Multi-system and Parallel Sysplex support
Job Optimizer Pipes services can be provided in a single system or multi-system (Parallel Sysplex or non-Parallel Sysplex) environment.
The Job Optimizer Pipes address space must be activated in each system in which jobs or steps that are using pipes will be run.
When working in a single system or in a multi-system non-Parallel Sysplex environment, Job Optimizer Pipes works in Local mode. In this mode, each system is managed separately. Applications that are running in parallel and sharing a pipe cannot run in different systems.
In a Parallel Sysplex environment, Job Optimizer Pipes can work in Local or Global mode. In Local mode, Job Optimizer Pipes manages each system separately. In Global mode, all of the systems are handled as one system, which allows applications that are running in parallel and sharing a pipe to run in different systems. The Coupling Facility (CF) is used by all systems to share data (for example, the Pipe List).
When all of the participants of a pipe run in the same system, the pipe is called a Local pipe. Local pipes can be used in either Local or Global mode. When the participants of a pipe run in different systems, the pipe is called a Global pipe. Global pipes can be used only in Global mode.
A Global pipe is managed by Job Optimizer Pipes in the system on which the first writer of the pipe is executing. This system is called the Pipe Home System (PHS). The Pipe Control Tasks (PCT) operates in the Job Optimizer Pipes address space of that system. Participants of a Global pipe that run in the PHS are called Local participants. Participants of a Global pipe that do not run in the PHS are called Remote participants. All participants use Parallel Sysplex services to access the pipe buffers.
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