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Migrate Db2 z/OS to Amazon Aurora PostgreSQL using AWS DMS and gateway server

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This article demonstrates how to migrate IBM Db2 z/OS databases to Amazon Aurora PostgreSQL using AWS DMS with an EC2-based Db2 gateway server for secure data replication and periodic refresh.

  • Deploy EC2 instance with IBM Db2 Connect Server as gateway between mainframe and AWS
  • Configure AWS DMS replication instance with source (Db2 z/OS) and target (Aurora PostgreSQL) endpoints
  • Create DMS migration task for full-load and periodic full-load refresh operations
  • Validate data consistency by comparing row counts between source and target databases
  • Automate scheduled refreshes using AWS Lambda and Amazon EventBridge
  • Addresses architectural differences and licensing requirements for Db2 on z/OS migrations

This solution enables organizations to modernize Db2 z/OS workloads by migrating to cloud-based Aurora PostgreSQL while reducing licensing costs and improving scalability.

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