How to Create a Database Migration Service (DMS) Job Between 2 Cloud SQL Instances within GCP?

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Are you looking to efficiently migrate data between two Cloud SQL instances within Google Cloud Platform (GCP)? Database migration services (DMS) provide a seamless solution for transferring your data while ensuring minimal downtime. In this article, we will guide you through the process of creating a DMS job between two Cloud SQL instances within GCP. Whether you’re a beginner or an experienced user, by the end of this article, you’ll have a clear understanding of how to successfully execute this task.

Understanding Cloud SQL Instances and DMS

Before we delve into the steps of creating a DMS job, let’s first familiarize ourselves with Cloud SQL instances and the significance of utilizing a database migration service. Cloud SQL instances are fully managed relational database services offered by Google Cloud. They provide a reliable and scalable solution for hosting your databases.

A database migration service (DMS) is a tool provided by GCP that simplifies the process of transferring data between databases. It ensures data consistency, minimizes downtime, and allows for a seamless transition from one Cloud SQL instance to another. By leveraging DMS, you can handle complex data migration tasks with ease.

Preparing for the Database Migration

Before initiating the database migration process, it is essential to prepare adequately. Here are some crucial steps to consider:

1. Evaluate Compatibility

Ensure that the source and target Cloud SQL instances are compatible. This includes checking the compatibility of database engines, versions, and configurations. It’s crucial to verify that the target instance can accommodate the data being migrated.

2. Access and Permissions

Grant the necessary access and permissions to perform the database migration. Ensure that the appropriate roles and privileges are assigned to the service account responsible for executing the migration. This step guarantees a smooth and secure transfer of data.

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3. Backup the Source Database

Before initiating the migration, it is best practice to create a backup of the source database. This ensures that you have a fallback option in case any unforeseen issues arise during the migration process. It’s always better to be safe than sorry!

Setting Up the Database Migration Service (DMS) Job

Now that we have completed the initial preparations, let’s dive into the steps required to set up a DMS job between two Cloud SQL instances within GCP.

Step 1: Access the GCP Console

To begin, access the Google Cloud Platform Console. If you don’t already have an account, you can create one for free. Once logged in, navigate to the Cloud SQL section.

Step 2: Create a New DMS Job

Within the Cloud SQL section, locate the DMS tab and click on “Create migration job.” This will initiate the setup process for your DMS job.

Step 3: Configure the Source and Target Instances

Provide the necessary details for both the source and target Cloud SQL instances. This includes specifying the instance names, project IDs, and database details. Double-check the information to ensure accuracy.

Step 4: Choose the Migration Type

Select the appropriate migration type based on your requirements. GCP offers different migration options, including a one-time migration or continuous replication. Choose the option that best suits your needs.

Step 5: Configure the Migration Settings

Configure the settings for the migration, such as specifying the migration frequency, network settings, and replication options. Pay close attention to these settings to ensure the migration process aligns with your desired outcome.

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Step 6: Review and Start the Migration

Before finalizing the setup, review all the provided details to ensure accuracy. Once satisfied, initiate the migration process, and monitor the progress within the GCP Console. Congratulations, you have successfully set up a DMS job between two Cloud SQL instances!

Frequently Asked Questions (FAQ)

Q1: Can I migrate data between different database engines using DMS?

Yes, you can migrate data between different database engines using the database migration service. GCP supports migrations between various popular database engines, such as MySQL, PostgreSQL, and SQL Server.

Q2: Is there any downtime during the database migration process?

With DMS, you can minimize downtime during the migration process. By utilizing techniques like continuous replication and leveraging GCP’s robust infrastructure, you can achieve near-zero downtime.

Q3: Can I schedule recurring database migrations using DMS?

Absolutely! GCP’s DMS allows you to schedule recurring database migrations according to your specific requirements. This feature is particularly useful for scenarios where you need to keep your target database updated with the latest data from the source.

Q4: What happens if the migration fails or encounters errors?

In the event of a migration failure or encountering errors, DMS provides detailed logs and error reports. These resources will help you troubleshoot and identify the cause of the issue. Additionally, having a backup of the source database will enable you to roll back and retry the migration if necessary.


Migrating data between two Cloud SQL instances within GCP is made simple and efficient with the database migration service (DMS). By following the steps outlined in this article, you can successfully create a DMS job and seamlessly transfer your data. Remember to evaluate compatibility, grant access and permissions, and backup your source database before initiating the migration. With DMS, you can confidently migrate your data while ensuring minimal downtime and maintaining data integrity. Start leveraging DMS today and experience the benefits of streamlined database migration within Google Cloud Platform.

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