Read replicas are used to enhance the read capabilities and reduce read pressure on DB instances.

After a DB instance is created, you can create read replicas for it.

If you select the single AZ type, read replicas are deployed in the same AZ as the primary node.
If you select the multi-AZ type, read replicas are deployed in different AZs from the primary node to ensure high reliability.

Log in to the management console.
Click in the upper left corner and select a region and a project.
Click Service List. Under Databases, click GaussDB(for MySQL).
On the Instances page, locate the target DB instance and choose More > Create Read Replica in the Operation column.
Alternatively, click the target DB instance. In the DB Instance Topology area on the Basic Information page, click to create read replicas.
On the displayed page, specify Failover Priority and Quantity and then click Create Now.
After read replicas are created, you can manage them following the instructions provided in Managing a Read Replica.

Creating a Read Replica