Database Autonomy Service (DAS) monitors the storage of a database instance. When the storage is insufficient, DAS can automatically expand it to ensure business stability. This topic describes how to enable the automatic space expansion feature.

Prerequisites

  • The instance for which you want to enable the automatic space expansion feature is an ApsaraDB RDS instance that uses enhanced SSDs.
  • The Enable Autonomy Service switch is turned on for the instance for which you want to enable the automatic space expansion feature. For more information, see Autonomy center.
  • A RAM role that is linked to DAS is created to enable automatic space expansion. For more information, see AliyunServiceRoleForDAS role.
    Note If you have not created a RAM role that is linked to DAS when you enable automatic space expansion, DAS creates a role for you before automatic space expansion.

Background information

For more information, see AutoScale.
Note After you expand the storage, you cannot reduce the storage.

Procedure

  1. Log on to the DAS console.
  2. In the left-side navigation pane, click Instance Monitoring.
  3. On the Instance Monitoring page, find the instance for which you want to enable the automatic space expansion feature and click the instance ID. The instance details page appears.
  4. In the left-side navigation pane, click Autonomy Center.
  5. In the upper-right corner of the Autonomy Center page, click Autonomy Service Settings.
  6. In the Settings dialog box, turn on the Automatic Space Expansion switch.
  7. Select a value from the Available Storage Space drop-down list. Enter the required maximum amount of storage in the Maximum Storage of Automatic Expansion field.
    Note The billing method is the same as that for manually expanding the storage of an ApsaraDB RDS instance. For more information, see Specification change fees.
  8. Click OK.