Manually Adding Nodes to a GeminiDB DynamoDB-Compatible Instance

Scenarios

This section describes how to add nodes to your DB instance to match the increasing data volume. You can also delete nodes as required. For details, see Manually Deleting Nodes from a GeminiDB DynamoDB-Compatible Instance.

Usage Notes

Adding nodes may lead to the decrease of operations per second (OPS). Perform this operation during off-peak hours.
You can only add nodes when the instance status is Available or Checking restoration.
Instances that one or more nodes are added to cannot be deleted.
You can also delete nodes as required. For details, see Manually Deleting Nodes from a GeminiDB DynamoDB-Compatible Instance.
Table 1 lists the maximum number of nodes supported by different instance types.

Table 1 Number of instance nodes supported

Deployment Type

Max. Nodes

Classic

60

Cloud native

12

Table 1 lists the default maximum number of nodes. To add more, submit a service ticket on the console to contact the customer service.

**Table 1** Number of instance nodes supported
Deployment Type	Max. Nodes
Classic	60
Cloud native	12

Billing

**Table 2** Billing
Billing Mode	Operation	Impact on Price
Yearly/Monthly	Adding nodes	After nodes are added, the new configuration takes effect for the remaining subscription period. As the new configuration is priced higher than the old one, you will be charged 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 3-node yearly/monthly GeminiDB DynamoDB-Compatible instance with 1 vCPU and 6 GB of memory for one month on April 8, 2023 and expanded it to a 6-node instance with the same specifications on April 18, 2023. The price for the old configuration is $941.70 USD/month, and that for the new configuration is $1,883.40 USD/month. The price difference is calculated as follows: Price of adding nodes = New configuration price × Remaining period – Old configuration price × 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 price of adding nodes is therefore $619.73 USD (1883.4 × 0.6581 – 941.7 × 0.6581). For details, see Yearly/Monthly Billing.
Pay-per-use	Adding nodes	After nodes are added, 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.

Procedure

Log in to the Huawei Cloud console.
Method 1:

On the Instances page, click the target instance name.

In the Node Information area on the Basic Information page, click Add Node.
Figure 1 Node information

Method 2:

On the Instances page, locate the target instance and choose More > Add Node in the Operation column.

Figure 2 Adding nodes
On the displayed page, specify New Nodes and click Next.

Figure 3 Adding nodes
- New nodes are of the same specifications as existing nodes. Once a new node is added, its specifications cannot be changed.
- New nodes and the instance can be in different subnets of the same VPC.
On the displayed page, confirm the node configurations.
- Yearly/Monthly
  - If you need to modify your settings, click Previous.
  - If you do not need to modify your settings, click Next 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.
View the results.
- When new nodes are being added, the instance status is Adding node.
- After the nodes are added, the instance status becomes Available.
- Click the instance name. In the Node Information area on the Basic Information page, view information about the new nodes.