Applicable Scenarios

This article is applicable for using the Baidu AI Cloud Data Transmission Service (DTS) to migrate the data from the Cloud Database SCS for Redis instance or self-built Redis database instance to the cloud database SCS for Redis instances or self-built Redis database.

Migration Prerequisites

The Redis database instance, such as SCS for Redis instance or self-built Redis storage instance, has been created as the migration source. Also, the instance is running normally.

The Redis database instance, such as SCS for Redis instance or self-built Redis storage instance, has been created as the migration destination. And the instances are running normally.

Migration Requirements

Instances requirements:
The migration between the same instances is not supported. The source and destination Redis instances should be different.

Version requirements:
The source Redis instance supports 2.8x, 3 series, 4 series, 5 series, and 6 series versions.
The source supports the SCS for Redis community standard instances, or self-built Redis storage instance, such as self-built Redis storage master-slave architecture instance for the public network/BBC/BCC/DCC.
The destination supports the SCS for Redis community standard instances or enterprise cluster instances. The self-built Redis storage supports self-built Redis storage master-slave/cluster architecture instances for the public network/BBC/BCC/DCC. Temporarily not supported the Cloud Database SCS for Redis Community Cluster Instances.
The source Redis database instance version and the destination Redis database instance version should follow the principle that the high version is compatible with the low version. The destination Redis database instance version cannot be lower than the source Redis database instance version.

Granularity requirements
The current Redis-Redis migration supports the migration at the instance-grained level.

Migration restrictions

Consistency limit:
When DTS is performing a Redis data migration task, the destination data may be different if the task fails due to an error during the incremental synchronization, and then the migration task is restarted.

Operating Steps

1. Create a migration task

On the management console of DTS, click the【Data transmission task】tab on the left and click the [Create Data Transmission Instance] button.

Suppose your source is a cloud database SCS for Redis instance, select Baidu AI Cloud Database at the source. If it is self-built Redis storage on the public network/BBC/BCC/DCC, select the self-built data storage at the source.

If your destination is a cloud database SCS for Redis instance, selectBaidu AI Cloud Database as the destination. If it is self-built Redis storage on the public network/BBC/BCC/DCC, select self-built data storage at the destination.

You can select the cross-region or same region as the case may be.

Then, click “Next” to complete the purchase configuration. The page will jump to the task list page of the management console. An unconfigured DTS task will be added at the top of the list page, which is the migration task you created. Click “Configure Task” to configure the task. If no new task is found on the list page after the page jumps, it is suggested to wait for a period to refresh the page.

2. Configure a task

First, enter the task connection configuration page. The following example takes the self-built data storage as the source and the destination as Baidu AI Cloud Database for configuration.

Configure the source as a Redis self-built data storage instance. Select the self-built access type corresponding to the source, such as self-built Redis storage in the public network.

Select the public network as the access type and Redis as the data type.

Enter the corresponding IP/port. If a password is set, enter the correct password. The source is the self-built Redis storage instance configuration in the public network, as shown in the figure below. Click the [Test connectivity] button to test the connectivity.

For example, configure the Baidu AI Cloud database as the destination. The destination data type will be automatically matched according to the source data type. In the destination region, select the SCS for Redis instance you want to migrate. If a password is configured, enter the correct password.

Click the [Authorize Whitelist and Enter Next Step] button and select the incremental migration as the migration type. The Redis-to-Redis migration supports instance-level incremental migration, including full synchronization and incremental synchronization.

After you select the migration type, you can click the [Save and pre-check] button to save the configuration and perform the pre-check, or click the [Save] button to save the configuration.

3. Start migration

After you save the configuration, you can start the pre-check on the task list page. If you click the [Save and pre-check] button when you save the configuration task, you do not need to perform the pre-check again.

If the pre-check fails, you can check the relevant configuration according to the error prompt. If the configuration is incorrect, you can reconfigure it.

After the pre-check is successful, you can start the task.