Adding Replica Set Instance Nodes
You can scale out replica set instances by adding replicas.
Add replicas for replica set instances in the following steps:
Go to the DDS Management Console.
Click Instance Management to go to the instance list page.
In the Operation column of the replica set instance for which you want to add replicas, click More. The Add Replica button is displayed.
Click Add Replica to go to the Adding Replica page.
On the Adding Replica page, select the number of replica set nodes you need as instructed and click Buy Now.
After making payment, wait for several minutes and refresh the detailed information of the instance. You can see that the replica set instance is scaled out.
Note：
You can add replicas to expand only three-node and five-node replica sets.