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

Prerequisites

• The types of source and destination databases of the data synchronization task are both MySQL.
• The synchronization topology of the data synchronization task is one-way synchronization.
• The status of the data synchronization task is Synchronizing.

Note

• 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.
• The upgrade operation causes data synchronization latency of about 5 seconds. We recommend that you perform this operation during off-peak hours.

Billing

• Subscription instance
  Total fee for upgrading the synchronization topology = (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 the 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 fee of the instance after upgrade equals the fee offered by monthly subscription.
  • If the number of remaining days is greater than or equal to 300 days, the fee of the instance after upgrade equals the fee offered by annual subscription.
• Pay-as-you-go instance

  After you upgrade the synchronization topology of a pay-as-you-go instance, you are still billed on an hourly basis. The fees are calculated based on the instance specification.

For more information about the pricing of DTS, see Pricing.

Procedure

1. Log on to the DTS console.
2. In the left-side navigation pane, click Data Synchronization.
3. Find the target instance and click Upgrade in the Actions column.
4. On the Upgrade page, set Synchronization Topology to Two-Way Synchronization.
   Note In this step, you can also select a new specification.
   
5. Select Data Transmission Service Agreement of Service and click Activate to complete the payment.