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.
• 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.

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.
3. On the Cluster Task page, use one of the following methods to go to the Task Migration panel.
   • Find the DTS dedicated cluster that you want to use. Click the icon in the Actions column and select Task Migration.
   • Find the DTS dedicated cluster that you want to use. 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 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 in another cloud, you must add the CIDR blocks of DTS servers to the whitelist of the database. For more information, see Add the CIDR blocks of DTS servers to the security settings of on-premises databases.
   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 mapping between specifications of DTS instances in a dedicated cluster and those in a public cluster.

   DTS dedicated cluster	DTS public cluster
   1 DTS unit (DU)	micro
   2 DUs	small
   3 DUs	medium
   4 DUs	large
   5 DUs	xlarge
   6 DUs	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.