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AIX 5L Problem Determination - IBM Redbooks

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ASCII files. The Web-based System Manager and SMIT interfaces use the WLM<br />

commands to record the information in the same flat ASCII files.<br />

These files are named as follows:<br />

classes Class definitions<br />

description Configuration description text<br />

limits Class limits<br />

shares Class target shares<br />

rules Class assignment rules<br />

These files are called the WLM property files. A set of WLM property files defines<br />

a WLM configuration. You can create multiple sets of property files, defining<br />

different configurations of workload management. These configurations are<br />

located in subdirectories of /etc/wlm. The WLM property files describing the<br />

superclasses of the Config configuration are the file's classes, description, limits,<br />

shares, and rules in /etc/wlm/Config. Then, the property files describing the<br />

subclasses of the superclass Super of this configuration are the file's classes,<br />

limits, shares, and rules in the directory /etc/wlm/Config/Super. Only the root<br />

user can start or stop WLM, or switch from one configuration to another.<br />

The command to submit the WLM property files, wlmcntrl, and the other WLM<br />

commands allow users to specify an alternate directory name for the WLM<br />

properties files. This allows you to change the WLM properties without altering<br />

the default WLM property files.<br />

A symbolic link, /etc/wlm/current, points to the directory containing the current<br />

configuration files. Update this link with the wlmcntrl command when you start<br />

WLM with a specified set of configuration files. The sample configuration files<br />

shipped with the operating system are in /etc/wlm/standard.<br />

WLM configuration is performed through the preferred interface, the Web-based<br />

System Manager (Figure 10-3 on page 276), through a text editor and <strong>AIX</strong><br />

commands, or through the <strong>AIX</strong> administration tool SMIT.<br />

Chapter 10. Performance problem determination 275

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