Provided by: lam4-dev_7.1.2-1.3_i386 bug

NAME

       conf - LAM node process schema

DESCRIPTION

       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
       lamboot(1).

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

STRUCTURE AND SYNTAX

       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
                   mtvd.

       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
                   null

       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.

EXAMPLES

       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
       ##
       router
       kenyad
       dli_inet $inet_topo
       dlo_inet
       bufferd
       bforward
       loadd
       echod
       flatd
       filed
       traced
       iod

FILES

       $LAMHOME/etc/lam-conf.lamd
           default LAM node process schema, where $LAMHOME is the installation
           directory

       $LAMHOME/etc/lam-conf.separate
           example external-servers node process schema  used  when  debugging
           LAM

SEE ALSO

       hboot(1)