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

INNOCHECKSUM(1)            MariaDB Database System           INNOCHECKSUM(1)

NAME         top

       innochecksum - offline InnoDB file checksum utility

SYNOPSIS         top

       innochecksum [options] file_name

DESCRIPTION         top

       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.

       ·   -?, --help

           Displays help and exits.

       ·   -c, --count

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

       ·   -d, --debug

           Debug mode; prints checksums for each page.

       ·   -e num, --end-page=#

           End at this page number.

       ·   -i, --per-page-details

           Print out per-page detail information.

       ·   -I, --info

           Synonym for --help.

       ·   -l, --leaf

           Examine leaf index pages.

       ·   -m num, --merge=#

           Leaf page count if merge given number of consecutive pages.

       ·   -p num, --page-num=#

           Check only this page number.

       ·   -s num, --start-page

           Start at this page number.

       ·   -u, --skip-corrupt

           Skip corrupt pages.

       ·   -v, --verbose

           Verbose mode; print a progress indicator every five seconds.

       ·   -V, --version

           Displays version information and exits.

COPYRIGHT         top

       Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc.,
       2010-2015 MariaDB Foundation

       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         top

       For more information, please refer to the MariaDB Knowledge Base,
       available online at https://mariadb.com/kb/

AUTHOR         top

       MariaDB Foundation (http://www.mariadb.org/).

COLOPHON         top

       This page is part of the MariaDB (MariaDB database server) project.
       Information about the project can be found at ⟨http://mariadb.org/⟩.
       If you have a bug report for this manual page, see 
       ⟨https://mariadb.com/kb/en/mariadb/reporting-bugs/⟩.  This page was
       obtained from the project's upstream Git repository 
       ⟨https://github.com/MariaDB/server⟩ on 2017-09-15.  If you discover
       any rendering problems in this HTML version of the page, or you
       believe there is a better or more up-to-date source for the page, or
       you have corrections or improvements to the information in this
       COLOPHON (which is not part of the original manual page), send a mail
       to man-pages@man7.org

MariaDB 10.1                     14/12/2015                  INNOCHECKSUM(1)