GoldenGate & Data Guard Integration with Commands in Oracle 19c RAC:
1️⃣ GoldenGate Installation on RAC Nodes
Install Oracle GoldenGate on all RAC nodes where replication is needed. Ensure you have the correct Oracle GoldenGate version compatible with Oracle 19c.
Command to Install GoldenGate:
./runInstaller -jreLoc /path_to_java_home -DORACLE_HOME=/path_to_oracle_home -DORACLE_BASE=/path_to_oracle_base
2️⃣ Configuring Oracle GoldenGate for Oracle 19c RAC
GoldenGate needs to be configured on each RAC node to enable replication. The setup typically involves creating Extract, Replicat, and Data Pump processes for data capture and transfer.
Extract Process Configuration Command:
ADD EXTRACT ext_name, TRANLOG, BEGIN NOW
ADD EXTTRAIL /path_to_exttrail, EXTRACT ext_name
Replicat Process Configuration Command:
ADD REPLICAT rep_name, TARGETDB db_name
Data Pump Configuration (to send data between systems):
ADD DATA PUMP pump_name, EXTTRAIL /path_to_exttrail, EXTRACT ext_name
3️⃣ Oracle Data Guard Setup for Oracle 19c RAC
Data Guard provides disaster recovery by maintaining standby databases. To integrate Data Guard with Oracle 19c RAC, configure Primary and Standby databases.
Enable Data Guard Broker:
ALTER SYSTEM SET dg_broker_start=TRUE SCOPE=BOTH;
Create a Physical Standby Database:
On Primary Database: Create a backup using RMAN.
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RMAN> BACKUP DATABASE FORMAT ‘/path_to_backup/backup_%U’;
On Standby Database: Restore the backup from the primary.
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RMAN> RESTORE DATABASE FROM ‘/path_to_backup’;
On Primary Database: Enable Redo Transport.
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ALTER SYSTEM SET log_archive_config=’DG_CONFIG=(primary_db,standby_db)’ SCOPE=BOTH;
ALTER SYSTEM SET log_archive_dest_1=’SERVICE=standby_db ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=primary_db’ SCOPE=BOTH;
Switch Log Mode to Archive:
ALTER DATABASE ARCHIVELOG;
Data Guard Standby Configuration:
dgmgrl> ENABLE CONFIGURATION;
dgmgrl> SHOW CONFIGURATION;
4️⃣ GoldenGate & Data Guard Integration
GoldenGate can be integrated with Data Guard to ensure real-time data replication across RAC instances and to the standby database.
Command to enable GoldenGate replication with Data Guard:
On the Primary RAC Node:
ADD EXTRACT ext_name, TRANLOG, BEGIN NOW
Enable Redo Capture for GoldenGate:
ALTER SYSTEM SET enable_goldengate_replication=true;
Enable GoldenGate on Standby Database:
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ALTER SYSTEM SET enable_goldengate_replication=true;
Set up GoldenGate Replicat Process on Standby Database:
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ADD REPLICAT rep_name, TARGETDB standby_db
5️⃣ Failover & Switchover
With Data Guard, you can test failover or switchover to ensure seamless recovery in case of a disaster or planned maintenance.
Switchover Command:
dgmgrl> SWITCHOVER TO standby_db;
Failover Command (if the primary fails unexpectedly):
dgmgrl> FAILOVER TO standby_db;
💡 Key Takeaways:
GoldenGate enables real-time data replication between Oracle 19c RAC and other databases, ensuring seamless synchronization across systems.
Data Guard provides disaster recovery by maintaining a physical standby database, which automatically takes over during failover events.
By combining both, you can achieve high availability, data protection, and minimal downtime in your Oracle 19c RAC environment.