Help Center/ GeminiDB/ GeminiDB Influx API/ Working with GeminiDB Influx API/ Instance Modifications/ Scaling Storage Space/ Manually Scaling Down Storage Space of a GeminiDB Influx Instance
Updated on 2026-05-08 GMT+08:00
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Manually Scaling Down Storage Space of a GeminiDB Influx Instance

Scenarios

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

Usage Notes

  • The target storage after scale-down must exceed 125% of the used storage. The value is 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.
  • Storage can be scaled down only for cluster (performance-enhanced) instances with classic storage.

Billing

During the scale-down, you are billed for the original storage capacity. Once the scale-down is complete, billing switches to the new storage capacity.

Table 1 Billing

Billing Mode

Operation

Impact on Price

Yearly/Monthly

Scaling down storage

After the scale-down, the new storage takes effect for the remaining subscription period. As the new configuration costs less than the previous one, Huawei Cloud will refund you the price difference.

Example (The specifications and prices below are for reference only. The actual prices are displayed on the console.)

Assume that you purchased a yearly/monthly GeminiDB Influx instance with 80 GB of storage for one month on April 8, 2023, at a unit storage price of $1 USD/GB/month. On April 18, 2023, you reduced 40 GB of storage, bringing the total to 40 GB. The price difference is calculated as follows:

Refund amount = Reduced storage × Unit price x Remaining period

The remaining period in the formula is calculated by dividing remaining days in each calendar month by the total days in that month. In this example, the remaining period is 0.6581 [12 (remaining days in April)/30 (total days in April) + 8 (remaining days in May)/31 (total days in May)]. The refund amount is therefore $26.3 USD (40 × 1 × 0.6581).

For details, see Yearly/Monthly Billing.

Pay-per-use

Scaling down storage

After storage is scaled down, a new order is generated and you will be billed at the new price. The old order is automatically invalidated.

For details, see Pay-per-Use Billing.

Read-only Instance

To maintain instance stability, the system checks its storage every 10 seconds. If your GeminiDB Influx instance is running out of storage, it 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 2 describes the read-only status of instances with classic storage.
    Table 2 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 3 describes the read-only status of instances with cloud native storage.
    Table 3 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 2,400 GB, the instance exits the read-only mode.

Procedure

  1. Log in to the GeminiDB console.
  2. Method 1:

    On the Instances page, locate the target instance and choose More > Scale Storage Space in the Operation column.
    Figure 1 Scaling storage space

    Method 2:

    On the Instances page, click the target instance name.

    In the Specification Information area on the Basic Information page, click Scale.
    Figure 2 Scaling storage space

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

    Figure 3 Scaling storage space

    At least 1 GB must be added each time, and the value must be an integer.

  4. 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.

  5. Check the results.

    • During the scale-down process, the instance status becomes Scaling storage space.
    • After the scaling task is complete, the instance status becomes Available.
    • Click the instance name. In the Storage Space area on the Basic Information page, check the new storage space.

Parent Topic: Scaling Storage Space