In scale in operations, you can decrease the number of hosts that are not required and can cut down the operational cost incurred on maintenance by decreasing the number of hosts, thereby reducing the system scale.

In the Smart Composer functionality, you can decrease the number of the hosts or the logical servers in a batch for each service unit. Also, in the management portal, you can decrease the number of the hosts and the logical servers separately by using the respective windows of the Management Portal window.

Example of system operations

The following figure shows an example of the system operations for reducing the scale, by decreasing the number of hosts. The system used in this example is set up in 4.2 System operations to expand the system scale by increasing the number of hosts (Scale out).

Figure 4-7 Example of the system operations for reducing the scale by decreasing the number of hosts

The following table describes the settings used in the example:

Table 4-22 Settings used in the example (system scale in)

Classification	Item	Example of settings
Entire system	Name of Web system	MyWebSystem
	Name of the service unit to be deleted	unit2
Host for allocating the Web server to be deleted	Host name	apsv3
	IP address (management IP address)#	192.168.100.13
	Name of the logical Web server	MyWebSystem_HTTP02
	Name of the logical performance tracer	MyWebSystem_PRF03
Host for allocating the J2EE server to be deleted	Host name	apsv4
	IP address (management IP address)#	192.168.100.14
	Name of the logical J2EE server	MyWebSystem_J2EE02
	Name of the logical performance tracer	MyWebSystem_PRF04

# If the network consists of one configuration, the IP address serves as both the business IP address and the management IP address.

Tasks to be executed and necessity of the tasks

The following table describes the tasks to be executed for the system scale in operation and the necessity of these tasks. Use the Smart Composer functionality to implement the system scale in.

Table 4-23 Tasks to be executed for the system scale in and the necessity of these tasks (when using the Smart Composer functionality)

Tasks to be implemented for the system scale in	Necessity of the tasks	Conditions for executing the tasks	References
Stopping the service unit	Y	Mandatory	4.3.2(1)
Deleting the service unit and unsetup of logical server environment	Y	Mandatory	4.3.2(2)

Legend:

Y: Mandatory task.