Terms
Application container:
A phyical machine or virtual machine where operation systems run
Application instance:
Business codes in deployment packages (such as war). There are multiple code duplications because applications generally run at different service addresses
Application cluster:
A cluster composed of multiple application instances
Application process:
The operating system process where an application instance runs
Application group:
A business cluster (logical concept) composed of multiple application clusters and specified manually
Application ID:
The unique identifier of an application type
Application instance ID:
The unique identifier of the application instances belonging to the same application type