Rolling Back the Migration - Database Migration Guide
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Rolling Back the Migration

If there are major issues with the migration that cannot be resolved in a timely manner, you can roll back the migration. These steps assume that you have already prepared for the rollback as described in Step 8: Cut Over to PostgreSQL.

  1. Stop all application services on the target PostgreSQL database.

  2. Let the Amazon DMS task replicate remaining changes back to the source Oracle database.

  3. Stop the PostgreSQL to Oracle Amazon DMS task.

  4. Start all applications back on the source Oracle database.