Active dataguard means, the standby database is open with read only mode, even when redo logs are getting applied in real time.

Below are the benefit of using active dataguard.

  • Reporting queries can be offloaded to standby database.
  • Physical block corruptions are repaired automatically either at primary or physical standby database.
  • RMAN backups can be initiated from standby , instead  of primary which will reduce cpu load from primary.
  • NOTE - To use active dataguard, you need additional license from oracle

    Let-s say we have a physical standby database which is in mount state. Implement below steps to enable active dataguard database.

     

    1. Cancel the media recovery on physical standby.

    SQL> alter database recover managed standby database cancel;
    
    

    2. Open the database[PHYSICAL STANDBY]

    SQL> alter database open;
    
    Database altered.
    

    3. Start media recovery with real-time log apply[PHYSICAL STANDBY]

    SQL> alter database recover managed standby database using current logfile disconnect from session;
    
    Database altered.
    
    

    4. Check the database status:[PHYSICAL STANDBY]

    SQL> select name,open_mode from v$database;
    
    NAME      OPEN_MODE
    --------- --------------------
    PRODDB   READ ONLY WITH APPLY
    
    
    
    SQL> select process,status,sequence# from v$managed_standby;
    
    PROCESS   STATUS        SEQUENCE#
    --------- ------------ ----------
    ARCH      CONNECTED             0
    ARCH      CONNECTED             0
    ARCH      CONNECTED             0
    ARCH      CONNECTED             0
    ARCH      CONNECTED             0
    RFS       IDLE                  0
    RFS       RECEIVING           510
    RFS       IDLE                  0
    RFS       IDLE               4178
    MRP0      APPLYING_LOG        510 --->>>>  MRP PROCESS 
    
    

    Now active dataguard has been enabled.

    dataguard DATAGUARD


    Related Topics

    How to disable enable log shipping in standby using dgmgrl
    How to add a tempfile in primary database in dataguard
    Standby redologs in oracle dataguard
    How to enable active dataguard in physical standby database
    How to setup dataguard broker configuration (DG broker) in 12c
    Flashback primary database in dataguard environment
    How to recreate physical standby controlfile
    Useful DGMGRL commands in oracle dataguard
    How to use expdp to export data from physical standby database

    You May Also Like

    DEFERRED_SEGMENT_CREATION parameter in oracle
    TNS-12542: TNS:address already in use
    Oswatcher tool for collecting server diagnostic information
    ORA-16855: transport lag has exceeded specified threshold
    Get sid from ospid
    ORA-20101: TABLESPACE is not a ASSM (Automatic Segment Space Management) tablespace
    How to add a tempfile in primary database in dataguard
    ESTIMATE REQUIRED DISK SPACE FOR EXPORT USING estimate_only
    Oracle database Security Assessment Tool
    Setting up Table replication in oracle goldengate

    From This Website

    Useful flashback related commands
    SETUP ORACLE 18C DATABASE - STEP BY STEP
    Oracle database Security Assessment Tool
    How to change flash recovery area location
    ORA-02304: invalid object identifier literal while import with CREATE TYPE OID
    How to enable active dataguard in physical standby database
    How to recreate physical standby controlfile
    Install oracle enterprise manager cloud control 12c
    Script to get cpu usage and wait event information in oracle database
    SGA TARGET ADVISORY IN ORACLE