Column Generator stage: Advanced section

This section allows you to specify the following:

• Execution Mode. The stage can execute in parallel mode or sequential mode. In parallel mode the input data is processed by the available nodes as specified in the Configuration file, and by any node constraints specified on the Advanced tab. In Sequential mode the entire data set is processed by the conductor node.
• Combinability mode. This is Auto by default, which allows IBM DataStage to combine the operators that underlie parallel stages so that they run in the same process if it is sensible for this type of stage.
• Preserve partitioning. This is Propagate by default. If you have an input data set, it adopts Set or Clear from the previous stage. You can explicitly select Set or Clear. Select Set to request the next stage should attempt to maintain the partitioning.
• Node pool and resource constraints. Select this option to constrain parallel execution to the node pool or pools or resource pool or pools specified in the grid. The grid allows you to make choices from drop down lists populated from the Configuration file.