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How to migrate from Oracle to Amazon Aurora PostgreSQL using AWS CloudFormation (Part 1)

Database Blog

This article provides a step-by-step guide for migrating Oracle databases to Amazon Aurora PostgreSQL using AWS DMS and CloudFormation.

  • Use AWS DMS Schema Conversion to convert Oracle schemas to PostgreSQL-compatible format
  • CloudFormation template deploys Oracle RDS, Aurora PostgreSQL cluster, and DMS replication instance
  • Schema conversion assesses objects, identifies manual intervention needs, and exports results
  • AWS DMS migrates data using bulk load with validation and CloudWatch logging enabled
  • Table mappings handle case sensitivity differences between Oracle and PostgreSQL
  • Limited LOB mode optimizes performance for large object data migration
  • Deployment takes 20-30 minutes; full walkthrough completes in under one hour

This two-part migration approach systematically modernizes database infrastructure while maintaining data integrity and application functionality.

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