Assigning Output Devices to
Logical OMS (LOMS) 
Use
You perform an “inventory“ of the output devices that are to use the OMS. When doing so, you determine that the output devices can be sorted into groups that use the output management system in different ways. You can assign each group to a different logical OMS (LOMS).
This division into different LOMSs is optional. However, you must certainly define at least one LOMS. This is because when you want to create an output device that forwards its print requests to an OMS (access method E), you must assign it to an LOMS. It is not possible to assign devices directly to the real OMS.
Assigning the SAP output devices to different LOMSs can be useful for the following reasons:
· Using separate sets of operating system-specific commands: If your OMS is running on several platforms, you can define a different set of OMS commands for each operating system.
You have special printers that require extra SUBMIT command options. You can meet this requirement by assigning these printers to their own LOMS. You can then define a special command set that uses the special options for the LOMS.
If you want to change commands that apply to several LOMSs, you do not have to change each LOMS individually. You can organize your LOMS into command groups. If you change the commands for an LOMS in a command group, these changes also apply to all other LOMSs in the group.
· Using different OMS Services: You can use LOMSs to allow different sets of OMS services to be used, according to the printer.
You want to use RFC callback to track the status of critical printers in the shipping department. Less important printers should be tracked only by polling. You can meet this requirement by defining an LOMS for each group. In the critical LOMS, callback is activated. In the other LOMS, only polling is activated.
· Distribution of the Callback Workload: Should you want to distribute the workload of processing status reports from an OMS callback client, you can do so by defining separate LOMSs. For each LOMS, you can specify a different SAP server as the callback target.
If any of these requirements apply to you, then you may want to create your OMS definitions accordingly.
See also:
Integrating a Spool system into an External Output Management System
