NODESET(1) ClusterShell User Manual NODESET(1)
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). Option-
ally 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 stan-
dard 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 range-
set 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 sup-
porting operators matching all Operations seen previously. String patterns are read from left to right, by proceeding any character opera-
tors 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
1.6 2012-03-31 NODESET(1)