A Talend Spark Job can be run in any of the following modes:
Local: the Studio builds the Spark environment in itself at runtime to run the Job locally within the Studio. With this mode, each processor of the local machine is used as a Spark worker to perform the computations. This mode requires minimum parameters to be set in this configuration view.
Note this local machine is the machine in which the Job is actually run.
Standalone: the Studio connects to a Spark-enabled cluster to run the Job from this cluster.