What is the difference between Oracle 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 and provides data availability and protection while Active Data Guard is an extension of Oracle Data Guard and improves the production database performance for critical transactions.
How do I turn off Active Data Guard?
Official Oracle support notice: “There is no way to disable ADG, just prevent its usage by ensuring the physical standby database is always mounted when Media Recovery (MRP) runs“.
What are the advantages of using Oracle Data Guard?
Advantages. Data Guard provides high availability for a database system. It can also reduce the human intervention required to switch between databases at disaster-recovery (“failover”) or upgrade/maintenance (“switchover”) time. Through the use of standby redo log files, Data Guard can minimize data loss.
How does Oracle Active Data Guard work?
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 query data Guard status?
HOW TO QUERY DATAGUARD STATUS
- SELECT DATABASE_ROLE, DB_UNIQUE_NAME INSTANCE, OPEN_MODE, PROTECTION_MODE, PROTECTION_LEVEL, SWITCHOVER_STATUS FROM V$DATABASE;
- On the standby database, query the V$ARCHIVED_LOG view to verify the archived redo log files were applied.
What is DataGuard in Oracle?
The software which Oracle Corporation markets as Oracle Data Guard forms an extension to the Oracle relational database management system ( RDBMS ). It aids in establishing and maintaining secondary standby databases as alternative/supplementary repositories to production primary databases.
What is Data Guard Oracle?
Definition. Oracle Data Guard is an extension to the Oracle RDBMS that helps to establish and maintain secondary standby databases as alternatives to the production primary databases.
How does Oracle 12c databases work?
How Oracle 12c Databases Work. By Chris Ruel, Michael Wessler. Databases have evolved over the years but have stabilized into the relational model. Oracle 12c uses this model. A relational database management system (RDBMS) stores data in logical structures called tables . A table is a logical container of similar data.
What are the Oracle 12c pluggable databases?
Pluggable databases are the new kid on the block, one of the newfangled features of 12 c. According to the documentation, a pluggable database (PDB) is a portable collection of schemas, schema objects, and non-schema objects that appear to an Oracle Net client as a separate database. One or more PDBs together are called a container database (CDB).