What is the instance specification and lifecycle of the Aliyun service

　　 Instance Specification

An instance is the smallest unit that can provide computing services for your business, and it provides you with the appropriate computing power with a certain specification.

The specification of an ECS instance defines the two basic attributes of the instance's CPU, memory configuration (including CPU model, main frequency, etc.), but only the type of disk, mirror and network types can be uniquely identified for the specific service form of the instance.

　Instance life cycle

The life cycle of an instance is from the creation (purchase) to the final release (the package year monthly instance expires, the amount paid instance owes the downtime, or the user voluntarily releases the amount paid by the instance).

　　Instance intrinsic state

In this lifecycle, the instance has several inherent states, such as the following table: