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RedHat 9 (Linux i386) - man page for lamshrink (redhat section 1)

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       lamshrink - Shrink a LAM multicomputer.

       lamshrink [-hv] [-w <delay>] [-u <userid>] <node> <hostname>

       -h	     Print useful information on this command.

       -v	     Be verbose.

       <hostname>    Remove the LAM node on this host.

       <node>	     Remove the LAM node with this ID.

       -w <delay>    Notify  processes	on  the  doomed node and pause for <delay> seconds before

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

       An existing LAM session, initiated by lamboot(1), can be shrunk to include less nodes with
       lamshrink.   One  node  is removed for each invocation.	At a minimum, the node ID and the
       associated host name is given on the command line.  Once lamshrink completes, the node  ID
       is  invalid  across  the remaining nodes.  If a different userid is required to access the
       host, it is specified with the -u option.

       Existing application processes on the target node can be warned of impending shutdown with
       the  -w option.	A LAM signal (SIGFUSE) will be sent to these processes and lamshrink will
       then pause for the given number of seconds before proceeding with removing the  node.   By
       default, SIGFUSE is ignored.  A different handler can be installed with ksignal(2).

       All  application  processes  on	all remaining nodes are always informed of the death of a
       node.  This is also done with a signal (SIGSHRINK), which by default  causes  a	process's
       runtime route cache to be flushed (to remove any cached information on the dead node).  If
       this signal is re-vectored for the purpose of fault tolerance, the old handler  should  be
       called  at  the	beginning  of  the new handler.  The signal does not, by itself, give the
       process information on which node has been removed.  One technique for getting this infor-
       mation  is  to  query  the router for information on all relevant nodes using getroute(2).
       The dead node will cause this routine to return an error.

       If enabled with lamboot(1), LAM will watch for nodes that fail.	The procedure for  remov-
       ing  a  node that has failed is the same as lamshrink after the warning step.  In particu-
       lar, the SIGSHRINK signal is delivered.

       lamshrink -v newhost n1
	   Remove LAM on newhost, known within LAM as node 1.  Report about  important	steps  as
	   they are done.

       lamshrink newhost n30 -w 10
	   Inform  all	processes on LAM node 30, which is running on newhost, that the node will
	   be dead in 10 seconds.  Wait 10 seconds and remove the node.  Operate silently.

       lamboot(1), tkill(1), ksignal(2), getroute(2)

LAM 6.5.8				  November, 2002			     LAMSHRINK(1)
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