Terminology

An explanation of the terms used to describe the details of the engine that drives parallel jobs.

• Operators. These underlie the stages in an InfoSphere® DataStage® job. A single stage might correspond to a single operator, or a number of operators, depending on the properties you have set, and whether you have chosen to partition or collect or sort data on the input link to a stage. At compilation, InfoSphere DataStage evaluates your job design and will sometimes optimize operators out if they are judged to be superfluous, or insert other operators if they are needed for the logic of the job.
• OSH. This is the scripting language used internally by the parallel engine.
• Players. Players are the workhorse processes in a parallel job. There is generally a player for each operator on each node. Players are the children of section leaders; there is one section leader per processing node. Section leaders are started by the conductor process running on the conductor node (the conductor node is defined in the configuration file).