Manually Scaling Down Storage Space

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.
If your yearly/monthly instance is running out of storage, additional usage will be billed on a pay-per-use basis. To avoid these extra costs and maintain the benefits of your yearly/monthly subscription, you are advised to scale up storage.

Read-only Instance

To maintain stability when storage is about to be exhausted, your GeminiDB HBase 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** 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.

Instances with classic storage are not read-only.

Procedure

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

Click the instance name. In the Storage Space area on the Basic Information page, click Scale.
On the displayed page, specify new storage and click Next.

Figure 1 Scaling down 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
  - To modify your settings, click Previous to go back to the page where you specify details.
  - If you do not need to modify your settings, click Next and complete the payment.
- Pay-per-use
  - To modify your settings, click Previous to go back to the page where you specify details.
  - If you do not need to modify your settings, click Submit.
Check the results.
- During the scale-down process, the instance status becomes Scaling storage space.
- After the scaling process, the instance status becomes Available.
- Click the instance name. In the Storage Space area on the Basic Information page, check the new storage space.