NAME
streampipes — force all pipes to be STREAMS-based
VALUES
Allowed values
0 - 2147483647
DESCRIPTION
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 non-zero,
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
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.
WARNINGS
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
streampipes
was developed by HP.
