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PT-FIFO-SPLIT(1)      User Contributed Perl Documentation     PT-FIFO-SPLIT(1)

NAME
       pt-fifo-split - Split files and pipe lines to a fifo without really
       splitting.

SYNOPSIS
       Usage: pt-fifo-split [OPTIONS] [FILE]

       pt-fifo-split splits FILE and pipes lines to a fifo.  With no FILE, or
       when FILE is -, read standard input.

       Read hugefile.txt in chunks of a	million	lines without physically
       splitting it:

	pt-fifo-split --lines 1000000 hugefile.txt
	while [	-e /tmp/pt-fifo-split ]; do cat	/tmp/pt-fifo-split; done

RISKS
       Percona Toolkit is mature, proven in the	real world, and	well tested,
       but all database	tools can pose a risk to the system and	the database
       server.	Before using this tool,	please:

       o   Read	the tool's documentation

       o   Review the tool's known "BUGS"

       o   Test	the tool on a non-production server

       o   Backup your production server and verify the	backups

DESCRIPTION
       pt-fifo-split lets you read from	a file as though it contains only some
       of the lines in the file.  When you read	from it	again, it contains the
       next set	of lines; when you have	gone all the way through it, the file
       disappears.  This works only on Unix-like operating systems.

       You can specify multiple	files on the command line.  If you don't
       specify any, or if you use the special filename "-", lines are read
       from standard input.

OPTIONS
       This tool accepts additional command-line arguments.  Refer to the
       "SYNOPSIS" and usage information	for details.

       --config
	   type: Array

	   Read	this comma-separated list of config files; if specified, this
	   must	be the first option on the command line.

       --fifo
	   type: string; default: /tmp/pt-fifo-split

	   The name of the fifo	from which the lines can be read.

       --force
	   Remove the fifo if it exists	already, then create it	again.

       --help
	   Show	help and exit.

       --lines
	   type: int; default: 1000

	   The number of lines to read in each chunk.

       --offset
	   type: int; default: 0

	   Begin at the	Nth line.  If the argument is 0, all lines are printed
	   to the fifo.	 If 1, then beginning at the first line, lines are
	   printed (exactly the	same as	0).  If	2, the first line is skipped,
	   and the 2nd and subsequent lines are	printed	to the fifo.

       --pid
	   type: string

	   Create the given PID	file.  The tool	won't start if the PID file
	   already exists and the PID it contains is different than the
	   current PID.	 However, if the PID file exists and the PID it
	   contains is no longer running, the tool will	overwrite the PID file
	   with	the current PID.  The PID file is removed automatically	when
	   the tool exits.

       --statistics
	   Print out statistics	between	chunks.	 The statistics	are the	number
	   of chunks, the number of lines, elapsed time, and lines per second
	   overall and during the last chunk.

       --version
	   Show	version	and exit.

ENVIRONMENT
       The environment variable	"PTDEBUG" enables verbose debugging output to
       STDERR.	To enable debugging and	capture	all output to a	file, run the
       tool like:

	  PTDEBUG=1 pt-fifo-split ... >	FILE 2>&1

       Be careful: debugging output is voluminous and can generate several
       megabytes of output.

SYSTEM REQUIREMENTS
       You need	Perl, DBI, DBD::mysql, and some	core packages that ought to be
       installed in any	reasonably new version of Perl.

BUGS
       For a list of known bugs, see
       <http://www.percona.com/bugs/pt-fifo-split>.

       Please report bugs at <https://jira.percona.com/projects/PT>.  Include
       the following information in your bug report:

       o   Complete command-line used to run the tool

       o   Tool	"--version"

       o   MySQL version of all	servers	involved

       o   Output from the tool	including STDERR

       o   Input files (log/dump/config	files, etc.)

       If possible, include debugging output by	running	the tool with
       "PTDEBUG"; see "ENVIRONMENT".

DOWNLOADING
       Visit <http://www.percona.com/software/percona-toolkit/>	to download
       the latest release of Percona Toolkit.  Or, get the latest release from
       the command line:

	  wget percona.com/get/percona-toolkit.tar.gz

	  wget percona.com/get/percona-toolkit.rpm

	  wget percona.com/get/percona-toolkit.deb

       You can also get	individual tools from the latest release:

	  wget percona.com/get/TOOL

       Replace "TOOL" with the name of any tool.

AUTHORS
       Baron Schwartz

ABOUT PERCONA TOOLKIT
       This tool is part of Percona Toolkit, a collection of advanced command-
       line tools for MySQL developed by Percona.  Percona Toolkit was forked
       from two	projects in June, 2011:	Maatkit	and Aspersa.  Those projects
       were created by Baron Schwartz and primarily developed by him and
       Daniel Nichter.	Visit <http://www.percona.com/software/> to learn
       about other free, open-source software from Percona.

COPYRIGHT, LICENSE, AND	WARRANTY
       This program is copyright 2011-2018 Percona LLC and/or its affiliates,
       2007-2011 Baron Schwartz.

       THIS PROGRAM IS PROVIDED	"AS IS"	AND WITHOUT ANY	EXPRESS	OR IMPLIED
       WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
       MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

       This program is free software; you can redistribute it and/or modify it
       under the terms of the GNU General Public License as published by the
       Free Software Foundation, version 2; OR the Perl	Artistic License.  On
       UNIX and	similar	systems, you can issue `man perlgpl' or	`man
       perlartistic' to	read these licenses.

       You should have received	a copy of the GNU General Public License along
       with this program; if not, write	to the Free Software Foundation, Inc.,
       59 Temple Place,	Suite 330, Boston, MA  02111-1307  USA.

VERSION
       pt-fifo-split 3.2.0

perl v5.32.1			  2020-04-23		      PT-FIFO-SPLIT(1)

NAME | SYNOPSIS | RISKS | DESCRIPTION | OPTIONS | ENVIRONMENT | SYSTEM REQUIREMENTS | BUGS | DOWNLOADING | AUTHORS | ABOUT PERCONA TOOLKIT | COPYRIGHT, LICENSE, AND WARRANTY | VERSION

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