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GNU/Linux |
Debian 6.0.2(Squeeze) |
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nodeset(1) |
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nodeset − compute advanced nodeset operations
nodeset [COMMAND] [OPTIONS] [nodeset1 [−ixX] nodeset2|...]
The nodeset command is an utility command provided with the ClusterShell library which implements some features of the NodeSet and RangeSet classes. It provides easy manipulation of indexed cluster nodes and node groups.
−−version
show program's version number and exit
−h, −−help
show this help message and exit
−s GROUPSOURCE, −−groupsource=GROUPSOURCE
optional groups.conf(5) group source to use
Commands:
−c, −−count
show number of nodes in nodeset(s)
−e, −−expand
expand nodeset(s) to separate nodes
−f, −−fold
fold nodeset(s) (or separate nodes) into one nodeset
−l, −−list
list node groups, followed by corresponding nodes when specified two times (−ll), and also nodes count when specified three times (−lll). See also −s GROUPSOURCE.
−r, −−regroup
fold nodes using node groups (see −s GROUPSOURCE)
−−groupsources
list all configured group sources (see groups.conf(5))
Operations:
−x SUB_NODES, −−exclude=SUB_NODES
exclude specified nodeset
−i AND_NODES, −−intersection=AND_NODES
calculate nodesets intersection
−X XOR_NODES, −−xor=XOR_NODES
calculate symmetric difference between nodesets
Options:
−a, −−all
call external node groups support to display all nodes
−−autostep=AUTOSTEP
auto step threshold number when folding nodesets, if not specified, auto step is disabled. Example: autostep=4, "node2 node4 node6" folds in node[2,4,6] but autostep=3, "node2 node4 node6" folds in node[2−6/2]
−d, −−debug
output more messages for debugging purpose
−q, −−quiet
be quiet, print essential output only
−R, −−rangeset
switch to RangeSet instead of NodeSet. Useful when working on numerical cluster ranges, eg. 1,5,18−31
−G, −−groupbase
hide group source prefix (always @groupname)
−S SEPARATOR, −−separator=SEPARATOR
separator string to use when expanding nodesets (default: ' ')
−I SLICE_RANGESET, −−slice=SLICE_RANGESET
return sliced off result; examples of SLICE_RANGESET are "0" for simple index selection, or "1−9/2,16" for complex rangeset selection
−−split=MAXSPLIT
split result into a number of subsets
For a short explanation of these options, see −h, −−help.
If a single hyphen−minus (−) is given as a nodeset, it will be read from standard input.
The
nodeset command benefits from ClusterShell 1.3
NodeSet basic arithmetic addition. This feature extends
recognized string patterns by supporting operators matching
all Operations seen previously. String patterns are read
from left to right, by proceeding any character operators
accordinately.
Supported character operators
|
, |
indicates that the union of both left and right nodeset should be computed before continuing | ||
|
! |
indicates the difference operation | ||
|
& |
indicates the intersection operation | ||
|
^ |
indicates the symmetric difference (XOR) operation |
Care should be taken to escape these characters as needed when the shell does not interpret them literally.
Examples of use of extended patterns
$ nodeset −f
node[0−7],node[8−10]
node[0−10]
$ nodeset −f node[0−10]!node[8−10]
node[0−7]
$ nodeset −f node[0−10]&node[5−13]
node[5−10]
$ nodeset −f node[0−10]^node[5−13]
node[0−4,11−13]
Example of advanced usage
$ nodeset −f @gpu^@slurm:bigmem!@chassis[1−9/2]
This computes a folded nodeset containing nodes found in group @gpu and @slurm:bigmem, but not in both, minus the nodes found in odd chassis groups from 1 to 9.
An exit status of zero indicates success of the nodeset command. A non−zero exit status indicates failure.
Getting the node count
$ nodeset −c
node[0−7,32−159]
136
$ nodeset −c node[0−7,32−159]
node[160−163]
140
$ nodeset −c @login
4
Folding nodesets
$ nodeset −f
node[0−7,32−159] node[160−163]
node[0−7,32−163]
Expanding nodesets
$ nodeset −e
node[160−163]
node160 node161 node162 node163
Excluding nodes from nodeset
$ nodeset −f
node[32−159] −x node33
node[32,34−159]
Computing nodesets intersection
$ nodeset −f
node[32−159] −i
node[0−7,20−21,32,156−159]
node[32,156−159]
Computing nodesets symmetric difference (xor)
$ nodeset −f
node[33−159] −−xor
node[32−33,156−159]
node[32,34−155]
Command syntax
has been changed since nodeset command available with
ClusterShell v1.1. Operations, like
−−intersection or −x, are
now specified between nodesets in the command line.
ClusterShell v1.1:
$ nodeset −f −x
node[3,5−6,9] node[1−9]
node[1−2,4,7−8]
ClusterShell v1.2+:
$ nodeset −f
node[1−9] −x node[3,5−6,9]
node[1−2,4,7−8]
clush(1), clubak(1), groups.conf(5).
Use the following URL to submit a bug report or feedback:
http://sourceforge.net/apps/trac/clustershell/report
Stephane Thiell, CEA DAM <stephane.thiell@cea.fr>
CeCILL-C V1
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nodeset(1) | |