forked from lijiext/lammps
79 lines
2.8 KiB
HTML
79 lines
2.8 KiB
HTML
<HTML>
|
|
<CENTER><A HREF = "http://lammps.sandia.gov">LAMMPS WWW Site</A> - <A HREF = "Manual.html">LAMMPS Documentation</A> - <A HREF = "Section_commands.html#comm">LAMMPS Commands</A>
|
|
</CENTER>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<HR>
|
|
|
|
<H3>partition command
|
|
</H3>
|
|
<P><B>Syntax:</B>
|
|
</P>
|
|
<PRE>partition style Np command ...
|
|
</PRE>
|
|
<UL><LI>style = <I>yes</I> or <I>no</I>
|
|
<LI>Np = partition number (see asterisk form below)
|
|
<LI>command = any LAMMPS command
|
|
</UL>
|
|
<P><B>Examples:</B>
|
|
</P>
|
|
<PRE>partition yes 1 processors 4 10 6
|
|
partition no 5 print "Active partition"
|
|
partition yes *5 fix all nve
|
|
partition yes 6* fix all nvt temp 1.0 1.0 0.1
|
|
</PRE>
|
|
<P><B>Description:</B>
|
|
</P>
|
|
<P>This command invokes the specified command on a subset of the
|
|
partitions you have defined via the -partition command-line switch.
|
|
See <A HREF = "Section_start.html#start_6">this section</A> for an explanation of
|
|
the switch.
|
|
</P>
|
|
<P>Normally, every input script command in your script is invoked by
|
|
every partition. This behavior can be modified by defining world- or
|
|
universe-style <A HREF = "variable.html">variables</A> that have different values
|
|
for each partition. This mechanism can be used to cause your script
|
|
to jump to different input script files on different partitions, if
|
|
such a variable is used in a <A HREF = "jump.html">jump</A> command.
|
|
</P>
|
|
<P>The "partition" command is another mechanism for having as input
|
|
script operate differently on different partitions. It is basically a
|
|
prefix on any LAMMPS command. The commmand will only be invoked on
|
|
the partition(s) specified by the <I>style</I> and <I>Np</I> arguments.
|
|
</P>
|
|
<P>If the <I>style</I> is <I>yes</I>, the command will be invoked on any
|
|
partition which matches the Np argument. If the <I>style</I> is <I>no</I>
|
|
the command will be invoked on all the partitions which do not
|
|
match the Np argument.
|
|
</P>
|
|
<P>Partitions are numbered from 1 to N, where N is the number of
|
|
partitions specified by the <A HREF = "Section_start.html#start_6">-partition command-line
|
|
switch</A>.
|
|
</P>
|
|
<P>Np can be specified in one of two ways. An explicit numeric value can
|
|
be used, as in the 1st example above. Or a wild-card asterisk can be
|
|
used to span a range of partition numbers. This takes the form "*" or
|
|
"*n" or "n*" or "m*n". An asterisk with no numeric values means all
|
|
partitions from 1 to N. A leading asterisk means all partitions from
|
|
1 to n (inclusive). A trailing asterisk means all partitions from n
|
|
to N (inclusive). A middle asterisk means all partitions from m to n
|
|
(inclusive).
|
|
</P>
|
|
<P>This command can be useful for the "run_style verlet/split" command
|
|
which imposed requirements on how the <A HREF = "processors.html">processors</A>
|
|
command lays out a 3d grid of processors in each of 2 partitions.
|
|
</P>
|
|
<P><B>Restrictions:</B> none
|
|
</P>
|
|
<P><B>Related commands:</B> none
|
|
</P>
|
|
<P><A HREF = "run_style.html">run_style verlet/split</A>
|
|
</P>
|
|
<P><B>Default:</B> none
|
|
</P>
|
|
</HTML>
|