Using and Administering

node

Specifies the minimum and maximum number of nodes requested by a job step. You must specify at least one of these values. The value of the node keyword applies only to the job step in which you specify the keyword. (That is, this keyword is not inherited by other job steps.)

The syntax is:

node = [min][,max]

Where:

min

Specifies the minimum number of nodes requested by the job step. The default is 1.

max

Specifies the maximum number of nodes requested by the job step. The default is the min value of this keyword. The maximum number of nodes a job step can request is limited by the max_node keyword in the administration file (provided this keyword is specified). That is, the maximum must be less than or equal to any max_node value specified in a user, group, or class stanza.

For example, to specify a range of six to twelve nodes, enter the following:

node = 6,12

To specify a maximum of seventeen nodes, enter the following:

node =  ,17

When you use the node keyword together with the total_tasks keyword, the min and max values you specify on the node keyword must be equal, or you must specify only one value. For example:

node = 6
total_tasks = 12

For information on specifying the number of tasks you want to run on a node, see Task Assignment Considerations,tasks_per_node, and total_tasks.