Connection optimization registration

Server applications register with the MVS™ Workload Manager (WLM), which quantifies the availability of server resources within a sysplex. The WLM must be configured in goal mode on all hosts within the sysplex. TCP/IP stacks can also register with the WLM to provide information on the started IP addresses, or static definitions can be used if stacks do not support registration. When registering, server applications provide the following information:
Group name
This is the name of a cluster of equivalent server applications in a sysplex. It is the name within the sysplex domain that client applications use to access the server applications. CICS® uses the DNSGROUP parameter of the TCPIPSERVICE resource definition as the group name to register with the WLM.
Server name
This is the name of the server application instance. The server name must be unique among all servers that share the same group name. A server application instance can belong to more than one group. CICS registers with WLM using the specific APPLID of the region as specified by the APPLID system initialization parameter.
Host name
This is the host name of the TCP/IP stack on which the server application runs. During startup, CICS calls the TCP/IP function gethostbyaddr to determine the host name of the machine on which it is running, and passes it to the WLM for registration.