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)