Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

lamgrow(1)


NAME

   lamgrow - Extend a LAM multicomputer.

SYNOPSIS

   lamgrow  [-hvd]  [-cpu num] [-n nodeid] [-no-schedule] [-ssi key value]
          hostname

OPTIONS

   -cpu num      Indicate how many CPUs are available to LAM  on  the  new
                 node.

   -d            Turn on debugging output.  This implies -v.

   -h            Print useful information on this command.

   -n nodeid     Assign this ID to the new node.

   -no-schedule  Indicate  that  C  and  N expansion in mpirun and lamexec
                 should not schedule on this node.

   -ssi key value
                 Send arguments to various SSI  modules.   See  the  "SSI"
                 section, below.

   -v            Be verbose.

   hostname      Extend LAM with this host.

DESCRIPTION

   An  existing  LAM universe, initiated by lamboot(1), can be enlarged to
   include more nodes with lamgrow.   One  new  node  is  added  for  each
   invocation.   At a minimum, the host name that will run the new node is
   given on the command line.  If a different userid is required to access
   the  host,  it  is specified with the appropriate boot SSI options (see
   lamssi_boot(7)).

   The new node can be assigned any unused, non-negative  identifier.   If
   no  identifier is specified, the highest node identifier in the current
   LAM universe plus one is used.  Note  that  lamboot(1)  always  assigns
   node identifiers consecutively from 0.

   lamgrow  can  be  run  from  any  node  in  the  current  LAM universe.
   Specifically -- it cannot be run  from  the  intended  new  host.   Two
   invocations  of  lamgrow  should  not run concurrently, and the command
   attempts to detect this situation. The name of the  host  specified  in
   lamgrow  should  not  be the one which is already present in the user's
   LAM universe and the command attempts to detect this situation too.

   Resource managers will be the most common user of lamgrow.  When  hosts
   become idle and a user has expressed a desire to the manager that extra
   cycles should be exploited, the manager could invoke lamgrow  and  then
   launch the specified application process(es) on the new node.

EXAMPLES

   lamgrow -v newhost
       Start  LAM  on  newhost  and  add  it to the existing LAM universe.
       Choose  the  next  available  node  identifier  and  report   about
       important steps as they are done.

   lamgrow -n 30 newhost
       Start LAM on newhost with node ID 30 and add it to the existing LAM
       universe.  Operate silently.

FILES

   laminstalldir/etc/lam-conf.lamd   default configuration  file  for  LAM
                                     nodes,  where  "laminstalldir" is the
                                     directory    where    LAM/MPI     was
                                     installed.

BUGS

   It is not currently possible to specify a configuration file other than
   lam-conf.lamd on the remote node, even though  this  is  possible  with
   lamboot.

SEE ALSO

   lamboot(1),   lamhalt(1),  hboot(1),  lamwipe(1),  tkill(1),  bhost(5),
   conf(5), lamssi_boot(7)



Opportunity


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.



Education


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.


birds banner