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

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Time for action – converting to a snapshot standby database

Perform the following steps to convert a physical standby database to a snapshot standby database:

  1. To convert a physical standby database to a snapshot standby database, flashback should be enabled and the database should be brought to the MOUNT status after cancelling recovery as follows:
    SQL> select open_mode,database_role,flashback_on from v$database;
    OPEN_MODE            DATABASE_ROLE    FLASHBACK_ON
    -------------------- ---------------- ------------------
    MOUNTED              PHYSICAL STANDBY YES
  2. Now process the following command to convert the physical standby database to a snapshot standby database:
    SQL> ALTER DATABASE CONVERT TO SNAPSHOT STANDBY;
    Database altered.
    SQL> 
    Wed Nov 07 20:10:27 2012
    ALTER DATABASE ...

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