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System Management Concepts: Operating System and Devices

Setting Up WLM

WLM offers a fine level of control over resource allocation. However, it is easy to set up conflicting values for the various parameters and obtain undesirable system behaviors. The following tips can help you avoid creating conflicts:

Specifying WLM Properties

You can specify the properties for the WLM subsystem by using either a Web-based System Manager graphical user interface, SMIT, an ASCII-oriented user interface, or by creating flat ASCII files. The Web-based System Manager and SMIT interfaces record the information in the same flat ASCII files. These files are called the WLM property files and are named classes, description, rules, limits, and shares. The WLM property files can only be loaded by the root user.

You can define multiple sets of property files, defining different configurations of workload management. These configurations are usually located in subdirectories of /etc/wlm. A symbolic link /etc/wlm/current points to the directory containing the current configuration files. This link is updated by the wlmcntrl command when WLM starts with a specified set of configuration files.


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