LAMGROW(1)							   LAM COMMANDS 							LAMGROW(1)

NAME

       lamgrow - Extend a LAM multicomputer.

SYNTAX

       lamgrow [-hv] [-c <bhost>] [-u <userid>] [<node>] <hostname>

OPTIONS

       -h	     Print useful information on this command.

       -c <bhost>    Update this boot schema.

       -v	     Be verbose.

       <hostname>    Extend LAM with this host.

       <node>	     Assign this ID to the new node.

       -u <userid>   Use this userid to access the new host.

DESCRIPTION

       An existing LAM session, initiated by lamboot(1), can be enlarged to include more nodes with lamgrow.  One new node is added for each invo-
       cation.	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 -u option.

       It  can be useful to update the original boot schema used by lamboot(1) with the new node added by lamgrow.  The -c option specifies a boot
       schema filename and causes lamgrow to append the host name.  The updated boot schema is ready to be used by wipe(1) to  terminate  the  ex-
       tended  LAM session.  New nodes added by lamgrow will not be cleaned up by wipe(1) if the original boot schema is used.	They can be termi-
       nated individually, as always, with tkill(1).

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

       lamgrow	can be run from any node.  As a LAM command program it must be run from a node in the existing LAM session.  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.  There is
       no  protection  against specifying the name of host that is already part of the user's existing LAM session.  This is not the proper use of
       lamgrow.

       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 session.  Choose the next available node identifier and report about important
	   steps as they are done.

       lamgrow n30 newhost
	   Start LAM on newhost with node ID 30 and add it to the existing LAM session.  Operate silently.

FILES

       $LAMHOME/etc/lam-conf.lam	 default configuration file for LAM nodes

SEE ALSO

       lamboot(1), hboot(1), wipe(1), tkill(1), bhost(5), conf(5)

LAM 6.5.8							  November, 2002							LAMGROW(1)