Get started with change tracking-Data Transmission Service(DTS)-阿里云帮助中心

The change tracking feature of Data Transmission Service (DTS) retrieves real-time incremental data from a database for scenarios such as cache updates, asynchronous decoupling, real-time synchronization between disparate data sources, and complex ETL processes. Use this guide to create, monitor, and manage change tracking channels and consume tracked data.

Background information

Subscription plan overview

Describes the supported databases and data types for change tracking.
Features

For more information, see Change tracking.

Change tracking process

To use DTS for change tracking, complete the following steps.

Data subscription flowchart

Workflow	Description
Preparations	Prepare the source database to meet the environment requirements before you configure change tracking.
Configure a tracking task	Configure the change tracking task in the DTS console.
Managing subscription channels	Add a consumer group After you configure the change tracking channel, add a consumer group for the client to consume data. You can create multiple consumer groups to consume data from the same source repeatedly, which reduces costs and improves consumption speed. Optional: Manage consumer groups Manage consumer groups for a change tracking channel, such as changing passwords or deleting groups. Optional: Modify tracked objects You can modify the tracked objects while the tracking task is running.
Consuming subscription data	Select a consumption method based on your client and database type: Consume tracked data using an SDK Consume tracked data from a PolarDB-X 1.0 instance using an SDK Consume tracked data using flink-dts-connector Consume tracked data using a Kafka client
Stop the change tracking task	To stop a change tracking task, release the DTS instance. Pay-as-you-go: For more information, see Release a pay-as-you-go instance. Subscription: For more information, see Unsubscribe from a subscription instance. Note You can also stop the change tracking task by resetting the change tracking channel. For more information, see Reset a DTS instance.