PolarDB allows you to individually manage nodes. This topic describes the node management operations.
Specify a custom node name
If your cluster has multiple nodes used across various business scenarios, you can manually rename the nodes in the PolarDB console for easier identification and management based on the specific business scenarios they serve.
Usage notes
Each node has a name and a role. During a primary/secondary node switchover, the roles of the nodes may change but the names of the nodes remain unchanged. For more information, see Automatic failover and manual failover.
Pre-switchover
Post-switchover
Procedure
Go to the PolarDB console. Find the cluster that you want to manage on the Clusters page. On the Basic Information page of the cluster, find the node that you want to manage in the Database Nodes section. In the information box of the node, find the node name and click Modify. 
Restart a node
You can restart a node in the PolarDB console based on your business requirements.
Usage notes
If a read-write splitting connection is established after a read-only node is restarted, PolarProxy forwards requests on the connection to the read-only node. If a read-write splitting connection is established before a read-only node is restarted, PolarProxy does not forward requests on the connection to the read-only node. If you want PolarProxy to forward requests on the connection to the read-only node, you can restart your application to close and re-establish the connection.
When you restart a node, services may be interrupted for up to 1 minute. We recommend that you perform this operation during off-peak hours and make sure that your applications can automatically reconnect to the cluster.
The amount of time required to restart a node depends on the amount of data of your business. Several hours may be required to restart a node. Proceed with caution.
Procedure
Go to the PolarDB console. Find the cluster that you want to manage on the Clusters page. On the Basic Information page of the cluster, find the node that you want to manage in the Database Nodes section. In the information box of the node, click Restart. 
Related API operations
Operations | Description |
Restarts a node of a PolarDB cluster. |