Setting up Workload Manager

Class definitions, class attributes, the shares and limits, and the automatic class assignment rules, can be entered using SMIT, or the WLM command-line interface. These definitions and rules are kept in plain text files, that can also be created or modified using a text editor.

These files (called WLM property files) are kept in the subdirectories of /etc/wlm. A set of files describing super classes and their associated subclasses define a WLM configuration. The files for the WLM Config configuration are in /etc/wlm/Config. This directory contains the definitions of the WLM parameters for the super classes. The files are named description, classes, shares, limits, and rules. This directory might also contain subdirectories with the name of the super classes where the subclass definitions are kept. For example, for the superclass Super of the WLM configuration Config, the directory /etc/wlm/Config/Super contains the property files for the subclasses of the superclass Super. The files are named description, classes, shares, limits, and rules.

After a WLM configuration has been defined by the system administrator, it can be made the active configuration using the smit wlmmanage fast path, or the wlmcntrl command.

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.