Page Menu
Home
c4science
Search
Configure Global Search
Log In
Files
F92776664
partition.html
No One
Temporary
Actions
Download File
Edit File
Delete File
View Transforms
Subscribe
Mute Notifications
Award Token
Subscribers
None
File Metadata
Details
File Info
Storage
Attached
Created
Sat, Nov 23, 15:28
Size
2 KB
Mime Type
text/html
Expires
Mon, Nov 25, 15:28 (1 d, 23 h)
Engine
blob
Format
Raw Data
Handle
22510986
Attached To
rLAMMPS lammps
partition.html
View Options
<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 N command ...
</PRE>
<UL><LI>style = <I>yes</I> or <I>no</I>
<LI>N = 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 of processors you have defined via the -partition
command-line switch. See <A HREF = "Section_start.html#start_7">Section_start 6</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>N</I> arguments.
</P>
<P>If the <I>style</I> is <I>yes</I>, the command will be invoked on any partition
which matches the <I>N</I> 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 Np, where Np is the number of
partitions specified by the <A HREF = "Section_start.html#start_7">-partition command-line
switch</A>.
</P>
<P><I>N</I> 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 Np. A leading asterisk means all partitions
from 1 to n (inclusive). A trailing asterisk means all partitions
from n to Np (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>
</P>
<P><A HREF = "run_style.html">run_style verlet/split</A>
</P>
<P><B>Default:</B> none
</P>
</HTML>
Event Timeline
Log In to Comment