What is Oracle RAC and Data Guard?

What is Oracle RAC and Data Guard?

DataGuard is mainly for disaster recovery, i.e. standby database whereas RAC is for load balancing. With RAC, you do not have a disaster recovery database, if the database dies, it dies regardless of whether your instances are up or not.

What is Data Guard configuration?

The VALID_FOR attribute enables you to configure destination attributes for both the primary and the standby database roles in one server parameter file (SPFILE), so that the Data Guard configuration operates properly after a role transition.

Is Oracle Data Guard included with Enterprise Edition?

Data Guard is included with Oracle Database Enterprise Edition.

What is RAC configuration?

Oracle Real Application Cluster (RAC) is a “share-everything” database architecture that can provide high availability and load balancing. A typical configuration for an Oracle RAC contains two or more Oracle RAC nodes that are clustered together and share the same storage.

What is difference between dataguard and RAC in Oracle?

RAC provides for high availability (and scalability) “in a room”. Data Guard however provides for continuity of operations – if the room in which your RAC cluster resides “goes away” (fire, flood, explosion, whatever) data guard is “somewhere else, ready to take over”.

What is Oracle RAC used for?

Oracle Real Application Clusters (RAC) allow customers to run a single Oracle Database across multiple servers in order to maximize availability and enable horizontal scalability, while accessing shared storage.

How do I manually remove Data Guard 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.

How many nodes we can configure in RAC?

Oracle RAC 11g supports up to 100 nodes.

Why do we need Oracle RAC?

The main aim of Oracle RAC is to implement a clustered database to provide performance, scalability and resilience & high availability of data at instance level.

How to configure DataGuard?

Check whether the database is in Archive Log Mode or not.

Enable force logging using below command: SQL> alter database force logging;

Check following parameter.

Check below parameters.

Does Oracle Grid rely on RAC?

RAC Database and clustering technology helped to set up and manage the overall Oracle Grid strategy. Still today, database processing and capability can be easily and dynamically added with the RAC technology. Thus, RAC is an integral part of Grid computing, but it is not the sum total of it.

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 Oracle Data Guard broker?

The Oracle Data Guard Broker is a feature of the Oracle database that consists of two client interfaces (OEM and DGMGRL) and the Oracle Data Guard Monitor (DMON) process. The Oracle Data Guard OEM and DGMGRL interfaces allow you to monitor and manipulate the configuration.