You can upgrade the synchronization topology of a data synchronization task from one-way to two-way in the Data Transmission Service (DTS) console.

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

  • If the billing method is subscription,
    Task configuration fee = (Daily fee of the task after upgrade - Daily fee of the task before upgrade) × (Subscription expiration date - Upgrade date)
    Note The daily fee of a task 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 fee of the task 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 task after upgrade equals the fee offered by annual subscription.
  • If the billing method is pay-as-you-go,

    The task configuration fee is calculated based on the new instance class of the task. The billing rules remain unchanged. A bill is generated on an hourly basis.

Note For more information, see Pricing.

Limits

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.

  1. Log on to the DTS console.
  2. In the left-side navigation pane, click Data Synchronization.
  3. Find the data synchronization instance and choose More > Change to Two-way Synchronization.
  4. In the message that appears, click OK.