What is the use of Oracle Data Guard?
Oracle Data Guard ensures high availability, data protection, and disaster recovery for enterprise data. Data Guard provides a comprehensive set of services that create, maintain, manage, and monitor one or more standby databases to enable production Oracle databases to survive disasters and data corruptions.
How can I check my dataguard 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 Oracle Data Guard 11g?
In 11g, Oracle introduced the Active Data Guard feature. This allows the standby database to be open in read-only mode, but still apply redo information. This means a standby can be available for querying, yet still be up to date.
How does Oracle 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.
What is the difference between RAC and Data Guard?
Data Guard and RAC both are different and serve different purpose. RAC is multiple instances accessing a single database with key features availability, scalability and manageability. Data Guard software maintains a real time copy of the production database called a standby database.
How do I check my OEM Data Guard status?
To check the primary database status, select Status under the Primary Database section of the Data Guard Overview page. To check the status of a standby database listed in the Standby Databases table, select the link under the Status column.
How do I know if my primary database has standby?
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.
What is Active Data Guard Oracle?
Active Data Guard is a comprehensive solution to eliminate single points of failure for mission critical Oracle Databases. It prevents data loss and downtime simply and economically by maintaining a synchronized physical replica (standby) of a production database (primary).
What is the difference between Oracle RAC and dataguard?
so the difference between the two is that rac is highly available whereas the dataguard ensures data integrity. Since if the one oracle instance in rac has problem, then a restore will be inevitable. no. If one node goes down, the other node will take over for it.
How do I connect to Dgmgrl?
ADD – Adds a standby database to the broker configuration.
- DGMGRL> ADD DATABASE db_name [AS CONNECT IDENTIFIER IS conn_identifier] [MAINTAINED AS {PHYSICAL|LOGICAL}];
- DGMGRL> CONNECT username/password[@connect_identifier]
- DGMGRL> CONVERT DATABASE database_name TO {SNAPSHOT STANDBY|PHYSICAL STANDBY};
What is Data Guard in Oracle?
Oracle Data Guard is a feature of the Oracle Relational Database Management System (RDBMS). It helps to establish and maintain secondary standby databases as an alternative repository to produce primary databases.
What is Data Guard?
Data Guard. Data Guard provides the management, monitoring, and automation software to create and maintain one or more synchronized copies of a production database to protect Oracle data from failures, disasters, human error, and data corruptions while providing high availability for mission critical applications.
What is Data Guard replication?
In Oracle Data Guard, a data replication resource is enabled when the protection group is activated in the cluster. Consequently, in Oracle Data Guard, in a cluster in which the protection group is deactivated, the data replication status appears as unknown.