To achieve a balanced load distribution in the target system, you must define a group of application servers as an RFC destination. When processing tasks in parallel, you can use the group destination only in connection with the asynchronous RFC.
Which resources are available on each application server depends on the current system load.
To display and maintain the RFC groups, proceed as follows:
Call transaction SM59.
From the RFC destination overview screen, choose.
You then see the following:
the names of any RFC groups that have already been defined
a list of the instances (host, system and instance number) in your SAP system
the current status (active or not) of each server.
To define an RFC group, choose. Enter a server group name and an instance in the dialog window.
To add instances to an existing group, double click the group name and enter a new instance in the dialog window.
By creating duplicate entries, you can assign a server to more than one group. In this case, jobs that use the group will compete for free work processes on the shared server(s).
You could use groups to allow different parallel-processed jobs to run at the same time without competing for the same servers. In this case, the different groups used by the jobs would specify different servers.
You could also use groups to separate processing from servers on which dialog users are active. In this case, the group used for processing would name servers other than those in the logon groups for users.