InnoDB has started using named file formats to improve
compatibility in upgrade and downgrade situations, or
heterogeneous systems running different levels of MySQL. Many
important InnoDB features, such as table compression and the
DYNAMIC row format for more efficient BLOB
storage, require creating tables in the
Barracuda file format. The
original file format, which previously didn't have a name, is
known now as Antelope.
To create new tables that take advantage of the Barracuda
features, enable that file format using the configuration
value of this parameter determines whether a newly created table
or index can use compression or the new
To preclude the use of new features that would make your database
inaccessible to the built-in InnoDB in MySQL 5.1 and prior
or set it to Antelope.
You can set the value of
innodb_file_format on the command
line when you start
mysqld, or in the option
my.cnf (Unix operating systems) or
my.ini (Windows). You can also change it
dynamically with the
SET GLOBAL statement.
For more information about managing file formats, see
InnoDB File-Format Management.