Man page for mk-checksum-filter

August 24, 2007 – 5:36 pm

MK-CHECKSUM-FILTER

Section: User Contributed Perl Documentation (1)
Updated: 2008-06-01
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NAME

mk-checksum-filter - Filter checksums from mk-table-checksum.

SYNOPSIS

mk-checksum-filter checksums.txt
mk-table-checksum host1 host2 | mk-checksum-filter
mk-checksum-filter db1-checksums.txt db2-checksums.txt –ignoredb

OVERVIEW

This program takes the unsorted, verbose output from mk-table-checksum and
sorts it, then filters it so you only see lines that have different checksums
or counts.

You can pipe input directly into it from mk-table-checksum, or you can
save the mk-table-checksum’s output and run mk-checksum-filter on the
resulting file(s). If you run it against just one file, or pipe output
directly into it, it’ll output results during processing. Processing multiple
files is slightly more expensive, and you won’t see any output until they’re
all read.

DOWNLOADING

You can download Maatkit from the Sourceforge website at
<http://sourceforge.net/projects/maatkit>, or you can get any of the tools
easily with a command like the following:

wget http://www.maatkit.org/get/toolname
or
wget http://www.maatkit.org/trunk/toolname

Where "toolname" can be replaced with the name (or fragment of a name) of any
of the Maatkit tools. Once downloaded, they’re ready to run; no installation is
needed. The first URL gets the latest released version of the tool, and the
second gets the latest trunk code from Subversion.

OPTIONS

–ignoredb and –equaldbs are mutually exclusive.

–equaldbs

short form: -d; type: Hash

This comma-separated list of databases are equal.

These database names is always considered to have the same tables. In other
words, this makes "database1.table1.chunk1" equal to "database2.table1.chunk1"
if they have the same checksum.

This disables incremental processing, so you won’t see any results until all
input is processed.

–header

short form: -h

Preserves headers output by mk-table-checksum.

–ignoredb

short form: -i

Ignore the database name when comparing lines.

This disables incremental processing, so you won’t see any results until all
input is processed.

–master

short form: -m; type: string

The name of the master server.

Specifies which host is the replication master, and sorts lines for that host
first, so you can see the checksum values on the master server before the
slave.

–unique

short form: -u; type: string

Show unique differing host/db/table names.

The argument must be one of host, db, or table.

–verbose

short form: -v

Output all lines, even those that have no differences, except for header lines.

EXIT STATUS

Exit status is 0 if no differences were found, 1 if any were.

ENVIRONMENT

The environment variable "MKDEBUG" enables verbose debugging output in all of
the Maatkit tools:



   MKDEBUG=1 mk-….

BUGS

Please use the Sourceforge bug tracker, forums, and mailing lists to request
support or report bugs: <http://sourceforge.net/projects/maatkit/>.

Please include the complete command-line used to reproduce the problem you are
seeing, the version of all MySQL servers involved, the complete output of the
tool when run with “–version”, and if possible, debugging output produced by
running with the "MKDEBUG=1" environment variable.

AUTHOR

Baron “Xaprb” Schwartz.

COPYRIGHT, LICENSE AND WARRANTY

This program is copyright (c) 2007 Baron Schwartz.
Feedback and improvements are welcome.

THIS PROGRAM IS PROVIDED “AS IS” AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTIBILITY 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

This manual page documents Ver 1.1.27 Distrib 1972 $Revision: 1970 $.

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