Different types of ApsaraDB for RDS instances are provided: common instances, dedicated instances, and dedicated-host instances. To distinguish from the instance type provided before January 2017, which we defined as common instances, the new instance types are defined as dedicated instances, among which dedicated-host instances have top-level configurations. A dedicated-host instance can be upgrade to the top level so that it can use a full physical machine.
The following list shows the features and applicable scenarios of various instance types:
|Dedicated instances/dedicated-host instances||
||It is applicable for business scenarios where a database-centric system is used, such as finance, e-commerce, government, medium and large -size Internet businesses.|
The differences between common and dedicated instances are shown in the following figure.