Data Transmission Service: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 DTS instance to be migrated is 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 Dedicated Cluster page.

2. In the top navigation bar, select the region in which you want to create a DTS dedicated cluster from the drop-down list to the right of Workbench.

3. On the Cluster Task page, use one of the following methods to go to the Task Migration panel.

   • Find the dedicated cluster from or to which you want to migrate the DTS instance and choose > Task Migration in the Actions column.

   • Find the dedicated cluster from or to which you want to migrate the DTS instance and click its ID or click Details in the Actions column. In the upper part of the Cluster Management page, click Task Migration.

4. In the Task Migration panel, configure the parameters. The following table describes the 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.