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INNOCHECKSUM(1)		     MySQL Database System	       INNOCHECKSUM(1)

NAME
       innochecksum - offline InnoDB file checksum utility

SYNOPSIS
       innochecksum [options] file_name

DESCRIPTION
       innochecksum prints checksums for InnoDB	files. This tool reads an
       InnoDB tablespace file, calculates the checksum for each	page, compares
       the calculated checksum to the stored checksum, and reports mismatches,
       which indicate damaged pages. It	was originally developed to speed up
       verifying the integrity of tablespace files after power outages but can
       also be used after file copies. Because checksum	mismatches will	cause
       InnoDB to deliberately shut down	a running server, it can be preferable
       to use this tool	rather than waiting for	a server in production usage
       to encounter the	damaged	pages.

       innochecksum cannot be used on tablespace files that the	server already
       has open. For such files, you should use	CHECK TABLE to check tables
       within the tablespace.

       If checksum mismatches are found, you would normally restore the
       tablespace from backup or start the server and attempt to use mysqldump
       to make a backup	of the tables within the tablespace.

       Invoke innochecksum like	this:

	   shell> innochecksum [options] file_name

       innochecksum supports the following options. For	options	that refer to
       page numbers, the numbers are zero-based.

       o   -c

	   Print a count of the	number of pages	in the file.

       o   -d

	   Debug mode; prints checksums	for each page.

       o   -e num

	   End at this page number.

       o   -p num

	   Check only this page	number.

       o   -s num

	   Start at this page number.

       o   -v

	   Verbose mode; print a progress indicator every five seconds.

COPYRIGHT
       Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc.

       This documentation is free software; you	can redistribute it and/or
       modify it only under the	terms of the GNU General Public	License	as
       published by the	Free Software Foundation; version 2 of the License.

       This documentation is distributed in the	hope that it will be useful,
       but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A	PARTICULAR PURPOSE. See	the GNU
       General Public License for more details.

       You should have received	a copy of the GNU General Public License along
       with the	program; if not, write to the Free Software Foundation,	Inc.,
       51 Franklin Street, Fifth Floor,	Boston,	MA 02110-1301 USA or see
       http://www.gnu.org/licenses/.

SEE ALSO
       For more	information, please refer to the MySQL Reference Manual, which
       may already be installed	locally	and which is also available online at
       http://dev.mysql.com/doc/.

AUTHOR
       Sun Microsystems, Inc. (http://www.mysql.com/).

MySQL 5.1			  04/06/2010		       INNOCHECKSUM(1)

NAME | SYNOPSIS | DESCRIPTION | COPYRIGHT | SEE ALSO | AUTHOR

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