Connecting the Dots: LPARs, HiperDispatch, WLM, zIIPs and zAAPs

     Your z/OS System and WLM manage different types of transaction and server workloads with multiple dispatchable units - TCBs, SRBs, enclave SRBs. Multi address space application scenarios use a combination of velocity and response time goals across multiple WLM service classes to manage performance. HiperDispatch now plays a role in how ready work gets dispatched in z/OS, as well as how PR/SM dispatches logical CPs. In addition, some of these workloads are also eligible to be redirected to zIIP and zAAP specialty engines. Let’s connect all these pieces together to understand WLM management, what makes work eligible for zIIPs and zAAPs, and the role of HiperDispatch.