Help Center> CloudTable Service> User Guide> Cluster Mode> Managing Clusters> Expanding Cluster Capacity
View PDF

Expanding Cluster Capacity

You can increase computing units to expand cluster capacity and improve system computing and storage capabilities. Increasing computing units is charged. You can dynamically increase the number of computing units based on site requirements or service conditions. The cluster automatically implements load balancing to ensure service continuity and smooth capacity expansion.

Before increasing TSD units, ensure that OpenTSDB has been enabled. If it is not enabled, follow instructions in Enabling OpenTSDB to enable it.

Precautions

  • You can expand cluster capacity when a cluster is in the In service state and a task is not in any state or is in any of the following states: Unit capacity expansion failed, and Enabling OpenTSDB failed.
  • The number of computing units to be added must be less than or equal to the remaining quotas. Otherwise, the system will prompt a message indicating that capacity expansion is not allowed.

    Currently, each user's default computing unit quota is 32. In the upper right of the management console, choose Resources > My Quota. On the displayed Service Quota page, view the used quota and total quota. If the quota is insufficient, click Increase Quota in the upper right of the page to increase computing unit quotas.

  • During cluster capacity expansion, the system does not automatically restart the cluster, ensuring service continuity and smooth capacity expansion.
  • If the capacity expansion fails, Unit capacity expansion failed is displayed in the Task Status column, and the cluster automatically rolls back to the state before capacity expansion. You can try again. If you have any questions, contact technical support.

Increasing Computing Units

  1. Log in to the CloudTable management console.
  2. Click in the upper left corner to select a region.
  3. In the left navigation pane, click Cluster Mode.
  4. In the cluster list, locate the row that contains the target cluster, and choose More > Expand Capacity. Expand Capacity page is displayed.

    Alternatively, you can click the name of the target cluster in the cluster list. On the displayed cluster details page, click Expand Capacity in the upper right part of the page.

  5. On the Expand Capacity page, set the following parameters and click Next.

    Table 1 Capacity expansion parameters

    Parameter

    Description

    Unit Type

    Select the type of the unit to be added. The options are as follows:

    • RS Unit
    • TSD Unit: Before increasing TSD units, ensure that OpenTSDB has been enabled. If it is not enabled, follow instructions in Enabling OpenTSDB to enable it.

    Expand to

    Total number of units of the selected unit type after capacity expansion.

    A maximum of two computing units can be added at a time, and a maximum of 10 computing units can be added. A cluster supports a maximum of 100 computing units.

  6. Click Submit to start capacity expansion.
  7. Click Back to Cluster List to switch to the cluster list page.

    If Unit expanding is displayed in the Task Status column, the cluster is being expanded. In this case, the cluster status is still In service.

    After the capacity expansion is successful, click the cluster name in the cluster list. On the displayed cluster information page, you can view the number of computing units after capacity expansion.

Parent topic: Managing Clusters