AWS Certified Cloud Practitioner

Explanation

AWS Database Migration Service (AWS DMS) is specifically designed for migrating databases to AWS with minimal downtime. Here's why:

Key Features of AWS DMS:

• Continuous Data Replication: DMS can continuously replicate data from the source database to the target database during the migration process
• Minimal Downtime: Supports near-zero downtime migrations by keeping the source and target databases in sync until the cutover
• Database Support: Supports migration between homogeneous databases (e.g., Oracle to Oracle) and heterogeneous databases (e.g., Oracle to Amazon Aurora)
• Security: Provides secure data transfer with encryption in transit and at rest
• Automated Schema Conversion: Can automatically convert database schemas when migrating between different database engines

Why Other Options Are Not Suitable:

• AWS Snow Family: Used for offline data transfer of large datasets, not for live database migrations with minimal downtime
• AWS DataSync: Designed for moving file system data between on-premises storage and AWS, not for database migrations
• AWS Mainframe Modernization: Focuses on modernizing mainframe applications, not specifically for database rehosting with minimal downtime

AWS DMS is the ideal choice for securely rehosting databases to AWS while maintaining business continuity through minimal downtime migrations.