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       lamwipe - Shutdown LAM.


       lamwipe   [-b]   [-d]   [-h]   [-v]   [-nn]  [-np]  [-n  <#>]  [-prefix
              </lam/install/path>]       [-prefix        </lam/install/path/>]
              [-sessionprefix      <value>]      [-sessionsuffix      <value>]
              [-withlamprefixpath <value>] [-ssi <key> <value>] [<bhost>]


       -b          Assume local and remote shell are  the  same.   This  means
                   that only one remote shell invocation is used to each node.
                   If -b is not used, two remote shell invocations are used to
                   each node.

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

       -h          Print the command help menu.

       -n <#>      Lamwipe only the first <#> nodes.

       -prefix     Use the LAM installation specified in </lam/install/path/>

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

       -v          Be verbose.

       -nn         Don't add "-n" to the remote agent command line

       -np         Do not force the  execution  of  $HOME/.profile  on  remote

       -session-prefix <value>
                   Set  the session prefix, overriding LAM_MPI_SESSION_PREFIX.

       -session-suffix <value>
                   Set the session suffix, overriding  LAM_MPI_SESSION_SUFFIX.

       -withlamprefixpath <value>
                   Override  the internal installation path.  For internal use
                   only, do not use unless you know what you are doing.


       This command has been deprecated  in  favor  of  the  lamhalt  command.
       lamwipe  should  only  be  necessary  if lamhalt fails and is unable to
       clean up the LAM  run-time  environment  properly.   The  lamwipe  tool
       terminates  the  LAM  software on each of the machines specified in the
       boot schema, <bhost>.  lamwipe is the topology tool that terminates LAM
       on  the  UNIX(tm) nodes of a multicomputer system.  It invokes tkill(1)
       on each machine.   See  tkill(1)  for  a  description  of  how  LAM  is
       terminated on each node.

       The  <bhost> file is a LAM boot schema written in the host file syntax.
       CPU counts in the boot schema are ignored by  lamwipe.   See  bhost(5).
       Instead  of  the  command  line,  a boot schema can be specified in the
       LAMBHOST environment variable.  Otherwise a default file, bhost.def, is
       used.   LAM  searches for <bhost> first in the local directory and then
       in the installation directory under etc/.

       lamwipe does not quit if a particular remote node cannot be reached  or
       if tkill(1) fails on any node.  A message is printed if either of these
       failures occur, in which case the user should investigate the cause  of
       failure and, if necessary, terminate LAM by manually executing tkill(1)
       on the problem node(s).   In  extreme  cases,  the  user  may  have  to
       terminate individual LAM processes with kill(1).

       lamwipe will terminate after a limited number of nodes if the -n option
       is given.  This is mainly intended for use by lamboot(1), which invokes
       lamwipe when a boot does not successfully complete.

   SSI (System Services Interface)
       The  -ssi  switch  allows  the  passing  of  parameters  to various SSI
       modules.  LAM's SSI modules are described in detail in lamssi(7).   SSI
       modules  have  direct impact on MPI programs because they allow tunable
       parameters to be set at run time (such as which boot device  driver  to
       use, what parameters to pass to that driver, etc.).

       The  -ssi  switch  takes  two  arguments: <key> and <value>.  The <key>
       argument generally specifies which SSI module will receive  the  value.
       For  example,  the  <key> "boot" is used to select which RPI to be used
       for starting processes on remote nodes.  The <value>  argument  is  the
       value that is passed.  For example:

       lamboot -ssi boot tm
           Tells  LAM  to  use  the  "tm"  boot module for native launching in
           PBSPro / OpenPBS environments (the tm boot module does not  require
           a boot schema).

       lamboot -ssi boot rsh -ssi rsh_agent "ssh -x" boot_file
           Tells LAM to use the "rsh" boot module, and tells the rsh module to
           use "ssh -x" as the specific agent to launch executables on  remote

       And so on.  LAM's boot SSI modules are described in lamssi_boot(7).

       The  -ssi  switch can be used multiple times to specify different <key>
       and/or <value> arguments.  If the same <key>  is  specified  more  than
       once, the <value>s are concatenated with a comma (",") separating them.

       Note that the -ssi switch is simply a shortcut for setting  environment
       variables.    The   same   effect   may   be  accomplished  by  setting
       corresponding environment variables before running lamwipe.   The  form
       of     the     environment     variables    that    LAM    sets    are:

       Note that the -ssi switch  overrides  any  previously  set  environment
       variables.   Also  note  that  unknown <key> arguments are still set as
       environment  variable  --  they  are  not  checked  (by  lamwipe)   for
       correctness.   Illegal or incorrect <value> arguments may or may not be
       reported -- it depends on the specific SSI module.

   Remote Executable Invocation
       All tweakable aspects of launching executables on remote  nodes  during
       lamwipe  are discussed in lamssi(7) and lamssi_boot(7).  Topics include
       (but are not limited to): discovery of remote shell, run-time overrides
       of the agent use to launch remote executables (e.g., rsh and ssh), etc.


       lamwipe -v mynodes
           Shutdown LAM on the machines described in the boot schema, mynodes.
           Report about important steps as they are done.


       laminstalldir/etc/lam-bhost.def   default   boot   schema  file,  where
                                         "laminstalldir"  is   the   directory
                                         where LAM/MPI was installed.


       recon(1),  lamboot(1),  tkill(1), bhost(5), lam-helpfile(5), lamssi(7),