When you run a big data mapping, you can choose the environment to run the mapping in, native environment or Hadoop environment. If you run the mapping in the Hadoop environment, the mapping will run on the Blaze engine, the Spark engine, or the Hive engine.
When you validate a mapping, you can validate it against one or all of the engines. The Developer tool returns validation messages for each engine. You can then choose to run the mapping in the native environment or in the Hadoop environment. When you run the mapping in the native environment, the Data Integration Service processes the mapping logic. When you run the mapping in the Hadoop environment, the Data Integration Service uses a proprietary rule-based methodology to determine the best engine to run the mapping. The rule-based methodology evaluates the mapping sources and the mapping logic to determine the engine. The Data Integration Service translates the mapping logic into code that the engine can process, and it transfers the code to the engine.