Help Center/ Distributed Database Middleware/ User Guide/ Instance Management/ Scaling In a DDM Instance
Updated on 2024-07-30 GMT+08:00
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Scaling In a DDM Instance

This section describes how to scale in a DDM instance as service data volume decreases.

Precautions

  • Scaling in a DDM instance will not interrupt services.
  • Scale in your DDM instance during off-peak hours. For pay-per-use instances, nodes are removed after the scale-in request is submitted.
  • Make sure that the associated data nodes are normal and not undergoing other operations.
  • At least one node should be left for a DDM instance.
  • After a read-only group is created, the entry for removing nodes will be moved to the operation column of the group.

Procedure

  1. Log in to the DDM console.
  2. On the Instances page, locate the instance that you want to remove nodes from and click its name.
  3. Click Scale In. If a group is created, click More > Scale In in the Operation column in the Group Information area.
  4. On the displayed page, view the current instance configuration and specify the number of nodes to be removed.

    Figure 1 Specifying the number of nodes to be removed

  5. Click Next.
  6. On the displayed page, click Submit if all configurations are correct.
Parent topic: Instance Management