Manually Scaling Down Storage Space

Scenarios

As data volumes decrease, you can scale down storage space to avoid low database node utilization and resource waste.

Usage Notes

To scale down storage, ensure the new storage space is at least 1.25 times more than the used space and rounded up.
You do not need to restart the instance while scaling its storage. The change has no impact on existing data, services, or your databases.

Read-only Instance

To maintain stability when storage is about to be exhausted, your GeminiDB Redis instance will become read-only, and its data cannot be modified. If this happens, you can scale up the storage to restore the instance status.

Table 1 describes the read-only status of instances with classic storage.

**Table 1** Read-only status of instances with classic storage
Storage	Description
< 600 GB	When the storage usage reaches 97%, the instance becomes read-only. When the storage usage decreases to 85%, the instance exits the read-only mode.
≥ 600 GB	If the remaining storage is less than 18 GB, the instance becomes read-only. When the remaining storage is greater than or equal to 90 GB, the instance exits the read-only mode.

Table 2 describes the read-only status of instances with cloud native storage.

**Table 2** Read-only status of instances with cloud native storage
Storage	Description
< 16,000 GB	When the storage usage reaches 97%, the instance becomes read-only. When the storage usage decreases to 85%, the instance exits the read-only mode.
≥ 16,000 GB	If the remaining storage is less than 480 GB, the instance becomes read-only. When the remaining storage is greater than or equal to 2400 GB, the instance exits the read-only mode.

Procedure

Log in to the GeminiDB console.
On the Instances page, locate the target instance and choose More > Scale Storage Space in the Operation column.

Figure 1 Scale Storage Space
On the displayed page, specify the new storage space and click Next.

Figure 2 Scale Storage Space

Select at least 1 GB each time, and the value must be an integer.
On the displayed page, confirm the storage space.
- Yearly/Monthly
  - If you need to modify your settings, click Previous.
  - If you do not need to modify your settings, click Submit and complete the payment.
- Pay-per-use
  - If you need to modify your settings, click Previous.
  - If you do not need to modify your settings, click Submit.
Check the results.
- When the scaling task is ongoing, the instance status is Scaling storage space.
- After the scaling task is complete, the instance status becomes Available.
- Click the instance name. In the Specification Information area on the Basic Information page, you can view the new storage space.

Log in to the GeminiDB console.
On the Instances page, click the target instance.
In the Specification Information area on the Basic Information page, click Scale.

Figure 3 Scaling storage
On the displayed page, specify the new storage space and click Next.

Figure 4 Scaling storage

Select at least 1 GB each time, and the value must be an integer.
On the displayed page, confirm the storage space.
- Yearly/Monthly
  - To modify your settings, click Previous.
  - If you do not need to modify your settings, click Next and complete the payment.
- Pay-per-use
  - To modify your settings, click Previous.
  - If you do not need to modify your settings, click Submit.
Check the results.
- When the scaling task is ongoing, the instance status is Scaling storage space.
- After the scaling task is complete, the instance status becomes Available.
- Click the instance name. In the Specification Information area on the Basic Information page, you can view the new storage space.