When you run mappings on the Blaze engine, the Data Integration Service pushes the mapping to a Hadoop cluster and processes the mapping on a Blaze engine. The Data Integration Service generates an execution plan to run mappings on the Blaze engine.
The Blaze engine execution plan simplifies the mapping into segments. The plan contains tasks to start the mapping, run the mapping, and create and cleanup the temporary tables and file required to run the mapping. The plan contains multiple tasklets and the task recovery strategy. The plan also contains pre and post grid task preparation commands for each mapping before running the main mapping on a Hadoop cluster. A pre-grid task can include a task such as copying data to HDFS. A post-grid task can include tasks such as cleaning up temporary files or copying data from HDFS.
You can view the plan in the Developer tool before you run the mapping and in the Administrator tool after you run the mapping. In the Developer tool, the Blaze engine execution plan appears as a workflow. You can click on each component in the workflow to get the details. In the Administrator tool, the Blaze engine execution plan appears as a script.