Data Guard switchover with dgmgrl
  1. Ensure SPFILE is used.
  2. Verify dmon process is running and broker parameters viz.
  3. Check if LOCAL_LISTENER is set(This is needed only if you are non-default port other than 1521)
  4. Verify if GLOBAL_DBNAME in listener.ora is set correctly to.
  5. Verify if START_OPTIONS is set to MOUNT in the OCR.

Similarly, you may ask, how do I change from primary to standby database?

Switchover to Physical Standby Database in Oracle 11g

  1. Step 1 : Verify whether it is possible to perform a switchover.
  2. Step 2 : Check that there is no active users connected to the databases.
  3. Step 3 : Switch the current online redo log file on primary database and verify that it has been appleid.
  4. Step 4 : Connect with primary database and initiate the switchover.

Additionally, how do I remove standby database from Dgmgrl?

  1. dgmgrl> disable database <db_unique_name>; << The Standby db_unique_name you are removing. dgmgrl> remove database <db_unique_name>;
  2. show parameter log_archive_dest_n << replace 'n' with the # for the Standby Redo transport destination to make sure it's removed.
  3. show parameter log_archive_config.

Subsequently, one may also ask, how do I change my Oracle database from primary to standby?

if the command failed (it shouldn't), try this one: SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE FINISH SKIP STANDBY LOGFILE; Step 3 Convert the physical standby database to the primary role. SQL> ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY; Step 4 Shut down and restart the new primary database.

How do I upgrade a primary database and a physical standby to Oracle 12c?

Upgrade Database to 12.2 with Physical Standby

  1. Environment.
  2. Disable DG Broker.
  3. Apply latest PSU on 11.2.0.4 on both primary and standby (click below for example)
  4. Install 12.2 database software on standby.
  5. Install 12.2 database software on primary.
  6. Apply latest Release Update on 12.2.0.1 on standby.
  7. Apply latest Release Update on 12.2.0.1 on primary.
  8. Run preupgrade script.

Related Question Answers

How do I enable standby database?

Activate the standby database:

SQL> ALTER DATABASE ACTIVATE PHYSICAL STANDBY DATABASE; Database altered.

How do you use DR drill in Oracle?

DR Drill in Manual standby Database by manual log shipping
  1. 1) Login into the Production Application Server and stop application services.
  2. 3) Login as SYSDBA and transfer all the archived logs to DR Database server, and it should be in sync,by doing the log shipping activity from production to standby DB.

How do you failover a dataguard?

Performing failover :

Step 1: Check Standby Database role. Step 2: Apply the following command to finish database recovery. SQL> alter database recover managed standby database finish; Database altered. Step 3: Use the following command to activate standby database to a primary.

How do you do a switchover in dataguard?

Oracle 12c-Step by Step Manual Data Guard Switchover
  1. Primary database:-
  2. Precheck for Switchover:-
  3. Step 2:- ALTER SESSION SET nls_date_format='DD-MON-YYYY HH24:MI:SS';
  4. Step 3:- select switchover_status from v$database;
  5. Step 5:-
  6. Step 6:-select name,open_mode,database_role from v$database;
  7. Step 7:-alter database commit to switchover to primary;

What is database switchover?

A switchover is a role reversal between the primary database and one of its standby databases. A switchover guarantees no data loss. This is typically done for planned maintenance of the primary system.

How do I know if my standby database is primary?

You can use the DGMGRL show configuration and show database database_name commands to confirm the Data Guard Standby database configuration before enabling a standby database. Here is how you enable your primary and standby databases using the DGMGRL command: DGMGRL> enable configuration; Enabled.

How do I know if my standby database is in sync with a primary database?

Oracle

DBA - A Helping Hand.

  1. Step 1 : Check the status of database on both server.
  2. Step 2 : Check for GAP on Standby.
  3. Step 3 & 4: Check redo received and applied on standby.
  4. Step 5: Identify the missing archive log file.
  5. Step 6: Copy missing archive log file.
  6. Step 7: Register archive logfile with standby.

How do I open a standby database when the primary database is lost?

Below are the steps to convert standby database to Primary database.
  1. 1.) Open standby database in mount state :
  2. 2.) Recover if there is any archive logs:
  3. cancel.
  4. 3.) Finish the Recovery process :
  5. 4.) Activate the Standby Database :
  6. 5.) Check the new status.
  7. 6.) Open the Database.

How do I restore a standby database?

Recover the database using the AUTOMATIC option: SQL> ALTER DATABASE RECOVER AUTOMATIC STANDBY DATABASE; The AUTOMATIC option automatically generates the name of the next archived redo log file needed to continue the recovery operation.

How do you stop MRP in standby database?

To stop the managed recovery, the Cancel command can be issued on the standby database. The complete statement is: ALTER DATABASE RECOVER MANAGED Oracle instance CANCEL; This statement will stop the MRP.

How do I manually add a datafile in Oracle standby database?

SQL> alter database create datafile '/u01/app/oracle/product/10.2. 0/db_1/dbs/UNNAMED00135' as '/oradata2/prod/APP_INDEX_SPACE2-02. dbf'; Database altered.

How do I check my MRP process in standby database?

Please query v$managed_standby from the standby database if MRP is started.
  1. % ps -ef |grep -i mrp.
  2. PROCESS THREAD# SEQUENCE# STATUS.
  3. SQL>recover managed standby database cancel;
  4. DGMGRL> EDIT DATABASE '<standby db_unique_name>' SET STATE='APPLY-OFF';

How do you change screenshots in standby?

This can be done by issuing the below SQL command in the physical standby database. Once it is converted the database can be opened in read/write mode. A physical standby database that is managed by the Data Guard broker can be converted into a snapshot standby database using either DGMGRL or Oracle Enterprise Manager.

How do I disable Dgmgrl configuration?

  1. Remove broker configuration from DGMGRL command line using sys user from primary database.
  2. In primary database set the db_broker_start parameter false.
  3. Check the archive log destination in primary database.
  4. In standby database set the db_broker_start parameter false.

What is Dgmgrl?

The Data Guard command-line interface (DGMGRL) enables you to manage a Data Guard broker configuration and its databases directly from the command line, or from batch programs or scripts.

How do I remove Data Guard configuration?

How to Safely Remove a Data Guard Broker Configuration under RAC/NON-RAC setup
  1. 1) Remove the Data Guard Broker Configuration.
  2. 2) On the primary database set dg_broker_start=false:
  3. 3) On the primary disable any archive destinations that are archiving to the standby:

How can I check my dataguard status?

HOW TO QUERY DATAGUARD STATUS
  1. SELECT DATABASE_ROLE, DB_UNIQUE_NAME INSTANCE, OPEN_MODE, PROTECTION_MODE, PROTECTION_LEVEL, SWITCHOVER_STATUS FROM V$DATABASE;
  2. On the standby database, query the V$ARCHIVED_LOG view to verify the archived redo log files were applied.
  3. SELECT SEQUENCE#,APPLIED FROM V$ARCHIVED_LOG ORDER BY SEQUENCE#;

How do I connect to Dgmgrl?

DGMGRL> ADD DATABASE 'logdb' AS CONNECT IDENTIFIER IS logdb MAINTAINED AS LOGICAL; DGMGRL> ADD DATABASE 'devdb' AS CONNECT IDENTIFIER IS devdb.foo.com; CONNECT - Connects to an Oracle database instance. CONVERT - Converts a database from one type to another (from Oracle 11g).

Where is Data Guard broker log?

In order to investigate any issues around Data Guard broker, it has its own log files we can find them in same diag destination where the alert log is located with the file name drc$ORACLE_SID.

How do I check my Dgmgrl configuration?

You can enable the entire configuration, including all of the databases, with the following command: DGMGRL> ENABLE CONFIGURATION; Enabled. Show the configuration. Enable the database.

What is DG broker in Oracle?

Oracle Data Guard Broker is a centralized framework that automates the configuration, management, and monitoring of an Oracle Data Guard configuration. Oracle Data Guard Broker further enhances Oracle RAC by providing apply instance failover for Oracle RAC standby databases.

How do I enable DG broker configuration?

How to setup Data Guard Broker Configuration
  1. Check the current state of DG Broker on Primary Database.
  2. Check the current state of DG Broker on Standby Database.
  3. Vefiry GAP.
  4. Enable DG broker.
  5. Modify Listener.ora.
  6. Create the Dataguard Broker configuration on primary.

How do you convert physical standby to logical standby?

STEPS TO CONVERT PHYSICAL STANDBY IN TO LOGICAL STANDY DATABASE
  1. create a physical standby database.
  2. stop redoapply on physical standby database.
  3. prepare primary database to support a logical standby database.
  4. Build a logminer dictionary in the redo data.
  5. Transition to a logical standby database.

What is rolling upgrade in Oracle?

A Rolling Upgrades and Patches. Oracle Fail Safe allows a cluster system to continue to provide service while the software is being upgraded to the next release. This process is called a rolling upgrade because each node is upgraded and restarted in turn, until all server nodes and all client nodes have been upgraded.

How do I turn off Data Guard?

Enable and Disable the Oracle dataguard
  1. Disable Data Guard. On Standby Database: Cancel the Recovery job with following command.
  2. For Shutdown the dataguard environment. On Standby Database: Cancel the Recovery process with following command.
  3. Start the database of dataguard environment: On Standby Database: startup the Standby database upto mount state.