Defining parallel and sequential operators

There are two execution modes for operators: parallel and sequential. Parallel operators execute on multiple processing nodes; sequential operators execute on a single processing node.

By default, the execution mode of an operator is parallel. You can use the following member functions to set the execution mode of an operator:

setRequestedKind(): Sets the requested execution mode of an operator to either parallel or sequential. If this function is not called, and setKind() is not called within describeOperator(), the operator defaults to parallel.
setKind(): Sets the execution mode of an operator to either parallel or sequential. This function can be called only from within describeOperator(). setKind() overrides a call to setRequestedKind(). If a call to setKind() specifies a different execution mode than setRequestedKind(), DataStage issues a warning.