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disaster-recovery

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2019-12-17

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Disaster Recovery for Oracle Database

Zero Data Loss Recovery Appliance,

Active Data Guard and Oracle GoldenGate

ORACLE WHITE PAPER | APRIL 2015

1 | DISASTER RECOV ERY FOR ORACLE DATABASE – RECOVERY APPLIAN CE , ACTIVE DATA GUARD AND ORACLE GOLDENGATE

Overview

Oracle Database provides three different approaches to disaster recovery that provide the highest

level of data protection and availability compared to any other approach for protecting Oracle data.

Oracle Zero Data Loss Recovery Appliance is an engineered system designed to eliminate data loss

and dramatically reduce data protection overhead for all Oracle databases in the enterprise. Integrated

with Recovery Manager (RMAN), it enables a centralized, incremental forever backup strategy for

hundreds to thousands of databases, using cloud-scale, fully fault-tolerant hardware and storage.

Replication capabilities integrated with the Recovery Appliance make it ideally suited for providing

disaster recovery for Oracle databases where a restore from backup is sufficient to address recovery

time objectives.

Oracle Active Data Guard is the replication solution optimized for data protection and disaster recovery

for the Oracle Database. Active Data Guard prevents data loss and downtime by maintaining a

synchronized physical replica of the production database. If the production database becomes

unavailable for any reason, client connections can quickly, and in some configurations transparently,

fail over to the replica to immediately restore service. Active Data Guard als o eliminates idle

redundancy by allowing read-only workloads to be offloaded to a copy of the production database.

Active Data Guard is ideally suited for providing disaster recovery for databases with recovery time

objectives that cannot tolerate the downtime that accompanies a restore from backup.

Oracle GoldenGate

This paper provides Oracle Maximum Availability Architecture

is Oracle’s ful l-featured replication solution designed to address a wide range of

requirements. GoldenGate maintains a synchronized logical copy of a production database that is

open read-write at all times. A GoldenGate replica, for example, can offload reporting applications that

require read-write database access or can be used to load-balance read-write workloads using

multimaster replication. Increased flexibility, however, is accompanied by several trade-offs for data

protection and operational simplicity compared to Active Data Guard. GoldenGate is used for disaster

recovery by customers who accept these trade-offs in return for its additional flexibility.

1 http://www.oracle.com/technetwork/database/features/availability/maa-096107.html

best practices for the use of the

Recovery Appliance, Active Data Guard, and Oracle GoldenGate for disaster recovery. It assumes the

reader already has a basic technical knowledge of each solution.

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