A zero-load node is a control node that supports dry-run scheduling only and does not generate data. It usually serves as the root node of a workflow.

Background information

You can configure an output table for a zero-load node so that the output table can be used as an input table of another node. However, the zero-load node does not process the table data.

Procedure

  1. Go to the DataStudio page.
    1. Log on to the DataWorks console.
    2. In the left-side navigation pane, click Workspaces.
    3. In the top navigation bar, select the region where your workspace resides, find the workspace, and then click Data Analytics in the Actions column.
  2. On the Data Development tab, move the pointer over the Create icon icon and choose Universal > Virtual node.
    Alternatively, you can click a workflow in the Business process section, right-click General, and then choose New > Virtual node.
  3. In the New node dialog box, set the Node name and Destination folder parameters.
    Note The node name must be 1 to 128 characters in length and can contain letters, digits, underscores (_), and periods (.). It is not case-sensitive.
  4. Click Submit.
  5. On the node configuration tab, click the Scheduling configuration tab in the right-side navigation pane. On the Scheduling configuration tab, set the scheduling properties for the node. For more information, see Basic properties.
  6. Save and commit the node.
    Notice You must set the Rerun attribute and Dependent upstream node parameters on the Scheduling configuration tab before you can commit the node.
    1. Click Save icon in the toolbar to save the node.
    2. Click Submit icon in the toolbar to commit the node.
    3. In the Submit New Version dialog box, enter your comments in the Change description field.
    4. Click OK.
    In a workspace in standard mode, you must click Publish in the upper-right corner after you commit the AnalyticDB for MySQL node. For more information, see Deploy a node.
  7. Test the node. For more information, see Auto triggered nodes.