LoadLeveler allows you to define a parallel master node-which LoadLeveler will use as the first node for a job submitted to a particular class. To set up a parallel master node, code the following keywords in the node's class and machine stanzas in the administration file:
# MACHINE STANZA: (optional) mach1: type = machine master_node_exclusive = true # CLASS STANZA: (optional) pmv3: type = class master_node_requirement = true
Specifying master_node_requirement = true forces all parallel jobs in this class to use-as their first node-a machine with the master_node_exclusive = true setting. For more information of these keywords, see Step 1: Specify Machine Stanzas and Step 3: Specify Class Stanzas.