HP-UX Workload Manager User's Guide

Example configuration files

usage_stretch_goal.wlm

Chapter 9334

usage_stretch_goal.wlm

This example shows the use of stretch goals in addition to base CPU

usage goals for several different workload groups. A priority 1 SLO

specifies a base CPU usage goal for the OTHERS group to ensure that it

receives between 1 and 100 CPU shares. Additional priority 1 SLOs are

defined for three additional groups to ensure that they receive between 1

and 200 CPU shares. For each of these three groups, an additional

priority 10 SLO defines a stretch goal calling for between 1 and 800 CPU

shares if any remain after the priority 1 SLOs are satisfied.

# Name:

# usage_stretch_goal.wlm

# Version information:

# $Revision: 1.6 $

# Caveats:

# DO NOT MODIFY this file in its /opt/wlm/examples/wlmconf location!

# Make modifications to a copy and place that copy outside the

# /opt/wlm/ directory, as items below /opt/wlm will be replaced

# or modified by future HP-UX WLM product updates.

# Purpose:

# Demonstrate workload groups with multiple SLOs at different

# priority levels, creating a base goal and a “stretch” goal (a goal

# that we’d like to have met if all other higher-priority SLOs are

# being met). All the SLOs are based on usage goals.

# With a usage goal, WLM adjusts a workload group’s number of CPU

# shares to keep its CPU utilization within a certain range. For

# example, if a workload group’s processes are using 20 CPU shares

# and have a 50 CPU share allocation, the group’s utilization is

# 20/50 or 40%. WLM attempts to keep a workload group’s utilization

# between a low and high bound--50% and 75% by default. To bring our

# example group’s utilization up to 50%, WLM would change its

# allocation from 50 shares to 40 shares. The utilization is

# then 20/40, or 50%.