Chapter 4 How do I use WLM?

The WLM configuration allows you to:

You then assign shares-based or goal-based SLOs to the workloads. Optionally, you indicate when each SLO is active.

If your configuration has workloads with performance goals, you can also specify a means for collecting the performance data of those workloads. Your performance collecting programs then use a utility called wlmrcvdc or an API to provide the data to WLM. The utility and the API are included with WLM and are explained in the section “What methods exist for sending data to WLM?”. For more details about using WLM with performance metrics, see Appendix H “Advanced WLM usage: Using performance metrics”.

Next, WLM compares, at every interval, the reported and desired performance levels for each SLO. WLM then adjusts, if needed, CPU resources for the SLOs’ associated workloads based on the resources needed to satisfy the SLOs and their assigned priorities.

Also, WLM generates SLO status information that is made available through EMS.