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For Loop to execute a command on a series of files
Post 302372374 by Gussifinknottle on Tuesday 17th of November 2009 08:29:20 PM
11-17-2009
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LEARN ABOUT CENTOS
trace-cmd-split
TRACE-CMD-SPLIT(1) TRACE-CMD-SPLIT(1) NAME
trace-cmd-split - split a trace.dat file into smaller files SYNOPSIS
trace-cmd split [OPTIONS] [start-time [end-time]] DESCRIPTION
The trace-cmd(1) split is used to break up a trace.dat into small files. The start-time specifies where the new file will start at. Using trace-cmd-report(1) and copying the time stamp given at a particular event, can be used as input for either start-time or end-time. The split will stop creating files when it reaches an event after end-time. If only the end-time is needed, use 0.0 as the start-time. If start-time is left out, then the split will start at the beginning of the file. If end-time is left out, then split will continue to the end unless it meets one of the requirements specified by the options. OPTIONS
-i file If this option is not specified, then the split command will look for the file named trace.dat. This options will allow the reading of another file other than trace.dat. -o file By default, the split command will use the input file name as a basis of where to write the split files. The output file will be the input file with an attached '.#' to the end: trace.dat.1, trace.dat.2, etc. This option will change the name of the base file used. -o file will create file.1, file.2, etc. -s seconds This specifies how many seconds should be recorded before the new file should stop. -m milliseconds This specifies how many milliseconds should be recorded before the new file should stop. -u microseconds This specifies how many microseconds should be recorded before the new file should stop. -e events This specifies how many events should be recorded before the new file should stop. -p pages This specifies the number of pages that should be recorded before the new file should stop. Note: only one of *-p*, *-e*, *-u*, *-m*, *-s* may be specified at a time. If *-p* is specified, then *-c* is automatically set. -r This option causes the break up to repeat until end-time is reached (or end of the input if end-time is not specified). trace-cmd split -r -e 10000 This will break up trace.dat into several smaller files, each with at most 10,000 events in it. -c This option causes the above break up to be per CPU. trace-cmd split -c -p 10 This will create a file that has 10 pages per each CPU from the input. SEE ALSO
trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1), trace-cmd-stop(1), trace-cmd-extract(1), trace-cmd-reset(1), trace-cmd-list(1), trace-cmd-listen(1) AUTHOR
Written by Steven Rostedt, <rostedt@goodmis.org[1]> RESOURCES
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git COPYING
Copyright (C) 2010 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL). NOTES
1. rostedt@goodmis.org mailto:rostedt@goodmis.org 06/11/2014 TRACE-CMD-SPLIT(1)