Data Transmission Service:Upgrade synchronization topology from one-way to two-way

Prerequisites

• The source and destination databases of the data synchronization task are both MySQL databases.

• The synchronization topology of the data synchronization task is one-way synchronization.

• The data synchronization task is in the Running state.

Billing

• Subscription method

  Total fee for upgrading a subscription instance = (Daily fee of the instance after upgrade - Daily fee of the instance before upgrade) × (Subscription expiration date - Upgrade date)

  Note

  The daily fee of an instance after upgrade depends on the number of remaining days from the upgrade date to the expiration date.

  • If the number of remaining days is less than 300 days, the daily fee of the instance after upgrade equals the monthly subscription price divided by the number of days in the month.

  • If the number of remaining days is greater than or equal to 300 days, the daily fee of the instance after upgrade equals the yearly subscription price divided by the number of days in the year.

• Pay-as-you-go method

  After you upgrade a pay-as-you-go instance, you are charged per hour based on the new instance class.

Usage notes

• You can only upgrade the synchronization topology from one-way to two-way. You cannot downgrade the synchronization topology from two-way to one-way.

• You cannot upgrade the synchronization topology from one-way to two-way for a data synchronization task between PolarDB-X 2.0 instances.

Procedure

1. Go to the Data Synchronization Tasks page.

   1. Log on to the DMS console.

   2. In the top navigation bar, click DTS.

   3. In the left-side navigation pane, choose DTS (DTS) > Data Synchronization.

   Note

   • The actual operation may vary depending on the mode and layout of DMS. For more information, see Simple mode and Customize the layout and style of the DMS console.

   • You can also go to the Data Synchronization Tasks page of the new DTS console.

2. From the drop-down list to the right of Data Synchronization Tasks, select the region in which you want to create the data synchronization task.

   Note

   If you use the new DTS console, select the region in which you want to create the data synchronization task in the upper-left corner of the page.

3. Find the data synchronization instance that you want to manage, click the icon, and then click Change to Two-way.

4. In the message that appears, click OK.