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®.
The first configuration includes the following subsystems:
- QBASE, the controlling subsystem, supports interactive, batch, and communications jobs.
- QSPL supports processing of spooling readers and writers.
- QSYSWRK supports various system functions, such as TCP/IP.
- QUSRWRK is the user work subsystem. It contains jobs that are started by systems to do work on behalf of a user.
QBASE automatically starts when the server is started. An automatically started job in QBASE starts QSPL.
The second controlling subsystem configuration supplied is more complex. This configuration includes the following subsystems:
- QCTL, the controlling subsystem, supports interactive jobs started at the console.
- QINTER supports interactive jobs started at other workstations.
- QCMN supports communications jobs.
- QBATCH supports batch jobs.
- QSPL supports processing of spooling readers and writers.
- QSYSWRK supports various system functions, such as TCP/IP.
- QUSRWRK is the user work subsystem. It contains jobs that are started by systems to do work on behalf of a user.
If you change your configuration to use the QCTL controlling subsystem, it starts automatically when the system is started. An automatically started job in QCTL starts the other subsystems.
You can change your subsystem configuration from QBASE to QCTL by changing the system value QCTLSBSD (controlling subsystem) to QCTL on the Change System Value (CHGSYSVAL) command and starting the system again.
You can change the IBM-supplied subsystem descriptions or any user-created subsystem descriptions by using the Change Subsystem Description (CHGSBSD) command. You can use this command to change the storage pool size, storage pool activity level, and the maximum number of jobs for the subsystem description of an active subsystem.
Parent topic:
i5/OS work management
Related concepts
Communications Management PDF
Managing work
Related reference
Change Subsystem Description (CHGSBSD) command
Change System Value (CHGSYSVAL) command