streampipes(5)                                               streampipes(5)
                          Tunable Kernel Parameters



 NAME    [Toc]    [Back]
      streampipes - force all pipes to be STREAMS-based

 VALUES    [Toc]    [Back]
    Failsafe
      0

    Default    [Toc]    [Back]
      0

    Allowed values    [Toc]    [Back]
      0 - 2147483647

    Recommended values    [Toc]    [Back]
      0

 DESCRIPTION    [Toc]    [Back]
      This tunable determines the type of pipe that is created by the pipe()
      system call.  If set to the default value of zero, all pipes created
      by pipe() are normal HP-UX file-system pipes.  If the value is nonzero,
 pipe() creates STREAMS-based pipes, and STREAMS modules can be
      pushed onto the resulting stream.

      If this tunable is set to a non-zero value, the pipemod and pipedev
      module and driver must be configured in file /stand/system.

    Who Is Expected to Change This Tunable?
      Any customer.

    Restrictions on Changing    [Toc]    [Back]
      Changes to this tunable take effect at next reboot.

    When Should the Tunable Be Turned On?
      If the customer uses applications that require STREAMS-based pipes,
      this tunable should be turned on.

    What Are the Side Effects of Turning the Tunable On?
      STREAMS-based pipes performance may differ from normal file system
      pipes.

    When Should the Tunable Be Turned Off?
      If the customer does not need the STREAMS-based pipes, this tunable
      should be turned off.

    What Are the Side Effects of Turning the Tunable Off?
      Applications that try to push STREAMS modules onto the pipe will fail.

    What Other Tunable Should Be Changed at the Same Time as This One?
      If this tunable is set to a non-zero value, the pipemod and pipedev
      module and driver must be configured in the file /stand/system.




 Hewlett-Packard Company            - 1 -      HP-UX 11i Version 2: Sep 2004






 streampipes(5)                                               streampipes(5)
                          Tunable Kernel Parameters



 WARNINGS    [Toc]    [Back]
      All HP-UX kernel tunable parameters are release specific.  This
      parameter may be removed or have its meaning changed in future
      releases of HP-UX.

      Installation of optional kernel software, from HP or other vendors,
      may cause changes to tunable parameter values.  After installation,
      some tunable parameters may no longer be at the default or recommended
      values.  For information about the effects of installation on tunable
      values, consult the documentation for the kernel software being
      installed. For information about optional kernel software that was
      factory installed on your system, see HP-UX Release Notes at
      http://docs.hp.com.

 AUTHOR    [Toc]    [Back]
      streampipes was developed by HP.


 Hewlett-Packard Company            - 2 -      HP-UX 11i Version 2: Sep 2004