Subsystem parameter

If you have a vendor or home-grown subsystem type that has a qualifier other than the IBM® supported ones, it could use the subsystem parameter. You should check your subsystem documentation to determine whether your subsystem supports the subsystem parameter, and in what parameter format.

Because the subsystem parameter is up to 256 characters long, you can nest to use more than the limit of eight characters. See Organizing work for classification for further information on how to nest using the start position.

DB2®

The subsystem parameter, if any, associated with the originator of the query.

DDF

The subsystem parameter. This qualifier has a maximum length of 255 bytes. The first 16 bytes contain the client's user ID. The next 18 bytes contain the client's workstation name. The remaining 221 bytes are reserved.

Note the following:

• If the length of the client's user ID is less than 16 bytes, use blanks after the user ID to pad the length.
• If the length of the client's workstation is less than 18 bytes, use blanks after the workstation name to pad the length.

IWEB

A 47-byte string formatted as follows:

1-8

Subsystem name

9

Blank

10-24

Source IP address

25

Blank

26-40

Target IP address

41

Blank

42-47

Target port

For more information, see Internet Connection Server User's Guide.

MQ

The 32-byte application_environment_name from the APPLICID attribute of the process definition associated with the WLM-managed queue.

SOM

A 246-byte string consisting of two 123-byte fields:

• Field 1 — class name
• Field 2 — method name

For more information, see z/OS® SOMobjects® Configuration and Administration Guide.

STC

Indicates the system-provided service class name that will be assigned if a started task created with the high dispatching priority, privileged, or system task attribute is not assigned to a service class.

Values:

• SYSTEM — Started task was created with high dispatching priority attribute.
• SYSSTC — Started task is privileged or is a system task.
• (blank) — Started task was not created with the high dispatching attribute, is not privileged, and is not a system task.

Note: Subsystem Parameter Groups can be used as a work qualifier for subsystem types DB2, DDF, IWEB, MQ, SOM but not for subsystem type STC. See Using groups for further information.