DMS migrates databases to AWS with minimal downtime, and it can keep the source and target in sync during the move. It also handles ongoing replication between databases.
Homogeneous vs heterogeneous
DMS handles same-engine migrations (Oracle to Oracle) directly. For different engines (Oracle to Aurora PostgreSQL), pair it with the Schema Conversion Tool (SCT) to convert the schema first, then DMS moves the data. Its continuous replication mode keeps the target current so cutover downtime is tiny.
Test yourself
A company must migrate an on-premises Oracle database to AWS with almost no downtime, keeping the source running until cutover. Which service?
- AWS DataSync
- AWS Database Migration Service (DMS)
- Amazon S3 Transfer Acceleration
- AWS Snowball
👉 Click to reveal the answer & explanation
Correct answer: B. DMS migrates databases with continuous replication so the source stays live until a low-downtime cutover. DataSync (A) moves files, not live databases; Transfer Acceleration (C) speeds S3 uploads; Snowball (D) is offline bulk transfer.
Related topics
AWS DataSync · Amazon Aurora · Amazon RDS
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