APPSCHEMA (5)
LAM application schema format
SYNTAX
#
# comments
#
[<nodes>] [-np #] [-s <node>] [-wd <dir>] <program> [<args>]
[<nodes>] [-np #] [-s <node>] [-wd <dir>] <program> [<args>]
\.\.\.
DESCRIPTION
The application schema is an ASCII file containing a description of
the programs which constitute an application. It is used by mpirun(1)
to start an MPI application. All tokens after the program name will
be passed as command line arguments to the new processes. Ordering of
the other elements on the command line is not important.
The meaning of the options is the same as in mpirun(1). Note,
however, that if -wd is used in the application schema file, it will
override any -wd value specified on the command line.
For each program line, processes will be created on LAM nodes
according to the presence of
<nodes>
and the process count option (-np).
only <nodes>
One process is created on each node.
only -np
The specified number of processes are scheduled across all LAM nodes.
both
The specified number of processes are scheduled across the specified nodes.
neither
One process is created on the local node.
By default, LAM searches for executable programs on the target node
where a particular instantiation will run.
If the file system is not shared, the target nodes are homogeneous, and the
program is frequently recompiled, it can be convenient to have LAM
transfer the program from a source node (usually the local node) to
each target node.
The -s option specifies this behaviour and identifies the single
source node.
EXAMPLE
#
# Example application schema
# Note that it may be necessary to specify the entire pathname for
# "master" and "slave" if you get "File not found" errors from
# mpirun(1)
#
n0 master 42.0
N -np 10 -s h slave
SEE ALSO
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