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       hboot - Start LAM on the local node.


       hboot [-dhstvNV] [-c <conf>] [-I <inet_topo>] [-R <rtr_topo>]


       -d              Turn on debugging.  This implies -v.

       -h              Print the command help menu.

       -s              Close stdio of child processes.

       -t              Terminate  (tkill(1))  any  previous LAM session before

       -v              Be verbose.

       -N              Go through the motions but do  not  actually  take  any

       -V              Format and print the process schema.

       -c <conf>       Use <conf> as the process schema.

       -I <inet_topo>  Set the $inet_topo variable in the process schema.

       -R <rtr_topo>   Set the $rtr_topo variable in the process schema.


       Most  MPI  users  will  probably not need to use the hboot command; see

       The hboot tool can be understood  as  a  generic  utility  that  starts
       multiple processes on the local node, based on information in a process
       schema.  It is not restricted to starting  LAM.   It  is  part  of  the
       startup sequence preformed by lamboot(1).

       A process schema is a description of the processes which constitute the
       operating system on a given node.  Naturally, the process  schema  used
       by  hboot  should be the one that describes LAM on a node.  The grammar
       of the process schema is described in conf(5).

       When starting LAM on a remote  machine  using  rsh(1),  the  open  file
       descriptors  of  the processes started by hboot must be closed in order
       for rsh(1) to exit.  This is done by  using  the  -s  option.   The  -t
       option can be used to force a tkill(1) on the machine before attempting
       to start LAM.  This feature is used by lamboot(1) to  handle  the  case
       where  a  user  might  start  a  machine  a  second  time without using
       lamwipe(1) to terminate the previous LAM session.

       The -I and -R options set  their  respective  variables  to  the  given
       values.   The $inet_topo variable is typically used by the LAM Internet
       datalinks that communicate with other nodes.  The $rtr_topo variable is
       passed to the LAM router that handles network and topology information.
       The variables can also be set in the process schema file (see  conf(5))
       but their values are overridden by the command line options.

       When  LAM  is  started, the kernel records all processes that attach to
       it, including all the processes in the process schema.  It is  the  job
       of  tkill(1) to use this information to remove these processes from the


       hboot -v
           Start LAM on the  local  node  with  the  default  process  schema.
           Report about every step as it is done.

       hboot -c myconfig
           Boot the local node with the custom process schema, myconfig.


                                     default   node   process   schema,  where
                                     "laminstalldir" is  the  directory  where
                                     LAM/MPI was installed

                                     Default   location   for  help  file  for
                                     diagnostic  messages   that   hboot   may

       /tmp/lam-$USER@<hostname>     kill  file for the LAM session on machine
                                     <hostname>, where $USER is the userid.


       Using ps(1) after hboot will display, among others, the  LAM  processes
       that have been started.  They may be killed one by one with kill(1), or
       all at once by killing the LAM kernel process with a HUP  signal.   The
       preferred method is to use the LAM tool tkill(1) which should kill them
       all at once, and also remove the kill  file.   New  users  should  make
       liberal  use  of  ps(1)  to  gain confidence that the system is working
       properly.  In a disaster, ps(1) and  kill(1)  are  your  only  hope  of


       lamboot(1), tkill(1), conf(5), lam-helpfile(5)