DMS CDC to S3 - Data Engineering on AWS

Introduction

AWS Database Migration Service (DMS) allows you to migrate databases to AWS quickly and securely. One of its features is Change Data Capture (CDC), which enables you to replicate changes made to your data in real-time. This lesson focuses on using DMS CDC to transfer data from a source database to Amazon S3, a cost-effective and scalable storage solution.

Key Concepts

Step-by-Step Process

1. Set Up AWS DMS

   Navigate to the AWS DMS console and create a replication instance.

2. Create Source and Target Endpoints

   Define the source database (e.g., MySQL) and the target (Amazon S3) endpoints in the DMS console.

3. Create a Migration Task

   Configure a migration task to perform CDC. Choose the replication type as "CDC only" to capture changes.

4. Start the Task

   Once the task is configured, start it to begin capturing changes from the source database and writing them to S3.

5. Monitor the Task

   Use the DMS console to monitor the task’s progress and check for any errors.

Best Practices

• Regularly monitor the replication instance for performance bottlenecks.
• Use IAM roles to securely manage access permissions for S3.
• Implement error handling and logging mechanisms to track replication issues.
• Test the migration process in a staging environment before going live.

FAQ

Flowchart

          graph TD;
              A[Start] --> B[Set up AWS DMS];
              B --> C[Create Source Endpoint];
              C --> D[Create Target Endpoint];
              D --> E[Configure Migration Task];
              E --> F[Start Task];
              F --> G[Monitor Task];
              G --> H[End];