The ADNR function is provided by the ADNR application, which uses the z/OS® Load Balancing Advisor function.
An external load balancer is not required.
The ADNR application communicates with the Advisor using the Server/Application State Protocol (SASP). In SASP protocol terms, the Advisor is known as a Global Workload Manager (GWM). The terms Advisor and GWM are used interchangeably. From the GWM's perspective, the ADNR application appears as a load balancer. Despite its appearance as a load balancer to the GWM, ADNR does not perform load balancing. The z/OS Load Balancing Advisor supplies sysplex resource availability and weight information to what it views as load balancers, including ADNR. ADNR uses the availability information but does not use the weight information.
For more information about this function, see z/OS Load Balancing Advisor.
For more information about z/OS Load Balancing Advisor configuration considerations, see z/OS Load Balancing Advisor configuration considerations.