Help Center/ TaurusDB/ User Guide/ HTAP Analysis (Standard Edition)/ Configuration Changes/ Changing the Nodes Specifications of a Standard HTAP Instance
Updated on 2025-08-21 GMT+08:00
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Changing the Nodes Specifications of a Standard HTAP Instance

Scenarios

After a standard HTAP instance is created, you can change the specifications of BE and FE nodes separately or simultaneously. The specifications of pay-per-use instances can be downgraded, and those of yearly/monthly instances can only be upgraded.

Constraints

  • You cannot reboot or delete the HTAP instance while its specifications are being changed.
  • You can change the specifications of your HTAP instance for an unlimited number of times.
  • You can change the specifications of an abnormal HTAP instance.

Billing

Table 1 Billing

Billing Mode

Operation

Impact on Price

Yearly/Monthly

Specification upgrade

After instance specifications are upgraded, the new instance specifications take effect in the original usage period.

You need to pay for the difference in price based on the remaining period.

The following prices are for reference only. The actual prices are displayed on the console.

Suppose you purchased a one-month single standard HTAP instance with one BE and three FE nodes (specifications: 4 vCPUs | 16 GB; storage: extreme SSD, 50 GB) in CN-Hong Kong on April 1, 2025. The instance price was $624.80 USD per month.

On April 15, 2025, you changed the BE node specifications to 8 vCPUs | 32 GB. The instance price was $914.80 USD per month.

Price difference = Price for the new instance specifications x Remaining period – Price for the original instance specifications x Remaining period

The remaining period is the remaining days of each calendar month divided by the maximum number of days in each calendar month.

In this example, the remaining period and price difference are calculated as follows: Remaining period = 15 (Remaining days in April)/30 (Maximum number of days in April) = 0.5. Price difference = $914.80 USD x 0.5 – $624.80 USD x 0.5 = $145 USD

Pay-per-use

Specification upgrade

After instance specifications are changed, the new instance specifications are billed by hour. For details, see Product Pricing Details.

Specification downgrade

Procedure

  1. Log in to the management console.
  2. Click in the upper left corner and select a region and project.
  3. Click in the upper left corner of the page and choose Databases > TaurusDB.
  4. On the Instances page, locate a TaurusDB instance and click its name to access the Basic Information page.
  5. In the navigation pane, choose HTAP Analysis.
  6. Locate the target HTAP instance and choose More > Change Instance Specifications in the Operation column.
  7. On the displayed page, change the node specifications.

    Table 2 Parameter description

    Parameter

    Description

    Node Type
    • Yearly/Monthly: You can only select either BE or FE.
    • Pay-per-use: You can select either BE or FE, or select both BE and FE.

    Backend Node Specifications

    If BE is selected for Node Type, the original specifications and type of BE nodes are displayed.

    Backend Node Specifications

    If BE is selected for Node Type, set the new specifications of BE nodes.

    Frontend Node Specifications

    If FE is selected for Node Type, the original specifications and type of FE nodes are displayed.

    Frontend Node Specifications

    If FE is selected for Node Type, set the new specifications of FE nodes.

  8. Click Next.
  9. Confirm settings.

    • If you need to modify your settings, click Previous.
    • If you do not need to modify your settings, click Submit for a pay-per-use or yearly/monthly instance.

  10. After the specifications are changed, view and manage them on the Basic Information page of the HTAP instance.
Parent Topic: Configuration Changes