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A Quick Look at MySQL 6.0’s New Backup
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MYSQLDUMP(1) General Commands Manual MYSQLDUMP(1) NAME
mysqldump - text-based client for dumping or backing up mysql databases , tables and or data. USAGE
mysqldump [OPTIONS] database [tables] OR mysqldump [OPTIONS] --databases [OPTIONS] DB1 [DB2 DB3...] OR mysqldump [OPTIONS] --all-databases [OPTIONS] OPTION SYNOPSIS
mysqldump [-A|--all-databases] [-a|--all] [-#|--debug=...] [--character-sets-dir=...] [-?|--help] [-B|--databases] [-c|--complete-insert] [-C|--compress] [--default-character-set=...] [-e|--extended-insert] [--add-drop-table] [--add-locks] [--allow-keywords] [--delayed- insert] [-F|--flush-logs] [-f|--force] [-h|--host=...] [-l|--lock-tables] [-n|--no-create-db] [-t|--no-create-info] [-d|--no-data] [-O|--set-variablevar=option] [--opt] [-p|--password[=...]] [-P|--port=...] [-q|--quick] [-Q|--quote-names] [-S|--socket=...] [--tables] [-T|--tab=...] [-u|--user=#] [-v|--verbose] [-V|--version] [-w|--where=] [--delayed] [-e|--extended-insert] [--fields-terminated-by=...] [--fields-enclosed-by=...] [--fields-optionally-enclosed-by=...] [--fields-escaped-by=...] [--lines-terminated-by=...] [-v|--verbose] [-V|--version] [-O net_buffer_length=#, where # < 16M] DESCRIPTION
Dumping definition and data mysql database or table mysqldump supports by executing -A|--all-databases Dump all the databases. This will be same as --databases with all databases selected. -a|--all Include all MySQL specific create options. -#|--debug=... Output debug log. Often this is 'd:t:o,filename`. --character-sets-dir=... Directory where character sets are -?|--help Display this help message and exit. -B|--databases To dump several databases. Note the difference in usage; In this case no tables are given. All name arguments are regarded as databasenames. -c|--complete-insert Use complete insert statements. -C|--compress Use compression in server/client protocol. --default-character-set=... Set the default character set -e|--extended-insert Allows utilization of the new, much faster INSERT syntax. --add-drop-table Add a 'drop table' before each create. --add-locks Add locks around insert statements. --allow-keywords Allow creation of column names that are keywords. --delayed-insert Insert rows with INSERT DELAYED. -F|--flush-logs Flush logs file in server before starting dump. -f|--force Continue even if we get an sql-error. -h|--host=... Connect to host. -l|--lock-tables Lock all tables for read. -n|--no-create-db will not be put in the output. The above line will be added otherwise, if --databases or --all-databases option was given. -t|--no-create-info Don't write table creation info. -d|--no-data No row information. -O|--set-variable var=option give a variable a value. --help lists variables --opt Same as --add-drop-table --add-locks --all --extended-insert --quick --lock-tables -p|--password[=...] Password to use when connecting to server. If password is not given it's solicited on the tty. -P|--port=... Port number to use for connection. -q|--quick Don't buffer query, dump directly to stdout. -Q|--quote-names Quote table and column names with ` -S|--socket=... Socket file to use for connection. --tables Overrides option --databases(-B). -T|--tab=... Creates tab separated textfile for each table to given path. (creates .sql and .txt files). NOTE: This only works if mysqldump is run on the same machine as the mysqld daemon. -u|--user=# User for login if not current user. -v|--verbose Print info about the various stages. -V|--version Output version information and exit. -w|--where= dump only selected records; QUOTES mandatory! --delayed Insert rows with the INSERT DELAYED command. -e|--extended-insert Use the new multiline INSERT syntax. (Gives more compact and faster inserts statements.) --fields-terminated-by=... --fields-enclosed-by=... --fields-optionally-enclosed-by=... --fields-escaped-by=... --lines-terminated-by=... These options are used with the -T option and have the same meaning as the corresponding clauses for LOAD DATA INFILE. See Mysql manual section 7.23 LOAD DATA INFILE Syntax. -v|--verbose Verbose mode. Print out more information on what the program does. -V|--version Print version information and exit. -O net_buffer_length=#, where # < 16M When creating multi-row-insert statements (as with option --extended-insert or --opt ), mysqldump will create rows up to net_buf- fer_length length. If you increase this variable, you should also ensure that the max_allowed_packet variable in the MySQL server is bigger than the net_buffer_length. EXAMPLES
The most normal use of mysqldump is probably for making a backup of whole databases. See Mysql Manual section 21.2 Database Backups. mysqldump --opt database > backup-file.sql You can read this back into MySQL with: mysql database < backup-file.sql or mysql -e 'source /patch-to-backup/backup-file.sql' database However, it's also very useful to populate another MySQL server with information from a database: mysqldump --opt database | mysql --host=remote-host -C database It is possible to dump several databases with one command: mysqldump --databases database1 [ database2 database3... ] > my_databases.sql If all the databases are wanted, one can use: mysqldump --all-databases > all_databases.sql SEE ALSO
isamchk (1), isamlog (1), mysqlaccess (1), mysqladmin (1), mysqlbug (1), mysqld (1), mysqldump (1), mysqlshow (1), msql2mysql (1), perror (1), replace (1), safe_mysqld (1), which1 (1), zap (1), AUTHOR
Ver 1.0, distribution 3.23.29a Michael (Monty) Widenius (monty@tcx.se), TCX Datakonsult AB (http://www.tcx.se). This software comes with no warranty. Manual page by L. (Kill-9) Pedersen (kill-9@kill-9.dk), Mercurmedia Data Model Architect / system developer (http://www.mer- curmedia.com) 19 December 2000 MYSQLDUMP(1)
