Using and Administering

Configuring LoadLeveler

One of your main tasks as system administrator is to configure LoadLeveler. To configure LoadLeveler, you need to know what the configuration information is and where it is located. Configuration information includes the following:

• The LoadLeveler user ID and group ID
• The configuration directory
• The global configuration file

LoadLeveler sets up the following default values for the configuration information:

• loadl is the LoadLeveler user ID and the LoadLeveler group ID.

  LoadLeveler daemons run under this user ID in order to perform file I/O, and many LoadLeveler files are owned by this user ID.

• The home directory of loadl is the configuration directory.
• LoadL_config is the name of the configuration file.

You can run your installation with these default values, or you can change any or all of them. To override the defaults, you must update the following keywords in the /etc/LoadL.cfg file:

LoadLUserid

Specifies the LoadLeveler user ID.

LoadLGroupid

Specifies the LoadLeveler group ID.

LoadLConfig

Specifies the full path name of the configuration file.

Note that if you change the LoadLeveler user ID to something other than loadl, you will have to make sure your configuration files are owned by this ID.

You can also override the /etc/LoadL.cfg file. For an example of when you might want to do this, see Querying Multiple LoadLeveler Clusters.