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Is Oracle Data Guard real time?
Data Guard Log Apply Services can automatically apply information from redo logs to standby databases, keeping data synchronized with the primary database. This facility of real time apply is a new feature introduced in Oracle database 10g.
Is Oracle Data Guard synchronous replication?
The advantages of physical replication in minimizing I/O impact also extend to the standby database where unlike logical replication, the Data Guard apply process does not generate local redo that must be written and archived to disk. Data Guard offers two choices of transport services: synchronous and asynchronous.
How do I stop MRP process?
To stop the MRP, issue the following sql statement. ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL; Earlier on RAC environments, MRP process can be run only from one instance on standby site.
What is Active Data Guard in Oracle?
Active Data Guard Oracle 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.
What is the purpose of Oracle Data Guard?
Oracle Data Guard ensures high availability, data protection, and disaster recovery for enterprise data. Oracle 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.
Is Data Guard a licensing?
Data Guard is a feature of the Oracle Database Enterprise Edition itself and does not require separate licensing. On the other hand, Active Data Guard is a so-called Oracle Database Enterprise Edition Option and as such requires separate licensing.
What is the difference between Data Guard and standby?
Dataguard : Dataguard is mechanism/tool to maintain standby database. 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 do I start and stop MRP?
8.1 Starting Up and Shutting Down a Physical Standby Database
- Start and mount the physical standby database: SQL> STARTUP MOUNT;
- Start Redo Apply or real-time apply: To start Redo Apply, issue the following statement: SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE 2> DISCONNECT FROM SESSION;
How do I start MRP in parallel?
This step used to setup parallel configuration in MRP process.
- Start MRP process with number of parallel process. ALTER DATABASE RECOVER MANAGED STANDBY DATABASE PARALLEL DISCONNECT FROM SESSION;
- Now check the MRP Active apply speed.
What to do if Oracle Data Guard is not available?
If the error indicates the standby database is not available, you need to restart the standby database. If the error indicates no listener, you need to restart the listener. If the error indicates the standby database has no local destination, you need to set up a standby location to store archived redo log files from the primary database.
What is broker log file in Oracle Data Guard?
Oracle Data Guard “broker log files” For each instance of each database in a broker configuration, the broker DMON process records important behavior and status information in a broker log file, useful in diagnosing Oracle Data Guard failures.
How to transfer data guard redo log tranport?
Log writer (LGWR) or archiver (ARCH) can be configured on the primary database site to transfer the redo data to the standby database. When LGWR is specified as the process responsible for transferring redo records, the Oracle instance receives redo data as it is being generated on the primary database.
How to disable fast start failover in Oracle Data Guard?
Connect to the target standby database and disable fast-start failover using the FORCE option if it is enabled. Connect to another physical standby database and attempt a broker complete failover. Perform a broker immediate failover to the target physical standby database.