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introu(1) [redhat man page]

INTROU(1)							   LAM COMMANDS 							 INTROU(1)

NAME
introu - introduction to LAM user interface commands LIST OF COMMANDS
Name Appears Description on Page bfctl bfctl.1 Control message buffers (optional). bfstate bfstate.1 Get message buffer status (optional). doom doom.1 Deliver a signal (optional). fctl fctl.1 Control remote file access (optional). fstate fstate.1 Get remote file status (optional). hboot hboot.1 Start LAM on a local node. mpicc mpicc.1 Compile LAM C programs. mpiCC mpicc.1 Compile LAM C++ programs. mpif77 mpif77.1 Compile LAM F77 programs. lamboot lamboot.1 Start LAM. lamclean lamclean.1 Clean all nodes. lamexec lamexec.1 Run non-MPI programs. lamgrow lamgrow.1 Add a node. lamhalt lamhalt.1 Terminate LAM. lamshrink lamshrink.1 Remove a node. lamtrace lamtrace.1 Unload trace data. loadgo loadgo.1 Execute program (optional). mpimsg mpimsg.1 Display MPI buffered messages. mpirun mpirun.1 Run an MPI application. mpitask mpitask.1 Display MPI processes. recon recon.1 Verify LAM setup. state state.1 Get process status (optional). sweep bfctl.1 Clean out message buffers (optional). tkill tkill.1 Terminate local node LAM session. tping tping.1 Echo messages to a node. wipe wipe.1 Terminate LAM (deprecated; use lamhalt). Node Specification Target nodes are given on the command line. Nodes are generically identified as n<list>, where <list> can be a single node identifier or a list of node identifiers. For example: n1 n1,3,5-10 Additionally, c<list> can be used to list specific CPUs on a given machine (lamboot(1) is used to specify how many CPUs LAM may use on each node). Node/CPU identifiers are established in the boot schema (see bhost(5)), and can be written in decimal or hexadecimal notation. In addition to explicit node identification, LAM has special mnemonics that refer to special nodes or a group of nodes. h the local node where the command is typed (as in "here") o the origin node where LAM was started with lamboot(1) N all nodes C all CPUs Process Specification LAM processes can be specified in two ways: by process identifier from the underlying operating system or by LAM process index. PIDs are written as p<list>, where <list> can be a single PID or a list of PIDs. Process indices are written as i<list>, where <list> can be a sin- gle index or a list of indices. LAM 6.5.8 November, 2002 INTROU(1)

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LAMHALT(1)							     LAM TOOLS								LAMHALT(1)

NAME
lamhalt - Shutdown the LAM/MPI run-time environment. SYNOPSIS
lamhalt [-dhHv] OPTIONS
-d Turn on debugging mode. This implies -v. -h Print the command help menu. -i Return immediately (even before the LAM universe is fully halted); deprecated -H Suppress printing the header message. -v Be verbose. DESCRIPTION
The lamhalt tool terminates the LAM software on each of the nodes that were initially booted with lamboot and/or lamgrow. No additional command line arguments are necessary - lamhalt simply sends a message to each remote node telling it to shut down. Each remote node invokes tkill(1) locally to shut down. See tkill(1) for a description of how LAM is terminated on each node. lamhalt may fail if one of the remote nodes has failed, and does not respond to lamhalt's queries. In this case, the lamwipe(1) command should be used to shut down LAM/MPI. If lamwipe(1) fails, the user can manually invoke tkill(1) on the troubled node. In extreme cases, the user may have to terminate individual LAM processes with kill(1). Older versions of lamhalt would return 1-3 seconds before the entire LAM universe was shut down. This caused problems for some LAM users, particularly those who had scripts that invoked lamboot immediately after lamhalt. lamhalt has therefore been changed to wait until the entire LAM universe is down before exiting. This makes the execution of lamhalt take a few seconds (typically less than 5). For users who want the old lamhalt behavior, use the -i (or "immediate") switch, which will cause lamhalt to return immediately, likely before the entire LAM universe has been taken down. EXAMPLES
lamhalt -d Shutdown LAM on the machines and be verbose about its actions. SEE ALSO
recon(1), lamboot(1), tkill(1), bhost(5), lam-helpfile(5), lamwipe(1) LAM 7.1.4 July, 2007 LAMHALT(1)
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