STREAMS. HP (Hewlett-Packard) HP 3000

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Command Definitions SP-Z

STREAMS

STREAMS

Enables or disables the STREAMS device. Allows or disallows users to submit job/data streams.

Syntax

STREAMS

{

ldev

OFF }

Parameters

ldev

The logical device number of the STREAMS device. This device must also have an output device number or class that references logical devices of type 32. Any input device, (except the system console or terminals), may be used, providing that it was configured as job-accepting in the SYSGEN dialog.

OFF

Disables the STREAMS facility.

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:

Chapter 8 673