The Parallel engine configuration file

One of the great strengths of InfoSphere® DataStage® is that, when designing parallel jobs, you don't have to worry too much about the underlying structure of your system, beyond appreciating its parallel processing capabilities.

If your system changes, is upgraded or improved, or if you develop a job on one platform and implement it on another, you don't necessarily have to change your job design.

InfoSphere DataStage learns about the shape and size of the system from the configuration file. It organizes the resources needed for a job according to what is defined in the configuration file. When your system changes, you change the file not the jobs.

This chapter describes how to define configuration files that specify what processing, storage, and sorting facilities on your system should be used to run a parallel job. You can maintain multiple configuration files and read them into the system according to your varying processing needs.

When you install InfoSphere DataStage, the system is automatically configured to use the supplied default configuration file. This allows you to run parallel jobs right away, but is not optimized for your system. Follow the instructions in this chapter to produce configuration file specifically for your system.