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Data synchronization

Last Updated: Dec 20, 2017

Data synchronization helps you replicate data between two databases in real time. It is applicable to scenarios such as off-site disaster recovery, cross-region data synchronization, and data synchronization between OLTP and OLAP.

Features

Key features of DTS synchronization include:

  • Real-time data synchronization between two RDS instances.

  • Data synchronization between a RDS instances in a classic network and a RDS instances in a VPC network.

  • Data synchronization between two RDS instances under different Alibaba Cloud accounts.

Synchronization task

To synchronize data between two instances, you must create a synchronization task in the DTS console.

Synchronization task displays different status on creation and progress.

Synchronization Status Description Operations Available
Not started Synchronization task is configured, but not started.
  • Modify configuration
  • Start
  • Delete
  • Configure monitor
Pre-checking Synchronization task is performing pre-check.
  • Delete
  • Configure monitor
Pre-check failed The pre-check fails.
  • Modify configuration
  • Start
  • Delete
  • Configure monitor
Initializing Synchronization task is migrating the existing data from the source instance to the target instance.
  • Delete
  • Configure monitor
Initialize Failed The synchronization task failed to migrate existing data.
  • Modify synchronization objects
  • Delete
  • Configure monitor
Synchronizing The synchronization task is replicating incremental data from the source instance to the target instance.
  • Modify synchronization object
  • Delete
  • Configure monitor
Failed Synchronization task fails to replicate incremental data.
  • Modify synchronization object
  • Delete
  • Configure monitor
Paused Synchronization task is suspended.
  • Start
  • Modify synchronization object
  • Delete
  • Configure monitor

Benefits

DTS synchronization offers the following features:

  • Synchronization object modification

    You can add or delete synchronization objects during replication.

  • Synchronization exception monitoring

    DTS monitors the performance of all tasks and detects problems, such as lag or abended processes. When a task fails, DTS immediately sends an alarm message to the task owner.

  • Synchronization performance visualization

    DTS console displays crucial information, such as replication lag and task status in real time, for better insight into your key business applications.