RAC database must be in ARCHIVELOG mode. You can run the ALTER DATABASE SQL statement to change the archiving mode in Oracle RAC, because the database is mounted by the local instance but not open in any instances. You do not need to modify parameter settings to run this statement.
Note:
The ARCHIVELOG mode is set at the database level, not the instance level. Either all instances archive or none do.
You can also change the archive log mode by using the Recovery Settings page in the Maintenance tab of the Oracle Enterprise Manager Oracle RAC Database Home Page.
See Also:
Oracle Database Administrator's Guide for more information about setting the archiving mode