STREAMS

Operation Notes

The operator executes this command after a startup to enable the STREAM facility. The STREAMS device must be enabled each time the system is brought back online in order to allow users to stream jobs. (Streamed jobs are processed separately by MPE/iX, allowing users to continue with other work at their terminal. If the streamed job is submitted on a tape drive rather than from a terminal, MPE/iX processes it without requiring the user's attention.) Any attempt to stream a job when the STREAMS facility is disabled generates the following message:

STREAM FACILITY NOT ENABLED: SEE OPERATOR. (CIERR 82)

The device normally configured as the STREAMS device is LDEV 10. However, LDEV 10 may not correspond to an actual device, such as a tape drive, physically connected to the computer. If this is the case, then the STREAMS device is considered a "pseudo-device." Regardless of whether the device physically exists or not, it must be entered into the I/O configuration table as a legitimate logical device. It must be assigned the device class JOBTAPE.

Use

This command may be issued from a session, job, program, or in BREAK. Pressing Break has no effect on this command. It may be issued only from the console unless distributed to users with the ALLOW command.

Examples

To enable jobs and data streams on logical device number 10, enter:

STREAMS 10

To disable data streams, enter:

STREAMS OFF