i5/OS work management

 

All of the work on the i5/OS^® operating system is submitted through the work management function. On the system, you can design specialized operating environments to handle different types of work to satisfy your system requirements.

However, when the operating system is installed, it includes a work management environment that supports interactive and batch processing, communications, and spool processing.

On the system, all user jobs operate in an environment called a subsystem, defined by a subsystem description, where the system coordinates processing and resources. Users can control a group of jobs with common characteristics independently of other jobs if the jobs are placed in the same subsystem. You can start and end subsystems as needed to support the work being done and to maintain the performance characteristics you want.

The basic types of jobs that run on the system are interactive, communications, batch, spooled, autostart, and prestart.

An interactive job starts when you sign on a workstation and ends when you sign off. An Advanced Program-to-Program Communication (APPC) batch job is a job started from a program start request from another system. A non-communications batch job is started from a job queue. Job queues are not used when starting a communications batch job. Spooling functions are available for both input and output. Autostart jobs perform repetitive work or one-time initialization work. Autostart jobs are associated with a particular subsystem, and each time the subsystem is started, the autostart jobs associated with it are started. Prestart jobs are jobs that start running before the remote program sends a program start request.

• Setting up your work management environment for DRDA
  One subsystem, called a controlling subsystem, starts automatically when you load the system. Two controlling subsystem configurations are supplied by IBM^®.

• APPC subsystems
  In a distributed relational database using a Systems Network Architecture (SNA) network, communications jobs and interactive jobs are the main types of work an administrator must plan to manage on each system.

• TCP/IP subsystems
  By default, the DDM TCP/IP server prestart jobs used for DRDA^® TCP/IP connections run in the QUSRWRK subsystem.

 

Parent topic:

Initial setup

 

Related concepts

Managing the TCP/IP server