What is Data Guard in Oracle 11g?

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.

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 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 Oracle Active Data Guard?

Oracle Active Data Guard is the most comprehensive solution available to eliminate single points of failure for mission critical Oracle Databases. It prevents data loss and downtime in the simplest and most economical manner by maintaining a synchronized physical replica of a production database at a remote location.

How enable Data Guard in Oracle?

1. Use Oracle Data Guard Broker with Oracle Data Guard.
2. Use Recovery Manager to Create Standby Databases.
3. Use Flashback Database for Reinstatement After Failover.
4. Use FORCE LOGGING Mode.
5. Use a Simple, Robust Archiving Strategy and Configuration.
6. Use Standby Redo Logs and Configure Size Appropriately.

What is FAL_SERVER and Fal_client in Data Guard?

FAL_SERVER used to fetch archive log server for a standby database. Value in FAL_SERVER parameter act as Oracle Net Service name which point to standby database. FAL_CLIENT Parameter. FAL_CLIENT specifies the FAL(fetch archive log) client name that is used by the FAL service.

What are the types of Data Guard?

There are 3 types of standby setup:

• Physical standby.
• Logical standby.
• Snapshot standby.

What is the difference between Data Guard and Golden Gate?

Data Guard is an Oracle specific technology while GoldenGate support heterogeneous database systems including all the major RDBMS as DB2,Sybase, MySQL . Data Guard supports active-passive replication. One of the database is the primary database and the other one is in an inactive Data Guard mode.

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. However, if the database is started in SQL*Plus using the STARTUP MOUNT command and then managed recovery is invoked, Active Data Guard will not be enabled.

What is Active Data Guard used for?

Active Data Guard enables read-only access to a physical standby database while Redo Apply is active. Queries and reports can be offloaded from the production system to a synchronized physical standby database – all queries at the standby database return up-to-date results.

How do I enable Data Guard?

How to Create and Enable an Oracle Data Guard Broker…

1. Create an Oracle Data Guard Broker configuration for the primary database.
2. Add the standby database to the Oracle Data Guard Broker configuration.
3. Configure the apply instance for the standby database.

What is Fal_client and FAL_SERVER?

What is LNS and RFS in Data Guard?

LNS process of primary database captures redo from redo log buffer. Send it to RFS process of standby database through oracle net. RFS process then writes that redo information to standby redo log files.

What is FAL in dataguard?

FAL means fetch archive log. Its clearly indicate with name that fetch the archive log. FAL_SERVER used to fetch archive log server for a standby database. Value in FAL_SERVER parameter act as Oracle Net Service name which point to standby database.

What are the data guard types in Oracle?

An Oracle Data Guard configuration can include any combination of these types of standby databases.

• 1 Physical Standby Databases. A physical standby database is an exact, block-for-block copy of a primary database.
• 2 Logical Standby Databases.
• 3 Snapshot Standby Databases.

What is Oracle RAC and dataguard?

rac is a cluster of machines (nodes) whereby the oracle instance is being switched around if the node which houses the instance has some problems? dataguard is a configuration of 2 machines. one is the production and the other is the standby, exact replica of the production.

What does Data Guard do?

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. Data Guard maintains these standby databases as transactionally consistent copies of the production database.

Is Oracle Golden Gate free?

Oracle GoldenGate Product Management is happy to announce free GoldenGate software licenses and support on OCI Marketplace.

How can I check my data Guard status?

Displaying an Oracle Data Guard Runtime Status Overview….How to Check the Overall Runtime Status of Replication

1. Log in to a node of a cluster where the protection group is defined.
2. Check the runtime status of replication.
3. Check the runtime status of data replication for each Oracle Data Guard protection group.

How check Data Guard in Oracle?

SQL> alter database set standby database to maximize {AVAILABILITY | PERFORMANCE | PROTECTION}; SQL> alter database open; 4. To confirm the change in protection mode, query v$database on the primary.

What is the difference between Oracle 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.

What is the Active Data Guard option (Oracle Database 11g)?

• The Active Data Guard option(Oracle Database 11g) enables a physical standby database to be used for read-only applications while simultaneously receiving updates from the primary database. Queries executed on an active standby database return up- to-date results.

Is there a manual 11gR2 Data Guard setup available?

This article is a repeat of the manual 11gR2 Data Guard setup described here, but here the Data Guard setup and administration is performed using the Data Guard Broker. Related articles. Data Guard Quick Links : 11gR2 , 12cR1 , 12cR2 , 18c , 19c , 21c , All Articles

What is a standby Oracle Database 11g?

A standby database server with a software-only installation of Oracle Database 11g Release 2. Setup and installation is the same as the previous server, with the exception of the software-only installation.