-This section describes the use cases and scenarios to verify the
-requirements of Escalator.
+This section describes the use cases in different system configuration
+to verify the requirements of Escalator.
A HA configuration system is very popular in the operator's data centre.
It is a typical product environment. It is always running 7\*24 with VNFs
running on it to provide services to the end users.
A HA configuration system is very popular in the operator's data centre.
It is a typical product environment. It is always running 7\*24 with VNFs
running on it to provide services to the end users.
A non-HA configuration system is normally deployed for experimental or
development usages, such as a Vagrant/VM environment.
A non-HA configuration system is normally deployed for experimental or
development usages, such as a Vagrant/VM environment.
Use case #1: Smooth upgrade in a HA configuration
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
For a system with HA configuration, the operator can use Escalator to
Use case #1: Smooth upgrade in a HA configuration
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
For a system with HA configuration, the operator can use Escalator to