Provided by: clustershell_1.6-4_all 
NAME
nodeset - compute advanced nodeset operations
SYNOPSIS
nodeset [COMMAND] [OPTIONS] [nodeset1 [-ixX] nodeset2|...]
DESCRIPTION
nodeset is an utility command provided with the ClusterShell library which implements some
features of ClusterShell's NodeSet and RangeSet Python classes. It provides easy
manipulation of indexed cluster nodes and node groups. It is automatically bound to the
library node group resolution mechanism. Thus, nodeset is especially useful to enhance
cluster aware administration shell scripts.
OPTIONS
--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 (see also -S SEPARATOR)
-f, --fold
fold nodeset(s) (or separate nodes) into one nodeset
-l, --list
list node groups, list node groups and nodes (-ll) or list node groups,
nodes and node count (-lll). When no argument is specified at all, this
command will list all node group names found in selected group source
(see also -s GROUPSOURCE). If any nodesets are specified as argument,
this command will find node groups these nodes belongs to (individually).
Optionally for each group, the fraction of these nodes being member of
the group may be displayed (with -ll), and also member count/total group
node count (with -lll). If a single hyphen-minus (-) is given as a
nodeset, it will be read from standard input.
-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
--contiguous
split result into contiguous subsets (ie. for nodeset, subsets will
contain nodes with same pattern name and a contiguous range of indexes,
like foobar[1-100]; for rangeset, subsets with consists in contiguous
index ranges)"""
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.
EXTENDED PATTERNS
The nodeset command benefits from ClusterShell 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.
EXIT STATUS
An exit status of zero indicates success of the nodeset command. A non-zero exit status
indicates failure.
EXAMPLES
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]
$ echo node3 node6 node1 node2 node7 node5 | nodeset -f
node[1-3,5-7]
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]
Splitting nodes into several nodesets (expanding results)
$ nodeset -e --split=3 node[1-9]
node1 node2 node3
node4 node5 node6
node7 node8 node9
Splitting non-contiguous nodesets (folding results)
$ nodeset -f --contiguous node2 node3 node4 node8 node9
node[2-4]
node[8-9]
HISTORY
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]
SEE ALSO
clush(1), clubak(1), groups.conf(5).
BUG REPORTS
Use the following URL to submit a bug report or feedback:
https://github.com/cea-hpc/clustershell/issues
AUTHOR
Stephane Thiell, CEA DAM <stephane.thiell@cea.fr>
COPYRIGHT
CeCILL-C V1