Intelligent Resource Director

On IBM mainframes running the z/OS operating system, Intelligent Resource Director (IRD) is software that automates the management of CPU resources and certain I/O resources.

IRD is implemented as a collaboration between Workload Manager (WLM), a component of z/OS, and the PR/SM Logical Partitioning (LPAR) hypervisor, a function of the mainframe hardware.

Major IRD functions are:

IRD's objective is to optimise the use of computing resources while enabling WLM to meet its workload goals. So, for example, IRD will not vary offline logical processors to the point where doing so would cause workloads to miss their goals.

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