What are the types of stage?
A stage can be passive or active. A passive stage handles access to databases for the extraction or writing of data. Active stages model the flow of data and provide mechanisms for combining data streams, aggregating data, and converting data from one data type to another. There are two types of stage :
Built in stages : Supplied with DataStage and used for extracting, aggregating, transforming, or writing data.
Plug in stages : Additional stages defined in the DataStage Manager to perform tasks that the built-in stages do not support.