[MySQL] how to use mysqldump.

--opt

This option is shorthand; it is the same as specifying --add-drop-table --add-locks --create-options --disable-keys --extended-insert --lock-tables --quick --set-charset. It should give you a fast dump operation and produce a dump file that can be reloaded into a MySQL server quickly.

The --opt option is enabled by default. Use --skip-opt to disable it. See the discussion at the beginning of this section for information about selectively enabling or disabling certain of the options affected by --opt.

1. Backup要下的指令是
mysqldump --add-drop-table --add-locks --create-options --disable-keys --extended-insert --single-transaction --quick --set-charset --user=username --password db_name [db_tables] > dumpfile.sql

2. restore要下的指令是
Edit the dumpfile.sql and put these lines at the beginning:

SET AUTOCOMMIT = 0;
SET FOREIGN_KEY_CHECKS=0;

Put these lines at the end:

SET FOREIGN_KEY_CHECKS = 1;
COMMIT;
SET AUTOCOMMIT = 1;

mysql --user=username --password db_name < dumpfile.sql