Migrate a DTS instance between a dedicated cluster and a public cluster

Prerequisites

• A DTS dedicated cluster and the DTS instance to be migrated are created.

  Note

  If the DTS instance is a data synchronization or migration instance, the source and destination databases must reside in the same region.

• The instance must be in the Running state.

Usage notes

• Do not perform DDL operations on the source database during the migration of a DTS instance. Otherwise, the DTS instance fails to be migrated or the data is inconsistent after the migration.

• The DTS instance to be migrated, including the source and destination databases of the instance, must be in the region in which the DTS dedicated cluster resides.

• After you migrate a DTS instance from a public cluster to a dedicated cluster, you are no longer charged for the DTS instance. The billing method of a subscription DTS instance is changed to pay-as-you-go and no fee is charged for the DTS instance after the DTS instance is migrated from a public cluster to a dedicated cluster. The DTS instance is automatically refunded.

• If you migrate a DTS instance from a dedicated cluster to a public cluster, you are charged for the DTS instance. For more information, see Billing overview.

• Before you migrate a DTS instance from a public cluster to a dedicated cluster, you must estimate the number of DTS units (DUs) required for the dedicated cluster based on the instance class of the DTS instance in the public cluster. If the available DUs of the dedicated cluster are insufficient, the migration fails. For information about the mappings between DTS instance classes in dedicated and public clusters, see the table in step 5.

Procedure

1. Go to the DTSDTS Dedicated Clusters page.

2. To the right of Workbench, select the region where you want to create the dedicated cluster.

   Note

   If you are logged in to the Data Management (DMS) console, select the region for the dedicated cluster to the right of Cluster Task.

3. In the Cluster Task list, open the Task Migration panel in one of the following ways:

   • Find the target dedicated cluster and in the Operation column, click > Task Migration.

   • Click the name or ID of the target dedicated cluster, or click Detail in the Operation column. Then, in the upper-left corner of the Basic Information section, click Task Migration.

4. In the Task Migration panel, configure the following parameters.

   Section	Parameter	Description
   Supported Scenarios	N/A	Select Migrate a DTS instance from a dedicated cluster to a shared cluster or Migrate a DTS instance from a shared cluster to a dedicated cluster based on your business requirements. Important If the source or destination database of the DTS instance is an on-premises database or a database deployed on a third-party cloud platform, you must add the CIDR blocks of DTS servers to the IP address whitelist of the database. For more information, see Add the CIDR blocks of DTS servers.
   Select the DTS instance to be migrated	Type	The type of the DTS instance to be migrated. Valid values: Data Migration Change Tracking Data Synchronization
   	Select instance	The DTS instance to be migrated.

5. Click OK.

   The following table describes the mappings between DTS instance classes in dedicated and public clusters.

   DTS instance classes in dedicated clusters	DTS instance classes in public clusters
   1DU	micro
   2DU	small
   3DU	medium
   4DU	large
   5DU	xlarge
   6DU	2xlarge

   Note

   • If the number of DUs allocated to a DTS data migration instance exceeds 6, the DTS instance is converted to the 2xlarge type in a public cluster by default.

   • If the number of DUs allocated to a DTS data synchronization instance exceeds 4, the DTS instance is converted to the large type in a public cluster by default.