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157 lines
4.2 KiB
Groff
157 lines
4.2 KiB
Groff
'\" t
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.\" Title: \fBinnochecksum\fR
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.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
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.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
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.\" Date: 04/06/2010
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.\" Manual: MySQL Database System
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.\" Source: MySQL 5.1
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.\" Language: English
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.\"
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.TH "\FBINNOCHECKSUM\FR" "1" "04/06/2010" "MySQL 5\&.1" "MySQL Database System"
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.\" innochecksum
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.SH "NAME"
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innochecksum \- offline InnoDB file checksum utility
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.SH "SYNOPSIS"
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.HP \w'\fBinnochecksum\ [\fR\fB\fIoptions\fR\fR\fB]\ \fR\fB\fIfile_name\fR\fR\ 'u
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\fBinnochecksum [\fR\fB\fIoptions\fR\fR\fB] \fR\fB\fIfile_name\fR\fR
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.SH "DESCRIPTION"
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.PP
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\fBinnochecksum\fR
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prints checksums for
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InnoDB
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files\&. This tool reads an
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InnoDB
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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
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InnoDB
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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\&.
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.PP
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\fBinnochecksum\fR
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cannot be used on tablespace files that the server already has open\&. For such files, you should use
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CHECK TABLE
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to check tables within the tablespace\&.
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.PP
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If checksum mismatches are found, you would normally restore the tablespace from backup or start the server and attempt to use
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\fBmysqldump\fR
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to make a backup of the tables within the tablespace\&.
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.PP
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Invoke
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\fBinnochecksum\fR
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like this:
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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shell> \fBinnochecksum [\fR\fB\fIoptions\fR\fR\fB] \fR\fB\fIfile_name\fR\fR
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.fi
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.if n \{\
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.RE
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.\}
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.PP
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\fBinnochecksum\fR
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supports the following options\&. For options that refer to page numbers, the numbers are zero\-based\&.
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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\fB\-c\fR
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.sp
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Print a count of the number of pages in the file\&.
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.RE
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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\fB\-d\fR
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.sp
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Debug mode; prints checksums for each page\&.
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.RE
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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\fB\-e \fR\fB\fInum\fR\fR
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.sp
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End at this page number\&.
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.RE
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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\fB\-p \fR\fB\fInum\fR\fR
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.sp
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Check only this page number\&.
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.RE
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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\fB\-s \fR\fB\fInum\fR\fR
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.sp
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Start at this page number\&.
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.RE
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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\fB\-v\fR
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.sp
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Verbose mode; print a progress indicator every five seconds\&.
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.RE
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.SH "COPYRIGHT"
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.br
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.PP
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Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc.
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.PP
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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.
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.PP
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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.
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.PP
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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 02110-1335 USA or see http://www.gnu.org/licenses/.
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.sp
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.SH "SEE ALSO"
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For more information, please refer to the MySQL Reference Manual,
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which may already be installed locally and which is also available
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online at http://dev.mysql.com/doc/.
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.SH AUTHOR
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Sun Microsystems, Inc. (http://www.mysql.com/).
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