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innobackupex is the tool that glues xtrabackup and tar4ibd, which are specific tools, plus adding functionality to provide a single interface to backup all the data in your database server.
To create a full backup, invoke the script with the options needed to connect to the server and only one argument: the path to the directory where the backup will be stored
$ innobackupex --user=DBUSER --password=DBUSERPASS /path/to/BACKUP-DIR/
and check the last line of the output for a confirmation message:
innobackupex: Backup created in directory '/path/to/BACKUP-DIR/2013-03-25_00-00-09' innobackupex: MySQL binlog position: filename 'mysql-bin.000003', position 1946 111225 00:00:53 innobackupex: completed OK!
The backup will be stored within a time stamped directory created in the provided path, /path/to/BACKUP-DIR/2013-03-25_00-00-09 in this particular example.
innobackupex called xtrabackup binary to backup all the data of InnoDB tables (see Creating a Backup for details on this process) and copied all the table definitions in the database (.frm files), data and files related to MyISAM, MERGE (reference to other tables), CSV and ARCHIVE tables, along with triggers and database configuration information to a time stamped directory created in the provided path.
It will also create the following files for convenience on the created directory.
This option tells innobackupex not to create a time stamped directory to store the backup:
$ innobackupex --user=DBUSER --password=DBUSERPASS /path/to/BACKUP-DIR/ --no-timestamp
innobackupex will create the BACKUP-DIR subdirectory (or fail if exists) and store the backup inside of it.
You can provide other configuration file to innobackupex with this option. The only limitation is that it has to be the first option passed:
$ innobackupex --defaults-file=/tmp/other-my.cnf --user=DBUSER --password=DBUSERPASS /path/to/BACKUP-DIR/