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Data Guard

Oracle Active Data Guard ensures high availability, data protection, and disaster recovery for enterprise data. Survive disasters and data corruption while creating, maintaining, and managing one or more synchronized standby databases.

Active Data Guard versus storage remote mirroring

Fully integrated into the Oracle Database, Data Guard and Active Data Guard’s architectural advantages provide superior data protection and availability for the Oracle Database compared to the increased risks of storage replication techniques.

Read the technical brief (PDF)

Data Guard and Active Data Guard MAA best practices

Implement Oracle Data Guard best practices to achieve minimal downtime and zero data loss for unplanned outages.

Explore Best Practices

Autonomous Data Guard: Disaster recovery protection with a couple clicks in the cloud

Autonomous Data Guard provides a fully managed high-availability and disaster- recovery configuration across availability domains (ADs) with the simple click of a button or REST API call to enable it.

Discover Autonomous Data Guard capabilities

Active Data Guard features

Disaster recovery key capabilities

Disaster recovery to multiple standby databases

Oracle Data Guard’s automation manages one or more synchronized copies of a live database—providing zero data loss in the case of an unexpected outage of the primary database.

Learn how to configure and deploy Data Guard

In-memory database replication

In-memory redo replication ensures isolation from underlying corruption such as disk corruption and includes automatic comprehensive validation of replicated data blocks.

Explore Oracle Data Guard in-memory redo replication

Flexible protection modes

Data Guard provides three different protection modes that allow data replication flexibility to balance data loss protection and performance.

Learn about different Oracle Data Guard protection modes

Offload more than read-only workloads to your standby database

Oracle DML redirection lets applications manipulate data from the standby database, freeing important resources on the primary database. It increases the standby database usage and, ultimately, the return on investment.

Learn why DML redirection increases return on investment and database efficiency

Data protection

Fast-start failover (FSFO)

Fast-start failover allows the Oracle Data Guard broker to automatically failover to a standby database without the need for human intervention.

The importance of Fast-Start Failover in an Oracle Data Guard configuration (6:47)

Automatic Block Repair

Provides automatic and user-transparent recovery of a corrupted database from the standby database.

Far Sync

Achieve zero data loss across any distance in the event of site failure—with no network latency.

Advanced data protection features

Application Continuity

Masks outages from end-users and applications by recovering in-flight database transactions following recoverable outages.

Rolling database upgrades

Reduces downtime for database version upgrades without the complexity of adding extra software to the system.

Learn how to take advantage of DBMS_ROLLING

Global Data Services (GDS)

GDS provides load balancing for connection requests ,distributing service management across multiple replicated databases and enables connections depending on read or read/write workload for Active Data Guard.

Explore global data services (GDS)

Oracle Globally Distributed Database

Oracle Globally Distributed Database disperses segments of a data set across many databases (shards) onto different computers—on-premises or in the cloud. It enables globally distributed, linearly scalable, multimodel databases.

Explore Oracle Globally Distributed Database

Data Guard customer successes

Oracle Data Guard offers data protection and availability across data centers or the cloud.

Epsilon improves availability and security with Oracle

Watch the video (1:34)

Data Guard use cases

Complete data protection and disaster recovery

Automates the management of synchronized copies of a live database and is included with Oracle Database Enterprise Edition.

Learn more about Oracle Active Data Guard disaster recovery
Automatic role transitions to maintain business continuity

Failover automation ensures a seamless transition from the primary database to a synchronized standby database in cases of failure, while ensuring database availability by replaying uncommitted in-flight transactions.

Configure one or more active standby databases
Minimize downtime for upgrades

Full upgrade automation with minimal downtime via rolling database version upgrades without the complexity of adding extra software to the system.

Plan rolling upgrades to minimize downtime
Zero data loss at any distance

Zero data loss is achieved when utilizing Far Sync even over configurations where the primary and standby databases are distributed over long geographical distances without risking application performance.

Using Far Sync in Active Data Guard