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Special Forums News, Links, Events and Announcements Software Releases - RSS News Streamline 1.8.0.1 (Default branch)
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Old 02-02-2009
Streamline 1.8.0.1 (Default branch)
Streamline is a pipelined I/O subsystem for both kernel and application processing on Linux, with 40+ filters for pattern matching, stream reassembly, compression, etc. It exports the pipes, sockets, and pcap interfaces and uses shared memory to reduce I/O copy and context switch cost. Logical uses are rapid application development of intrusion detection systems and similar complex network processing tasks. License: GNU Lesser General Public License (LGPL) Changes:
This version updates the stream language to be a superset of Unix shell pipelines and improves support for hybrid pipelines consisting of streamline filters (e.g., in the network stack) and full Unix processes. Because of the extensive interface changes, this version is less mature than 1.7.4.5 and has little documentation (other than the mailing list). Image

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LEARN ABOUT HPUX

nstrpush

NSTRPUSH(5)							File Formats Manual						       NSTRPUSH(5)

NAME

       NSTRPUSH - maximum number of STREAMS modules in a single stream

VALUES

   Failsafe
   Default
   Allowed values
   Recommended values
DESCRIPTION

       This  tunable  defines  the maximum number of STREAMS modules that can be pushed onto a stream.	This provides some protection against run-
       away processes that might automatically select modules to push onto a stream.  It is not intended as a defense  against	malicious  use	of
       STREAMS modules by system users.

       Most systems do not require more than about three or four modules in a stream.  However, there may be some unusual cases where more modules
       are needed.  The default value for this tunable allows as many as 16 modules in a stream, which should be  sufficient  for  even  the  most
       demanding installations and applications.

   Who Is Expected to Change This Tunable?
       Any customer.

   Restrictions on Changing
       Changes to this tunable take effect at next reboot.

   When Should the Value of This Tunable Be Raised?
       When the customer needs to push more STREAMS modules in a single stream.

   What Are the Side Effects of Raising the Value of This Tunable?
       Might allow run-away applications to unduly consume system resources.

   When Should the Value of This Tunable Be Lowered?
       There is no need to lower the tunable value from the default value.

   What Are the Side Effects of Lowering the Value of This Tunable?
       Too low of a value might cause network commands to fail.

   What Other Tunable Should Be Changed at the Same Time as This One?
       None.

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 tun-
       able values, consult the documentation for the kernel software being installed.	For information about optional kernel  software  that  was
       factory installed on your system, see at

AUTHOR

       was developed by HP.

							     Tunable Kernel Parameters						       NSTRPUSH(5)