Use a Create Cluster task to create, configure and start a Hadoop cluster. Use a Delete Cluster task to delete the same cluster after mapping tasks and any other tasks in the workflow are complete.

When you run a cluster workflow, the Create Cluster task issues commands to create a cluster of the size and type that you specify. Mapping tasks and other tasks in the workflow run on the same cluster or on another cluster that you specify. You can include a Delete Cluster task to terminate the cluster when all tasks are complete. If you do not include a Delete Cluster task, the cluster continues to run.