conf - LAM node process schema


   Most LAM/MPI used can disregard this page.

   A  process  schema  lists the system processes that will constitute the
   LAM environment on a particular node.  LAM developers will find process
   schemata very useful for debugging and for generating custom systems.

   Separate  default  configurations  files  are normally used for booting
   either the single-daemon version  (conf.lam)  or  the  external-servers
   version (conf.otb).  The single-daemon version is used by default.  The
   external-servers version is  typically  used  by  LAM  developers  when
   debugging  LAM  services.  The -c option to hboot(1) specifies the file
   name of a custom process schema.  This capability is not available with

   Application  programs  can  be  booted  with  the  LAM  environment  by
   including the program name in the process schema.


   The process schema grammar defines three types of statements: comments,
   processes, and options.

   Comments begin with # and terminate with a newline.

   Process  statements  consist of a filename, command line arguments, and
   possibly options local to the process.  The command line arguments  are
   passed to the process when it is started.  The process options are used
   by the booting tools before starting the process.

   Filenames may include  application  programs  and  any  of  the  system
   processes listed below.

   bforward    bufferd helper, forwards remote messages.

   bufferd     creates, kills, sweeps, and states buffers.

   dli_inet    sends data on network connections.

   dlo_inet    receives data from network connections.

   echod       echoes messages; can be used to test nodes and links.

   filed       serves file access.

   flatd       provides symbolic access to node memory.

   iod         handles stdio data of processes.

   kenyad      controls and monitors processes.

   kernel      coordinates message passing.

   lamd        single-daemon  version  of  all  servers excluding ledd and

   ledd        controls LEDs.

   loadd       loads executable files onto nodes.

   mtvd        controls a pixel map display.

   router      maintains routing tables.

   traced      collects and transports trace data.

   Processes are started in the order given in the process schema, and for
   LAM, the order is important.  The kernel must be first.

   Process  options are placed inside braces {} following the command line
   arguments.  Process  options  consist  of  a  keyword  followed  by  an
   assigned  value  in parentheses.  Options that are not explicitly given
   have default settings.  Options inside  braces  in  process  statements
   apply  only  to that process.  Options outside process statements apply
   to all processes that  appear  later  in  the  process  schema,  unless
   locally overridden.  All the options are listed below:

   inet_topo   a  string of dli_inet or lamd options, global only, default

   rtr_topo    a string of router options, global only, default null

   delay       waiting time in seconds after process boot, default 0

   The inet_topo and rtr_topo options can be overridden from  the  command
   line of hboot(1) using the -I and -R options respectively.


   Following  are example process schemata.  The first file is used for an
   OTB node in LAM.

   ## typical LAM process schemata

   lamd $inet_topo

   The second file is used by LAM developers to control each server as  an
   independent process, typically during debugging.

   ## external-servers LAM process schemata

   ## The kernel is listed first.
   kernel $delay

   ## daemons
   dli_inet $inet_topo


       default LAM node process schema, where $LAMHOME is the installation

       example external-servers node process schema  used  when  debugging




Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.