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       procschema - LAM process schema format


       # comment
       <program> [$delay] [$inet_topo] [<arguments>]
       <program> [$delay] [$inet_topo] [<arguments>]


       Most LAM/MPI users can disregard this page.

       A  process  schema (once ambiguously called a configuration file) lists
       the programs that will constitute the LAM environment on  a  particular
       node.  It drives the operation of hboot(1).  LAM system developers will
       find process schemata very useful  for  debugging  and  for  generating
       custom  systems.  By convention these files begin with the prefix conf.

       The default process schema selected by lamboot(1)  (conf.lam)  contains
       only  one program, the LAM daemon (lamd).  A one program process schema
       makes the whole  business  of  process  schemata  and  hboot(1)  rather
       redundant.   LAM can also be run in a de-clustered mode with the daemon
       reduced to a simple local message-passing  server  (the  "kernel")  and
       several system clients for network message-passing and remote services.
       This form of LAM is described in the process schema, conf.otb.

       The syntax is line oriented.  Comments begin with # and terminate  with
       a newline.

       Process  lines  consist  of  a  filename,  command  line arguments, and
       possibly  options  and  substitution  variables.   The   command   line
       arguments  are  passed  to the process when it is started.  The process
       options control  how  the  process  is  started.   Currently  supported
       process options are:

       $delay        After  starting  the  process,  pause before starting the
                     next process.

       Substitution variables are set by the tools that interpret the  process
       schema  and  are  a  way  of  customizing  the process at runtime.  See
       hboot(1).  Currently supported substitution variables are:

       $inet_topo    typically,  command-line  arguments  for   LAM   Internet
                     datalink processes

       $rtr_topo     typically,  command-line  arguments  for  the LAM network
                     information process

       The programs  found  in  the  LAM  de-clustered  mode  process  schema,
       conf.otb, are listed below.

       bufferd     Creates, kills, sweeps, and states buffers.
       bforward    Forward messages; helper for bufferd.
       died        Monitors for death of user processes.
       dli_inet    UDP/IP incoming connection to other nodes
       dlo_inet    UDP/IP outgoing connection to other nodes
       echod       Echoes messages; can be used to test nodes and links.
       filed       Serves file access.
       flatd       Provides symbolic access to node memory.
       kenyad      Controls and monitors processes.
       kernel      Coordinates local message-passing.
       loadd       Loads executable files onto nodes.
       router      Maintains network information.
       traced      Collects and transports trace data.

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


       The de-clustered debug mode LAM process schema is shown below:

       ## The kernel is listed first.
       kernel $delay

       ## daemons
       dli_inet $inet_topo


       $LAMHOME/etc/lam-conf.lamd        default     process     schema    for
                                         lamboot(1),  where  $LAMHOME  is  the
                                         installation directory

       $LAMHOME/etc/lam-conf.separate    default process schema for hboot(1)


       lamboot(1), hboot(1)