From Mainframe to AWS Cloud: A comprehensive mapping guide – Part 2 (Databases)

This article provides a comprehensive guide to migrating mainframe databases to AWS, focusing on three core database types: Db2 for z/OS, Information Management System (IMS) DB, and Virtual Storage Access Method (VSAM).

• For Db2 for z/OS, AWS offers Amazon RDS for Db2, providing a fully managed database service with features like encryption, on-demand backups, and compatibility with existing Db2 environments
• IMS DB migration options include converting to relational databases like Amazon RDS, using Amazon DynamoDB for hierarchical data, or leveraging caching solutions like Amazon MemoryDB
• VSAM migration strategies involve using Amazon S3, Amazon EFS, or Amazon RDS depending on data access patterns and complexity
• AWS provides multiple migration tools like AWS Database Migration Service (DMS) and Schema Conversion Tool (SCT) to facilitate database transitions
• Partner solutions from companies like Precisely can help with complex data migration and replication scenarios

The article emphasizes that while legacy databases are reliable, modernizing to cloud infrastructure can provide significant benefits in scalability, flexibility, and cost-effectiveness.