This article provides a comprehensive guide to implementing Oracle GoldenGate bidirectional replication between Amazon RDS for Oracle databases across AWS regions.

• Active-active replication enables multiple database instances to support independent read/write operations with synchronized changes
• Architecture uses OGG on EC2 instances, VPC peering, and Route 53 for global application deployment
• Prerequisites include two EC2 instances with OGG 19c+, VPC peering, Oracle client, S3 bucket with cross-region replication, and IAM roles
• Initial data load uses Oracle Data Pump (expdp/impdp) with S3 integration for transferring data between regions
• Extract processes capture incremental changes; Pump processes decouple extraction from network transmission
• Replicat processes apply changes on target databases with conflict detection and resolution using USEMAX strategy
• Conflict resolution uses COMPARECOLS to detect conflicts and RESOLVECONFLICT to apply resolution rules
• Testing validates one-way and bidirectional replication, plus conflict detection with automatic resolution
• CloudWatch monitoring tracks OGG error logs for operational visibility

This solution enables mission-critical applications to achieve high availability across regions with data redundancy and zero-downtime disaster recovery capabilities.