Beginning with MySQL 4.0, InnoDB is enabled by default, so the following information applies only to MySQL 3.23.Section 2.2.5, "Installing MySQL on Other Unix-Like Systems," and Section 4.1.2, "The mysqld-max Extended MySQL Server."Section 2.3, "MySQL Installation Using a Source Distribution."Section 9.4, "InnoDB Configuration.")
In MySQL 3.23, you must specify at the minimum an innodb_data_file_path value to configure the InnoDB data files. For example, to configure InnoDB to use a single 10MB auto-extending data file, place the following setting in the [mysqld] section of your option file:
[mysqld] innodb_data_file_path=ibdata1:10M:autoextend
InnoDB will create the ibdata1 file in the MySQL data directory by default. To specify the location explicitly, specify an innodb_data_home_dir setting. See Section 9.4, "InnoDB Configuration."