"Administration" menu options > Managing policies > Configuring the Node Allocation policy

5.2.2 Configuring the Node Allocation policy

Viewpoint allows you to modify the settings of the Node Allocation policy, which specifies how node usage is prioritized.

To configure the Node Allocation policy

  1. If it is not already turned on, turn on the policy (see Turning Policies On and Off).

  2. Determine the prioritization of nodes from the following options:

    Policy Description
    Custom Priority Sorts nodes mathematically according to the formula you set up. The Custom Priority policy allows you to choose from many different components by which to sort the nodes.
    In Reported Order Sorts nodes in the order reported by the resource manager — typically alphabetically
    In Reverse Reported Order Sorts nodes in the opposite order reported by the resource manager, or the reverse of In Reported Order (this is the default setting)
    Processor Load Sorts nodes by the maximum amount of available CPU power
    Minimum Configured Resources Sorts nodes by the fewest configured memory resources that will meet all job requirements. It leaves the least amount of available memory on the node.
    Processor Speed Balance Sorts nodes by their balance of resources. This is typically balanced by the node processor speed.
    Node Speed

    Sorts nodes by their speed

    The speed is determined by parameters in the resource manager. If these parameters do not exist, the nodes are sorted in a random order.
  3. If you select Custom Priority, the configured settings appear on the right. You may change the existing settings, delete them using the red X, or add new ones using the Add button. To configure a new one, select a generic metric from the drop-down menu and specify a number. This number is a coefficient that is multiplied by the metric. All of these separate metrics are added together to create the priority. See the Moab Workload Manager documentation for a description of each metric and information about configuring generic metrics.

    4. Image 5-1: Custom Priority settings

    An administrator wants to configure a custom priority that packs tasks onto loaded nodes first

    In the Node Allocation page, select Custom Priority. Click the Add button to configure the metric. From the drop-down box, select Job Count and set the value to 1.

    Jobs will be sent to the nodes with the highest job count.

  4. When you finish configuring your node allocation policy, click Save.

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