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Adding Cluster Instance Nodes
Updated on 2022-02-22 GMT+08:00
Adding Cluster Instance Nodes
Scenarios
This section describes how to add nodes to a DB instance.
![](https://support.huaweicloud.com/intl/en-us/eu-west-0-usermanual-dds/public_sys-resources/note_3.0-en-us.png)
- You can add nodes when the instance status is Available, Deleting backup, or Checking restoration.
- A DB instance cannot be deleted when one or more nodes are being added.
Add mongos
- Log in to the DDS console.
- On the Instance Management page, click the target cluster instance.
- On the mongos tab in the Node Information area, click Add mongos.
- On the displayed page, specify Node Class, Quantity, and Parameter Group and click Next.
A cluster instance of Community Edition supports up to 12 mongos nodes.
- On the displayed page, confirm the node configuration information.
- If you need to modify your settings, click Previous to go back to the page for you to specify details.
- If you do not need to modify your settings, click Submit to add the nodes.
- View the result of adding nodes.
- This process takes about 10 to 15 minutes. The status of the DB instance in the instance list is Adding node.
- In the upper right corner of the DB instance list, click
to refresh the list. The instance status changes to Available.
- On the mongos tab in the Node Information area, view the information about the node you added.
- If the mongos fail to be added, you can revert them in batches or delete them one by one. For details, see section Reverting Cluster Instance Nodes.
Add shard
- Log in to the DDS console.
- On the Instance Management page, click the target cluster instance.
- On the shard tab in the Node Information area, click Add shard.
- Specify Node Class, Storage Space, Quantity, and Parameter Group and click Next.
- The storage space you applied for will contain the system overhead required for inode, reserved block, and database operation. The storage space must be an integer multiple of 10.
- A cluster instance of Community Edition supports up to 12 shard nodes.
- On the displayed page, confirm the node configuration information.
- If you need to modify your settings, click Previous to go back to the page for you to specify details.
- If you do not need to modify your settings, click Submit to add the nodes.
- View the result of adding nodes.
- This process takes about 10 to 15 minutes. The status of the DB instance in the instance list is Adding node.
- In the upper right corner of the DB instance list, click
to refresh the list. The instance status changes to Available.
- On the shard tab in the Node Information area, view the information about the node you added.
- If the shards fail to be added, you can revert them in batches or delete them one by one. For details, see section Reverting Cluster Instance Nodes.
Parent topic: Instance Management
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