clubak (1) Linux Manual Page

NAME

clubak – format output from clush/pdsh-like output and more

SYNOPSIS

clubak [ OPTIONS ]

DESCRIPTION

clubak formats text from standard input containing lines of the form "node:output". It is fully backward compatible with dshbak(1) but provides additional features. For instance, clubak always displays its results sorted by node/nodeset.

You do not need to use clubak when using clush(1) as all output formatting features are already included in. It is provided for other usages, like post-processing results of the form "node:output".

Like clush(1), clubak uses the ClusterShell.MsgTree module of the ClusterShell library (see pydoc ClusterShell.MsgTree).

INVOCATION

clubak should be started with connected standard input.

OPTIONS

–version

show clubak version number and exit

-b, -c

gather nodes with same output (-c is provided for dshbak(1) compatibility)

-d, –debug

output more messages for debugging purpose

-L

disable header block and order output by nodes

-r, –regroup

fold nodeset using node groups

-s GROUPSOURCE, –groupsource=GROUPSOURCE

optional groups.conf(5) group source to use

-G, –groupbase

do not display group source prefix (always @groupname)

-S SEPARATOR, –separator=SEPARATOR

node / line content separator string (default: :)

-F, –fast

faster but memory hungry mode (preload all messages per node)

-T, –tree

message tree trace mode; switch to enable ClusterShell.MsgTree trace mode, all keys/nodes being kept for each message element of the tree, thus allowing special output gathering

–color=WHENCOLOR

whether to use ANSI colors to surround node or nodeset prefix/header with escape sequences to display them in color on the terminal. WHENCOLOR is never, always or auto (which use color if standard output refers to a terminal). Color is set to [34m (blue foreground text) and cannot be modified.

–diff

show diff between gathered outputs

EXIT STATUS

An exit status of zero indicates success of the clubak command.

EXAMPLES

1.

clubak can be used to gather some recorded clush(1) results:

Record clush(1) results in a file:

#clush - w node[1 - 7] uname - r> / tmp / clush_output
#clush - w node[32 - 159] uname - r>> / tmp / clush_output

Display file gathered results (in line-mode):

# clubak -bL </tmp/clush_output

2.

Another example, iterate over node* text files in current directory and gather characters count for all of them:

#find - name "node*" - exec wc - c{}; | awk '{ gsub("./","",$2); print $2": "$1 }' | clubak - bL
node[1, 3] : 7 node2 : 9

SEE ALSO

clush(1), nodeset(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 <sthiell [at] stanford.edu>

COPYRIGHT

GNU Lesser General Public License version 2.1 or later (LGPLv2.1+)

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