The main difference between Oracle Data Guard and Active Data Guard is that Oracle Data Guard is an extension to the Oracle RDBMS that provides data availability and protection while Active Data Guard is an extension of Oracle Data Guard that improves the production database performance for critical transactions.

What is the difference between Data Guard and Active Data Guard?

The main difference between Oracle Data Guard and Active Data Guard is that Oracle Data Guard is an extension to the Oracle RDBMS that provides data availability and protection while Active Data Guard is an extension of Oracle Data Guard that improves the production database performance for critical transactions.

How do I create a standby database?

  1. Preparing the Primary Database for Standby Database Creation. Enable Forced Logging. Configure Redo Transport Authentication.
  2. Step-by-Step Instructions for Creating a Physical Standby Database. Create a Backup Copy of the Primary Database Datafiles. Create a Control File for the Standby Database.
  3. Post-Creation Steps.

How many standby databases we can create in 12c?

4. How many standby databases we can create (in 10g/11g)? Answer : Till Oracle 10g, 9 standby databases are supported.

How do you convert physical standby database to logical standby database?

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.

How do you stop and start logical standby database?

Recovering from a Failed DML Transaction

  1. First we must stop logical standby apply. alter database stop logical standby apply;
  2. Use the DBMS_LOGSTDBY. INSTANTIATE_TABLE procedure to put the table back in sync with the primary.
  3. Restart logical standby apply. alter database start logical standby apply;

How do I enable standby database?

Activate physical standby database

  1. Step 1 (Optional) Identify and resolve any gaps in the archived redo log files.
  2. Step 2 Initiate the failover operation on the target physical standby database.
  3. Step 3 Convert the physical standby database to the primary role.
  4. Step 4 Shut down and restart the new primary database.

How do I know if my standby database is primary?

How To Find All Standby Databases for a Primary Database in Data Guard. You can find all standby databases for a primary database in data guard by using one of the queries below. Standby -> Returns the unique name of the current database. Primary -> Returns the unique name of the other database in the Environment.

What is Active Data Guard 12c?

Active Data Guard includes new capabilities with Oracle Database 12c to allow writes to global temp tables and access to unique sequences at an active standby. This further expands the number of reporting applications that can be offloaded from a primary database.

What is logical and physical database?

A logical database must be able to access and identify all files within the storage system to operate correctly, whereas a physical database manages a much smaller field of information. Sometimes, a physical database stores only a single file with one value or word in it.

What is active standby database?

Active Standby Database In Oracle 11g. A Standby Database is an exact binary copy of an operational database on a remote server, ready to be used for backup, replication, disaster recovery, analysis, shadow environment and reporting, to name a few applications.

How do I create an active standby database?

How to build ACTIVE STANDBY DATABASE using RMAN DUPLICATE command in ORACLE DATABASE 12c.

  1. Primary database should be in archivelog mode.
  2. Initialization parameter “db_name” should be same on both primary and standby database.
  3. Initialization parameter “db_unique_name” should be different on primary and standby databases.

Who is a logical person?

A logical person uses precise language so that his listener knows exactly what he is talking about and can adequately evaluate the truth of his claims. If he refers to more complex terms such as “freedom” or “equality,” he makes sure to establish his particular understanding of those terms.

How do I start Active Data Guard?

Steps to Enable Active Data Guard Option

  1. Cancel The Redo Apply Process. SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;
  2. Shutdown and start the database in Mount Mode.
  3. Open the database in Read-Only Mode.
  4. Start the Redo Apply. (
  5. Now that the standby is in real-time query mode (the standby is open in read-only.

What is an example of logical?

The definition of logic is a science that studies the principles of correct reasoning. An example of logic is deducing that two truths imply a third truth. An example of logic is the process of coming to the conclusion of who stole a cookie based on who was in the room at the time.

How do you rearrange sentences in correct order?

Word Order in affirmative Sentences 2

  1. go / now / home / will / I →
  2. give / the present / tomorrow / we / him / will →
  3. her / met / last night / at / we / the station →
  4. was / last week / he / in hospital →
  5. in Greece / spend / I / will / next year / my holiday →
  6. must / at five o’clock / leave / we / the house →

How does Active Data Guard work?

Active Data Guard is a licensed option for Oracle Database Enterprise Edition. Data Guard automatically synchronizes the primary database and all standby databases by transmitting primary database redo – the information used by every Oracle Database to protect transactions – and applying it to the standby database.

How do I know if my Active Data Guard is enabled?

If you start a database in SQL*Plus using the STARTUP command and then invoke managed recovery, the Active Data Guard will be enabled.

What is MRP process in Data Guard?

Managed recovery process (MRP) The managed recovery process (MRP) applies information from the archived redo logs to the standby database. When performing managed recovery operations, log apply services automatically apply archived redo logs to maintain transactional synchronization with the primary database.

What is difference between physical and logical standby database?

Logical standby is different from physical standby: Logical standby database does not have to match the schema structure of the source database. Logical standby uses LogMiner techniques to transform the archived redo logs into native DML statements (insert, update, delete).