MySQL Enterprise Authentication integrates with external authentication systems such as LDAP and Active Directory and also supports multi-factor authentication (MFA) for enhanced security, ensuring users are authenticated through multiple verification methods.

The innodb_log_file_size parameter controls the size of the redo log files, which are essential for recovering transactions in the event of a crash. The larger the log file, the more data can be stored before it is flushed to disk.

The InnoDB Storage Engine ensures data integrity by providing transaction support and crash recovery features. It uses transaction logs to recover data in case of a crash and ensures ACID compliance for data integrity.

MySQL Enterprise Authentication supports multi-factor authentication (MFA), which enhances security by requiring multiple forms of verification before granting access to the database.

The binary log records all changes made to the database (such as updates, inserts, and deletes). These logs are used to replicate these changes to the replica servers.