description AWS Database Migration Service Overview
AWS Database Migration Service enables organizations to move existing databases to Amazon Web Services. It supports both online and offline migrations, allowing for minimal disruption to applications during the transition process. DMS is particularly useful for businesses needing to migrate databases from various sources – including Oracle, SQL Server, MySQL, and MariaDB – to AWS Aurora or other supported database services. This service benefits IT professionals managing database deployments and seeking to leverage the scalability and cost-effectiveness of the cloud.
help AWS Database Migration Service FAQ
How does AWS DMS handle an Oracle to Aurora PostgreSQL migration?
AWS Database Migration Service can move the table data, but AWS Schema Conversion Tool is usually used to convert Oracle schema objects to PostgreSQL-compatible forms. That split matters because DMS migrates data while SCT deals with procedures, types, and SQL differences.
Can AWS DMS migrate a database with only a short outage?
Yes, DMS can run a full load and then use change data capture to keep the target close to the source. Teams often cut over after replication lag is low enough for an acceptable maintenance window.
What database engines does AWS DMS commonly support?
Common sources and targets include Oracle, Microsoft SQL Server, MySQL, MariaDB, PostgreSQL, Amazon Aurora, Amazon Redshift, and Amazon S3. The exact support depends on direction, engine version, and whether the task is homogeneous or heterogeneous.
When would DMS Serverless be preferable to a replication instance?
DMS Serverless is useful when you do not want to size and manage a replication instance manually. Traditional replication instances are still common when teams want fixed capacity, predictable networking, or more direct control over the migration environment.
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