How to Create LU Pools
Although you can create individual LUs and assign them to users and groups, using LU pools to manage and deploy a large number of LUs is a more efficient method of administering these resources.
LU pools are groupings of 3270, LUA, or downstream LUs that allow you to maximize access to LUs. A user, LUA application, or downstream system using the pool can get LU access as long as one of the pooled LUs is available. If some of the pooled LUs are not functioning, the user, LUA application, or downstream system will not be affected, as long as another LU in the pool is available.
LU pools allow groups of intermittent users to use resources efficiently. For example, ten 3270 users who only need intermittent access may find that a pool of five 3270 LUs is adequate for their needs.
If a user needs access to multiple LU sessions, you can assign one LU or LU pool for each session that the user needs. A pool can be assigned multiple times to the same user.
An LU can be removed from an LU pool by simply deleting it from the pool.
The following procedures will help you manage your LU pools:
To create LU pools
To assign a 3270 LU to a connection
To assign LUs and LU pools to users and groups
To view LUs or pools assigned to users
To add 3270 LUs to a pool
To add a workstation and assign LUs
To remove an LU from a pool
To create LU pools
In SNA Manager, right-click the Pools folder, point to New, and then click 3270 Display LU Pool.
In Pool Properties, enter a name for your pool, up to eight characters in length. A comment is optional.
Leave the check box cleared, and click OK.
The new pool appears in the Pools folder.
To assign a 3270 LU to a connection
In SNA Manager, expand SNA service for the server you are working with, and then expand Connections.
Right-click the connection where you want to add the LU, point to New, and click the type of 3270 LU you want to assign.
In the 3270 LU Properties box, enter the LU Name. The LU number is system-assigned.
Click OK to exit.
On the Action menu, click Save Configuration.
To assign LUs and LU pools to users and groups
In SNA Manager, right-click the LU or LU pool, click Assign to User, and then select the users you want to assign.
Click OK.
Verify that the state of the server is active and that the connections are available (either OnDemand or Active). If the server is not active, right-click the server in SNA Manager, and then click Start.
To view LUs or pools assigned to users
In SNA Manager, double-click Configured Users. Then click the user or group that you want to view. The details pane shows the LUs and pools assigned to that user or group, plus other details, such as status and LU number.
To view local or remote APPC LUs assigned to a user or group, right-click the targeted user or group, and click Properties under Configured Users. Click the APPC Defaults tab. When you are done viewing, click Cancel.
To add 3270 LUs to a pool
In SNA Manager, expand Servers, and then expand the server you are working with.
Expand Connections, and then click the connection that contains the needed 3270 LUs.
In the right pane, right-click the 3270 LU that you want to assign and click Assign Pool.
In the dialog box, click the pool to which you want to assign the LU, and then click OK.
Repeat steps 2 and 3 for each LU that you want to assign to a pool.
On the Action menu, click Save Configuration.
Note
To verify that the LUs are in the correct pool, make sure the Pools node is expanded, double-click the name of the affected pool, and view its LUs in the details pane.
Note
Both the LUs and the LU pool must be of the same type (3270).
To add a workstation and assign LUs
In SNA Manager, right-click Workstations, point to New, and then click Workstation.
Fill in the Workstation Properties dialog box.
Click OK to add the new workstation.
To assign LUs to the workstation, double-click Connections, and then double-click the connection that contains the needed LUs.
Right-click the LU that you want to assign, and click Assign to Workstation.
In the dialog box, click the workstation, and then click OK.
On the Action menu, click Save Configuration.
Note
All workstation users must be members of the same SNA subdomain. You can avoid having to add each user to the subdomain by assigning the Everyone group to the subdomain and assigning no LUs to the group.
To remove an LU from a pool
In SNA Manager, click Pools.
Right-click the LU that you want to remove, and then click Delete.
In the Confirmation dialog box, click Yes to delete the LU.
On the Action menu, click Save Configuration.
On the Action menu, click Refresh.
Note
An empty pool provides no LU access.