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Oracle Data Guard 11gR2 Administration Beginner's Guide by Nassyam Basha, Emre Baransel

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Time for action – preliminary tests before performing switchover

In order to perform switchover, we have to prepare and verify both the primary and standby databases. Perform the following steps:

  1. Check the standby redo logfile status on the primary database as follows:
    SQL> select group#,member,type from v$logfile where type='STANDBY';
    
        GROUP# MEMBER                                            TYPE
    ---------- ---------------------------------------------- -------
            ..   ........
         14 /u01/app/oracle/oradata/orcl/standby_redo05.log    STANDBY
         16 /u01/app/oracle/oradata/orcl/standby_redo06.log    STANDBY
    6 rows selected.

    Standby redo logfiles should have been created on the primary database; this is so that after performing switchover, the new standby database can receive redo using standby redo logfiles. ...

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