Use ApsaraDB for RDS Read-Only Instances to Improve Database Performance

This lab uses Alibaba Cloud ApsaraDB for RDS (RDS). The lab introduces the read/write splitting feature of RDS and describes how to add read-only instances. Read/write splitting implements the automatic forwarding of read/write requests through a read/write splitting address. A single instance may be unable to address the read pressure in a use case where there are few write requests but massive read requests. In this case, main services may be affected. To achieve auto scaling of